Free Software for Sprinkler Hydraulic Calculations by Alan Ashfield

WELCOME TO FREEHC.NET
Free Hydraulic Calculations on the Internet

Yes, everything here is completely free. Free for you to download as many times as required. Free to use on your projects without restriction, for as long as you want to use them. Free updates and upgrades constantly available. Free Email support from the program originator. Free from registration, activation, licences, contracts, dongles, copy-protection, upselling, expiry dates, time outs, degrading over time, unlock codes, credit / debit / payment information, advertising or 'in-app' purchases and NO usage tracking, spyware, toolbars, search engine links or unwanted extra programs so no personal details ever required or retained - you remain anonymous, if you don't Email me.
If you are involved in the design or installation of fire sprinkler protection systems, then you have come to the ONLY site on the Internet offering complete FREE multiple, modern and innovative "Windows" XP, Vista, 7, 8.1 or 10 programs for CAD, hydraulic and associated calculations.
There is a lot to go through so please scroll down for detailed information and download links for my TWENTY ONE, simple to quite complicated, programs all in the English language and metric units that you can make immediate use of in your design offices today. If using a Microsoft browser and you get a blue bar across the screen about 'SmartScreen', just click on "More info" and "Run anyway" to download and run my recent programs.

Featured Program for August 2017 : CAD2ENRULES (#3 of 21 below) ...

Do you use a Computer Aided Design (CAD) program to produce 2D sprinkler layout drawings / details and show the pipe sizes (like the plan below) ?

CAD2ENRULES - LIBRECAD

Do you then use a separate program for the hydraulics calculations where you have to enter most (if not all!) the same data again for the one or more design areas?

Are you fed up in continually moving between these two transferring and updating information as it evolves or changes?

Do Reviewers keep picking up discrepancies between the drawing and the calculations or have problems relating the two together via 'node' numbers?

Then my CAD2ENRULES program is just the solution you have been seeking. All I ask is that you add a few more text items to the drawing, just for any vertical pipes and some project data (that you were going to type in anyway) for it to turn the pipework into a 3D isometric so the hydraulics and results presentations are a couple of mouse clicks away. All without having to learn a new CAD or hydraulics program and which is FREE!

CAD2ENRULES - RESULTS

DOWNLOAD CAD2ENRULES now or READ MORE about it ...

You can download the free LIBREOFFICE package and follow my simple instructions to produce your own personalised hydraulics calculator spreadsheet :-
LIBRECALC hydraulics calculator
given at the bottom of this webpage (hold Ctrl key down then press End) ...

Changes / additions to website / programs in 2017 ...

[3rd August] Added pipe / fittings quantities list to CAD2ENRULES [808 kB] ...

[3rd August] Added pipe / fittings quantities list and "ME" code for multi-level pipe layouts to CAD2HCP [844 kB] - see 'Help' and DEMO6 for details ...

[15th July] Added 'ME' code especially for multi-level systems in CAD2ENRULES [804 kB] - see 'Help' and DEMO6 for details ...

[7th July] ISO2HCP added (see #4 of 21 below) to do the hydraulic calculations of sprinkler / spray systems directly from an ISOMETRIC CAD drawing to the NFPA / FM Rules in metric units only ...

[16th June] You can also select operating heads in CAD2ENRULES by drawing "boxes" around them in a plan view - especially useful for most favourable design areas and gridded systems ...

[2nd June] Thank you for visiting this website in vastly increasing numbers since I added my unique CAD2HCP / CAD2ENRULES programs. Come and join the hundreds of sprinkler designers and contractors around the world who have abandoned their expensive and time-consuming standalone hydraulics programs now that these calculations can be quickly done DIRECTLY from your 2D sprinkler layout drawings all for FREE ...

[8th May] 15 more pipe types added to FIRSTHCP (#1 of 21 below) and this information is now stored in a user-editable database file as requested ...

[4th April] Another program called CAD2ENRULES (see #3 of 21 below) which makes your existing hydraulics program obsolete by carrying out all the most remote / favourable design area calculations to the EN12845 (and similar) Rules from just the information on your 2D CAD sprinkler layout drawing ...

[20th March] An essential new program CAD2HCP (see #2 of 21 below) which will do all the NFPA / FM hydraulic calculations directly from your CAD sprinkler layout drawing ...

[14th March] A major new program called FIRSTHCP added (see #1 of 21 below) so why not make this your first hydraulic calculations program ...

This is the most comprehensive site you will find on the Internet specifically for fire sprinkler hydraulic analysis software and while other suppliers may have 1 or 2 high-priced alternatives, I offer 21 modern, tried-and-tested programs and they are ALL FREE ...

  • They can calculate all types of water-based fire protection pipework schemes; end- or centre-fed terminal, looped, gridded, wet-dry-alternate, birdcage, ring, roof or roof+rack, ESFR, large drop, spray, deluge, drencher, high-velocity special risk, hydrants, hosereels, monitors, water-guns, mist, fog, foam, or combination of any design area for any hazard or occupancy risk you are ever likely to encounter
  • So whatever your involvement in the consultancy, design, installation, testing or review of fire sprinkler systems to all the major design specifications, my programs are all easy-to-use and apply, at zero charge nor any further time or costs for training especially if you just do a few hydraulic calculations a year or have never contemplated doing so. Ten minutes of your time to scroll down the rest this HOME page will save you thousands in buying similar software to do the same task
  • I alone have developed these programs (and many others going back to CP/M and MS.DOS days) so can therefore answer all your enquiries by E-mail on any design or specific program related topic - I am based in the United Kingdom
  • Download one or more of these programs in just a couple of mouse clicks and examine the in-built help and demonstration examples to convince you that they will be suitable for all your future projects
  • All are for Windows XP, Vista, 7, 8.1 or 10 (32/64-bit but not RT or W10 S) and minimum of 1366 x 768 screen (but HD 1920 x 1080 preferred) with printer optional, in all metric S.I. units so applicable worldwide except in USA / Myanmar
  • For the EN12845 RULES used throughout Europe, I offer my AACALC7, CAD2ENRULES, EASYSHP, VSHP, HYD, IPDS43 and AAVIEW7 programs
  • For the NFPA 13/15 + FM GLOBAL RULES used worldwide, there are FREESHP, FIRSTHCP, ISO2HCP, CAD2HCP and AACALC9 with a CAD program for Pipe Schedule systems called AACALC12 plus FREEWATERMIST for all types of NFPA 750 water mist systems
  • For BOTH the above, I offer AACALC8, AACALC10, AACALC11 and my latest FREEHC software packages
  • For the BS9251:2014 RULES, you can use NEW3RD
  • For High Pressure Carbon Dioxide systems, please try HPCO2
  • You can have the complete Pascal source code of FREESPRAY for spray, deluge, drencher, hydrant etc. systems using the Hazen-Williams formula
  • These program are only available to FREELY DOWNLOAD directly from this HTTPS encrypted website and nowhere else on the entire Internet. You just click on the links below to get a single .EXE file (from 0.5 to 2 MB in size) not requiring any setup, installation, unzipping, transfer of any support files etc. that you just SAVE to any directory / folder on your computer and which can be run immediately from there or a separate USB "stick" for portable use. All download links are shown in green lettering under each program listed below. If using a Microsoft browser and you get a blue bar across the screen about SmartScreen, just click on "More info" and "Run anyway" to download and run the programs.
  • 16.02.17 - Please see the bottom of this page for a full description and worked manual example of a typical hydraulic calculation if you are unfamiliar with the formulas and equations used

Please SCROLL DOWN for summaries, download links, more detailed information and instructions for each of my 21 programs - the only ENTIRELY FREE ones of their kind with the compliments of the UK's foremost developer of premier fire sprinkler hydraulics calculations software ...

FREE program #1 of 21 : FIRSTHCP

FIRSTHCP showing DEMO1

FIRSTHCP is simple "point and click" drawing program for first-time users to the NFPA 13 / 15 Rules and dating from March 2017.

DOWNLOAD this program now or READ MORE about it ...

FREE program #2 of 21 : CAD2HCP

CAD2HCP will permit you to prepare your sprinkler layout drawing with any 2D CAD program (the excellent free LIBRECAD one is shown here), following a few, simple guidelines to add some text alongside the pipe sizes on the LINE / CIRCLE entities :-

CAD2HCP - LIBRECAD

Choose "Open" in CAD2HCP to select the file name to see this automatically generated 3D isometric using these items of text :-

CAD2HCP - DEMO1

Just click on the heads within the required branch lines to immediately do all the full hydraulic calculations with the flow rates shown and the most remotest head in green :-

CAD2HCP - CALCS

One more click will show part of the RESULTS (use the 'arrow' keys to see the rest) :-

CAD2HCP - RESULTS

and one more click will PRINT to PDF or inkjet/laser printer if needed, or SAVE TO JPG, ZERO HEADS (to start a new design area) with other 3D views of your system and helpful labels (such as pipe pressures shown here) "zoomed in" :-

CAD2HCP - ZOOMED IN

I think you will find CAD2HCP is a viable, zero-cost alternative to your current task of abstracting and duplicating a lot of information and data from the sprinkler layout drawing to / from a separate hydraulics program, for the same project. With my latest program, the 2D CAD drawing is the hydraulics data file to the latest NFPA / FM Rules in metric units. Just by adding a few more notes next to the pipe size (that you always show anyway), you don't need to buy any Building Information Management (BIM / REVIT) programs or continue with your existing hydraulic calculations software. If you wish to follow the EN12845 (and similar) Rules, please continue downwards to CAD2ENRULES.

DOWNLOAD this program now or READ MORE about it ...

FREE program #3 of 21 : CAD2ENRULES

You just draw out the sprinkler heads and pipes following some simple guidelines in your existing CAD program and add sizes / notes (mainly on vertical pipes) and you have finished - both the layout drawing AND as many hydraulic calculation areas as you want a few minutes later with this program.

The following screen shots show how you run CAD2ENRULES with your 2D CAD layout drawing all done in LibreCAD or similar (here zoomed in to the top left hand corner) :-

CAD2ENRULES - LIBRECAD

Choose "Open" in the program (under Windows 7) to see the 3D isometric full size :-

CAD2ENRULES - DEMO1

Just draw a "box" around heads in a plan view or click on the heads at the end of the required ranges in an isometric view to immediately do all the full hydraulic calculations with the flow rates shown, with the most remotest 4 heads in green :-

CAD2ENRULES - CALCS

One more click will show part of the RESULTS (use the 'arrow' keys to see the rest) :-

CAD2ENRULES - RESULTS

and one more click will PRINT to PDF or inkjet/laser printer if needed, or you can get other views of your system with helpful text information. Here I have selected to view the pipe pressures and right clicked to zoom in - what could be easier?

CAD2ENRULES - ZOOMED IN

All the information about the project data, layers, sizes, design parameters, pipe sizes / types / bores and fitting types / equivalent lengths is stored in BSEN12845.TXT - but you can add to, change or copy it as many times as needed for your own country / company / specific projects / CEA / DBI / CP52 / AS2118 etc Sprinkler Rules and can even translate the text into your own language as shown below :-

CAD2ENRULES - BSEN12845.TXT FILE

No longer do you have to waste a lot of time in entering most (if not all!) the pipework / sprinkler heads that you have already drawn on the 2D CAD sprinkler layout plan into a separate hydraulics calculations program. Just by marking on a few extra items of text next to the size in mm against the pipes in CAD, I can produce a 3D isometric instantly and automatically so that any design area can be selected, the complicated "sums" done immediately and the familiar results presentation shown on screen / printed out. Try it out for yourself for FREE today and compare it to your existing design office procedures / workload - there are 6 demonstration examples to aid this evaluation. If you wish to follow the NFPA / FM Global Sprinkler Rules, please go back up the screen to CAD2HCP.

DOWNLOAD this program now or READ MORE about it ...

FREE program #4 of 21 : ISO2HCP

You prepare your isometric layout in your chosen CAD program as normal drawing the pipes as lines and the notes about the project data / design parameters / pipe sizes x lengths as text entities :-

LIBRECAD showing DEMO1.DXF

Run ISO2HCP and select DEMO1 from the 'File options' menu to see the project data, calculations summary and then the same drawing with all the flow, pressure, velocity etc hydraulics data displayed by moving your mouse over the pipe of interest :-

ISO2HCP - DEMO 1 calculations

Thats all! No need to node up the pipes, type in all the size, length, direction etc information to a separate full hydraulics program - this has all be done directly from your isometric - what could be easier?

DOWNLOAD this program now or READ MORE about it ...

FREE program #5 of 21 : FREEHC

Demo 2

FREEHC is a new, comprehensive and completely free "Windows" program for the full hydraulic calculations of all types of fire sprinkler protection systems to most countries rules and languages as follows :-

  • Light, Ordinary or High hazards for any building occupancies
  • Wet, dry, pre-action, end- or centre-fed, looped, gridded or birdcage pipework layouts or any combination
  • Roof, roof+rack, above / below ceiling, ESFR, spray, drencher, deluge, water curtain systems, fire hydrant ring-mains or, in fact, any water based fire protection system
  • Any area / density of coverage requirements easily complied with
  • Multiple sprinkler rules applicable to any country - EN12845, NFPA and FMGLOBAL initially provided, others easily added except BS9251/BS8458/BS8459/EN16925
  • Multiple languages (but not UniCode-based ones at present) - English initially, others requiring just translating a simple text file with instructions provided
  • Metric units only of course - I presume any countries still using "imperial" already have such software for their specific use
  • User editable database of pipe types, sizes and fittings to suit any project
  • Simple "point and click" pictorial, fully interactive, 3D user interface showing plans, elevations or isometric views of your pipework layout
  • Just "double-click" on plans / isometrics to 'zoom in' to that area and again to 'zoom out' to full size
  • All options and messages are contained in a narrow panel on the left hand side of the screen leaving the rest for the drawing
  • No "noding up" ever required and all "loops" automatically found in network
  • Creates .DXF CAD drawing files and .CSV ones for reading into spreadsheets
  • See the CAD2ENRULES program above if you prefer to do the CAD drawing first
  • At any time, you can press the F1 function key for detailed 'Help'

DOWNLOAD this program now or READ MORE about it ...

FREE program #6 of 21 : AACALC8

AACALC8 - page 4 of 5

An essential Windows "APP" for all sprinkler designers, installers and consultants in 5 sections :-

  • Optimum sprinkler spacing in a room of given size and maximum head area
  • Sprinkler head "K" factor, flow rate, pressure, area, density and specific gravity calculation with these added to end-fed range analysis with different pipe type, maximum allowable velocity and slope
  • Pressure drop in a pipe in two ways by adjusting sliders or typing in specific figures with the data / answers in different units as required
  • A unique flow / pressure graph (as above) for a wide range of pipe types, sizes, Hazen-Williams "C" factor and velocity for set ranges of flow rate
  • A useful determination of the length of a reduced pipe size for a given flow rate and pressure drop as permitted by the CEA4001 Rules

DOWNLOAD this program now or READ MORE about it ...

FREE program #7 of 21 : FREEWATERMIST

FreeWaterMist Demo 1

FREEWATERMIST will carry out the hydraulic calculations of NFPA 750 Standard on Water Mist Fire Protection Systems (2015 Edition) as follows :-

  • Deluge, Wet Pipe, Local, Engineered or Zoned Application arrangements
  • Low, Intermediate or High Pressure, single fluid, single liquid phase types
  • Light, Ordinary Group 1 or Ordinary Group 2 Hazard occupancy protection
  • Open or Thermally Activated nozzles
  • Copper or Stainless Steel pipe types with streamlined, soldered or threaded fittings
  • Without or with velocity pressure included at intermediate nozzles along branch lines
  • Without or with additives if density and absolute viscosity specified for the fluid
  • Darcy-Weisbach or Hazen-Williams (low pressure only) pressure loss formulas
  • Metric S.I units only (not U.S. Customary Units)
  • All pipe / nozzle flows and pressures balanced to less than 0.001 bars
  • Will determine minimum flow / pressure required at pumps / cylinders or these can be specified and the calculations all adjusted to suit and warnings given if nozzles become under their minimum pressures
  • No "noding up" needed and produces 2D and 3D DXF files for your CAD program
  • Database of suitable pipe types, sizes and fittings supplied which can be amended or added to for specific system types or projects

DOWNLOAD this program now or READ MORE about it ...

FREE program #8 of 21 : AACALC12

AACALC12 isometric

AACALC12 is for the Pipe Schedule sizing method in NFPA 13 directly from your CAD drawing to produce a materials take-off quantities list / estimate in metric units only.

DOWNLOAD this program now or READ MORE about it ...

FREE program #9 of 21 : AACALC11

AACALC11 - Demo 3

AACALC11 is a very simple spreadsheet based program to enable end-fed, looped and gridded fire protection pipework systems to be quickly entered, analysed and evaluated so that you may learn about full hydraulic calculations of sprinkler systems for yourself. It also shows a drawing (along with the input data and the results) by allowing the node numbers to represent the X and Y position percentages on the screen.

DOWNLOAD this program now or READ MORE about it ...

FREE program #10 of 21 : AACALC10

AACALC10 - Demo 1

AACALC10 is a spreadsheet based program to enable end-fed, looped and gridded fire protection pipework systems to be quickly entered, analysed and evaluated so that you may learn about full hydraulic calculations of sprinkler systems for yourself.

DOWNLOAD this program now or READ MORE about it ...

Please see the bottom of this page for a full description and worked manual example of a typical hydraulic calculation if you are unfamiliar with the formulas and equations used

FREE program #11 of 21 : AACALC9

Main AACALC9 screen

AACALC9 is simple "point and click" drawing program for first-time users to the NFPA 13 / 15 Rules and dating from February 2014.

DOWNLOAD this program now or READ MORE about it ...

FREE program #12 of 21 : FREESHP

Main FREESHP screen

Calculation of hydraulically designed sprinkler (room design and area/density methods) and spray systems to the NFPA 13/15 and FM Global Rules in metric units. Node references are only required at tees / crosses (not at each end of all pipes) and you give the size, length, direction and slope of the pipes to the operating heads / nozzles so a 3D picture is produced as a DXF file. There is just one way and place to add, break, copy, delete, edit, move, locate or view pipes - no confusing options to learn or superfluous videos / manuals needed to find out what does what! You may have a background CAD drawing so can "draw" the pipes on the building / rooms / services plan rather than a blank screen. See the CAD2HCP program above if you prefer to do the CAD drawing first.

Click here for tutorial [24th January 2013 - about 9kb - just "Save" it to somewhere on your hard disk]. I have redone this as as .RTF file so users with HD screens can just reduce the width of FREESHP and have WORDPAD or similar running alongside, making it easier to step through the various options and see the program in operation.

DOWNLOAD this program now or READ MORE about it ...

FREE program #13 of 21 : EASYSHP

Typical results from EASYSHP

Full hydraulic calculation of sprinkler and spray systems to the European EN12845 Rules in metric units. Innovative / unique features include just 4 screens - "File options", "Project and Pipe Data", "Calculate and Show Results" and "Help" - very quick and easy to apply for your projects using simple data entry procedures and immediate calculations. Does not need to produce a drawing as most Reviewers / Inspectors still insist on seeing your sprinkler layout drawings so have to manually match them with the hydraulic calculations.

DOWNLOAD this program now or READ MORE about it ...

FREE program #14 of 21 : IPDS43

Qcap / Qmax graph

A standalone program for the calculation of the Qcap and Qmax values for the Installers Pump Data Sheet as the EN12845 and similar Sprinkler Rules in the same format as EASYSHP, so can also be used with HYD and older programs that do not include such an option. You just enter the flows, pressures and highest heads for the most remote / favourable design areas as well as the pump / tank details. These are typed in on simple "tabbed" data entry screens and you can view the resulting diagram on the same screen. If you hold your mouse button over one of the 8 data points, you can then slide it up or down and have the pump curve drawn out to suit with the revised Qcap / Qmax values.

DOWNLOAD this program now or READ MORE about it ...

FREE program #15 of 21 : VSHP

Main VSHP screen

Full hydraulic calculation of sprinkler and spray systems to various International Rules in metric units. Innovative / unique features include an "all-in-one" user interface without needing to draw out the pipework scheme, a "grid wizard" option to automatically calculate the most remote / favourable design areas and show the Qcap/Qmax graph and easy to follow results presentation.

DOWNLOAD this program now or READ MORE about it ...

FREE program #16 of 21 : AACALC7

Typical screen display of AACALC7

Full hydraulic calculation of sprinkler and spray systems to the European EN12845 / CEA Rules in metric units. Innovative / unique features include a very comprehensive options list, producing a zoomable 3D "picture" of the pipework / heads with an aerial view on a building "background", multiple water supplies, unique range numbers (so a complete range can be copied with a single number) or pipe-by-pipe, range-by-range (using "node" numbers that you may be used to), fast calculations and easy to follow results presentation. LibreCAD (http://librecad.org) is Free Open Source Software for the creation / amendment of the DXF drawing files produced by AACALC7.

DOWNLOAD this program now or READ MORE about it ...

FREE program #17 of 21 : AAVIEW7

Example of AAVIEW7

A free viewing program for the various file types from my AACALC7 program including the CSV and XML options and 2D DXF CAD files as shown above.

DOWNLOAD this program now or READ MORE about it ...

FREE program #18 of 21 : NEW3RD

New3RD 3D drawing

NEW3RD is a very simple "page" based program just for BS9251:2014 Residential and Domestic fire sprinkler occupancies of 1 to 4 heads in 1 or 2 design areas based on the category and mains supply or stored water systems in metric units only.

DOWNLOAD this program now or READ MORE about it ...

FREE program #19 of 21 : HYD

Main HYD screen

Full hydraulic calculation of sprinkler systems to BSEN12845 Rules in metric units. Innovative / unique features include a simple nodes + pipes data entry method on one screen, editable pipe types/fittings database provided now free for all it's previous users. See also the IPDS43 program #14 of 21 above for Qcap / Qmax graph.

DOWNLOAD this program now or READ MORE about it ...

FREE program #20 of 21 : HPCO2

Main hpco2 screen

High pressure Carbon Dioxide pipework / nozzles calculations program to the NFPA 12, BS5306 and ISO6183 standards in metric units. Innovative / unique features include a simple "spreadsheet" like data entry method on one screen, rotatable 3D "picture" and user editable pipe types/fittings database provided free for all it's previous users. A new option 'EXACT' in Q9 will determine the required nozzle sizes in mm to maintain the specified discharge time in minutes, rather than selecting the nearest size from the database.

DOWNLOAD this program now or READ MORE about it ...

However, I do NOT have any software for low pressure CO2, FM200, Inergen, Novec1230, Argonite, LPG Inert IG-55, Nitrogen IG-100, Argon IG-01, Proinert or any other fixed-fire fighting gaseous systems, as only their suppliers have the equations, tables, procedures etc.

FREE program #21 of 21 : FREESPRAY

You can click here for the full source code and a test file for FREESPRAY to do the full hydraulic calculation of spray, deluge, drencher, hydrant etc. systems using the Hazen-Williams formula for the WINDOWS, LINUX, MacOS X and ANDROID operating systems. If you get a BROWSER WINDOW on screen after the download, then simply Copy/Paste the whole text into NotePad or another Text Editor and save them as freespray.pp and test1.txt in a new separate folder/directory. All the instructions for downloading the FREE PASCAL COMPILER are given as comments in the source code listing and no further programming knowledge is needed unless you wish to translate it into your own language or add pipe types/sizes/fittings. Users have already translated the 18 project questions and 11 warning messages into German, Icelandic, Norwegian, Polish, Danish, Dutch, French, Italian, Portuguese, Spanish and Swedish.

Users in China and India may be especially interested in Free Open Source Software (FOSS) such as FREESPRAY as those countries are trying to opt out of Western operating systems (Apple, Google and Microsoft), in favour of their own versions of Linux where you need the source code to compile your own individual version.

SUMMARY OF ALL ABOVE :-

Yes, all of my cost-effective "Windows" programs will not cost you anything :-

  • All are fully up-to-date and comply with the latest, most common sprinkler rules - NFPA, FM Global and derivatives of EN12845
  • Metric (S.I.) units applicable worldwide but not in USA / Myanmar
  • Printout formats and screen displays acceptable to the respective Fire Authorities, Reviewing Bodies, Insurance Company inspectors in your country, subject, of course, to individual job checking
  • None, however, have ever been "approved" by any of these organisations as they would never do so for any program that they did not directly control and only commercial firms and dedicated individuals will ever produce such specialised software
  • Some suppliers say that their programs follow the NFPA 13 / 15 / 750 Rules but the printout format is nothing like that given in the NFPA documents so unlikely to be acceptable
  • All calculations are performed in accordance with established sprinkler rules and so give EXACTLY the same answers as the few ~20 year old programs many of you might still use or have purchased
  • There are NO other free fire sprinkler hydraulic calculation programs elsewhere on the Internet, so no point in searching for alternatives as you have found them all here
  • Other sites may say their programs are free, but that is ONLY for download and 15 / 30 day trials - you have to PAY to actually use them on your projects
  • WINDOWS XP, Vista, 7, 8.1 or 10 with Arial and Lucida Console fonts (only FREESPRAY is available for Linux, Apple MacOS X or Google Android but not Chromebooks)
  • Simple DOWNLOAD (0.5 to 2Mb EXE file) - no install/set-up, addons, viruses or malware so you can have multiple copies direct from this HTTPS website
  • If you have never downloaded programs before from the Internet, then please Email me for detailed instructions specifying the browser / Windows version you have
  • Guaranteed NO usage tracking, spyware, toolbars, search engine links, unwanted extra or potentially unwanted programs
  • No charges for annual updates, extra copies, training or support by Email
  • No personal details ever needed or Email addresses, registration, activation, upselling, tracking, expiry dates, time outs, degrading over time, unlock codes, credit / debit / payment information, advertising or 'in-app' purchases
  • You will see that I have always give the extent and scope of the input data needed for the various programs - strangely missing from most other suppliers websites and so you only find out what information is actually needed to perform the full hydraulic calculations for the one or more design areas of your projects until you download them and read the help screens
  • All my hydraulics programs are really comprehensive in their features and options but are easy to use with modern intuitive, graphical interfaces, inbuilt help and demonstration examples proved on real projects
  • I think that you will find that nobody has produced any NEW software in this field (apart from my programs listed) as they obviously cannot compete with all my FREE ones so if you are waiting for your current supplier to come up with a replacement, you are going to be disappointed
  • I, on the other hand, are quite able and willing to DEVELOP any similar sprinkler hydraulic calculations program that you, as an individual or company, may require for your own use (not to sell of course!) - just Email me a full specification (click here for more details)
  • I also do not offer any 'paid for' videoes or all day training courses anywhere that overwhelm you with the sheer volume of content - much better to have one of my FREE programs on your PC that you can learn step-by-step at your own pace and I am here by Email should you get "stuck" at any point or if anything is not clear, all at zero cost
  • You get FREE technical support by EMAIL from the same person who wrote these programs but I will never send you an Email, except to reply to your one(s) as I do not have any 'partners' or incentive to sell you anything
  • I am not on Facebook, Twitter, LinkedIn, Skype or contactable by telephone
  • I do not have any other premium or 'paid for' programs and will never produce software for Building Information Management (BIM / REVIT) systems nor for estimating the operating time of DRY sprinkler systems
  • On the other hand, if you think that "anything free is not worth what you paid for it" then just ignore my programs and buy one from another supplier and see how little different it is!

Manual calculation example (16.02.17) ...

I am sometimes asked by Email to show how my programs will get the
same answers as a manual calculation done with a pocket calculator,
so here is an example to explain the various formulas and equations
used for just 3 heads being supplied by 25, 32 and 40 mm pipes
along a branch line / range.
.
1) Assume a sprinkler head "K" factor of 80 on an Ordinary Hazard
scheme where the density is 5 mm/min and the area covered per head
is 12 sq.m, so we just have a minimum flow rate Q of 5 x 12 which
is 60 L/min, but what is the pressure?
.
2) Using the formula Q = K x square root of P (the pressure in
bars), we need to transpose this to give P in terms of the known
K and Q so is Q / K all squared which comes to 0.5625 bars.
.
3) If we assume a nominal 25 mm diameter pipe of type M to BS10255,
the actual internal bore is 27.35 mm and the Hazen-Williams "C"
factor is 120, so what would be the pressure drop of a 4 m length
(the reducing elbow at the head is included in the "K" factor) run
flat with no change in elevation?
.
4) Using the Hazen-Williams pressure drop formula :-
.
                                1.85
                605000.0 x L x Q
Pressure drop = ----------------
                 1.85       4.87
                C        x D
.
5) We have L = 4.0 m, Q = 60.0 L/min, C = 120 and D = 27.35 mm so
this works out to be
605000 x 4 x 1947.959007 / 7022.395823 / 9953646.213
which equals 0.06744157 bars.
.
6) The pressure at the second head is therefore this value plus
0.5625 bars which is 0.62994157 so giving a flow Q of 80 x square
root 0.62994157 ie. 63.49508682 L/min (about 3.5 more than the end
head because it is nearer to the source).
.
7) So the flow Q in the second 32 mm pipe is now 60 + 63.4950862 =
123.4950868 L/min along with L = 4.0 m, C = 120 but D is now 36.05
mm bore. The new pressure drop is
605000 x 4 x 7405.457734 / 7022.395823 / 38205743.91
which equals 0.066796438 bars.
.
8) The pressure at the third head is therefore this value plus
0.62994157 bars which is 0.696738008 so giving a flow Q of 80 x
square root 0.696738008 ie. 66.776667 L/min (again about 3.5 more
than the previous head).
.
9) So the flow Q in the third 40 mm pipe is now 123.4950868 +
66.776667 = 190.2717538 L/min along with L = 4.0, C = 120 and
D = 41.95 mm. The new pressure drop is
605000 x 4 x 16475.6476 / 7022.395823 / 79929053.53
which equals 0.071034263 bars.
.
10) The pressure at the start of this pipe is this value plus
0.696738008 which comes to 0.767772271 bars at a flow rate of
190.2717538 L/min.
.
11) So although we have 3 heads of nominal flow of 60 L/min, the
actual flow rate is just over 190 L/min (not 180) and the
pressure needed is 0.768 bars (not 0.56).
.
12) Perhaps this will demonstrate why nobody but nobody would ever
produce such hydraulic calculations manually - you are just bound
to make an error somewhere so getting the WRONG answer!
.
13) May I suggest you now download and run my very simple AACALC10
prgram (#10 of 21 above) and check the above calculation is the same.
You need to select "New" and type in 3 pipes as follows, pressing
{TAB} to replace the spaces below :-
.
100 110 41.95 120 4.0 0.0 0.0 80.0 60.0
110 120 36.05 120 4.0 0.0 0.0 80.0 60.0
120 130 27.35 120 4.0 0.0 0.0 80.0 60.0
.
14) It will only take a minute or two to type these values in,
noting each time that the hydraulic calculations are repeated
so that you see, on the top line :- 
.
Source duty = 190.3 L/min at 0.768 bars (ie. the same as above).
.
15) If you think that the 36.05 and 41.95 mm pipe sizes are too
big [as they are], then you simply redo the manual calculation
steps (7) to (10) and see how long it takes you.
.
16) So for 27.35, 27.35 and 36.05, the source is 198.8 L/min at
1.048 bars and for 27.35, 27.35 and 27.35, the source is 198.8 L/min
at 1.505 bars - is this what you calculated?
.
17) If you still have AACALC10 open, then you only need change
the pipe sizes and the calculations are done instantly.
AACALC10 - introduction
18) If AACALC10 is too complicated for you, then my AACALC8 will
repeat the same sums for a complete range from "page 2" simply
by setting K = 80, density = 5 and area to 12 - thats all. You
can even do 2 pipe friction loss calculations at the same time ...
AACALC8 - page 3 of 5
19) I have also provided FIRSTHCP (#1 of 21) where DEMO 3 is
this exact example to help you learn hydraulic calculations.
FIRSTHCP - View calculations
20) I can also suggest that you download the complete source
code of FREESPRAY (#21 of 21) for a real example of how such
calculations are carried out for complete sprinkler systems,
not just for 3 heads along a single branch line / range!
.
21) [27.07.17] If you want your own, free, personalised hydraulics
calculator and/or have not used a "spreadsheet" type program
before, then just download LIBREOFFICE onto your computer. I suggest
you do this via www.ninite.com (it is on the far right hand side
and you may want some of the other items listed). It only takes
a few minutes so then run the LIBREOFFICE program, select LIBRECALC
and type the first 5 numbers and [Enter] in the cells A1 to A5.
.
In A6, type
= 60500*SQRT(A4*A4+A5*A5)*A1^1.85/A3^1.85/A2^4.87 [Enter]
.
If you don't want the sloping length to be used, then just type
A4 instead of the SQRT( .. ) part.
.
In A7, type
=A5*0.098 [Enter]
.
In A8, type
=A6+A7 [Enter]
.
In A9, type
=A1/(0.04712*A2*A2) [Enter]
.
and as you do so, those values will be calculated and shown. You
can then enter the text items in B1 to B9 as needed and can format
the rows / columns with the required font, size, number of decimal
places as desired and SAVE it. That's all.

Alternatively, just CLICK HERE to download my suggested hydcalc.ods file of the above arrangement.

LIBRECALC hydraulics calculator
Thank you for taking the time to read the HOME page of my website - didn't take long, did it?

Why not try out one of my programs; I suggest you start with AACALC8 and FIRSHCP and see how you get on. If you don't like it, just delete it as it did not cost you anything and choose another of my programs or another supplier, if you can find one!

© Copyright 2009-2017 +++ Alan Ashfield +++ All Rights Reserved