Hello! Welcome to the wonderful world of pumps. Learn about pumps and pump systems. You can do calculations and trouble-shoot pump problems, everything is FREE. Need a shoulder to cry on, check out the forum. Whhhooo... and there's lots more. This web site has no affiliation with any pump manufacturer.

universal system

One formula for all systems, one to bind them all...There is only one formula required to analyze any system, here is one page that explains the formula and another page with some examples .

The relationship between velocity and flow in a liquid system.

How to select a small pump

A 2-page summary of formulas for analzing pump and liquid flow systems (total head and N.P.S.H.A.)
Pump system formulas(web page)    pdf format Download an example calculation

How friction is radically different in small pipes vs large pipes for the same velocity and length

Friction, small vs large pipes(web page)    pdf format
The calculations in Excel   

A solution to the Colebrook equation using Excel can be found here.

How high can you suspend water in a pipe?

How high can you suspend water in a pipe?(web page)    pdf format

The siphon, is it free energy? I think not. Also understanding how pressure varies in a pump system.

the siphon(web page)    pdf format

I find the terms pressure and head often get mixed up, here's my attempt to clarify this. Let's reveal what's behind the curtain. I'm calling this series of 3 articles "The Pump Companion"

pressure and static head(web page)    pdf format

pressure or head(web page)    pdf format

pressure and head as energy(web page)    pdf format

These apps allow you to make calculations directly on a web page (no java applets) or on your mobile browser. You can calculate: velocity, head from pressure, pipe friction, N.P.S.H.A, submergence requirement, specific speed, suction specific speed, pipe dimensions and pipe stress.

This video is a blackboard style presentation that shows how to develop the all important flow schematic.

Pump and process part 1
Pump and process part 2
Presentation sketches

This video is a blackboard style presentation that shows how friction is calculated with formulas.
Calculating friction with formulas
Presentation sketches
This spreadsheet allows you to do your own calculations.
Excel spreadsheet to calculate pipe friction with the Colebrook equation

Low pressure from a venturi venturi how does it work? venturi

The siphon venturi, energy for nothing? siphon

Pressure everywhere

This is an Android app to convert head to pressure, you can download it at the Google Play Store Android app imageat this link.

Video tutorials Why? Because you can get the gist of a subject in a minute when someone tells you about it.

2. Pumps and how they work. The basics: pumping from one tank to another Support document: Head and pressure formulas and sketches
3. The syphon and the demise of lightmypump.com
4. Determining flow and pump total head. Support document: Pipe friction tables
5. More about pressure, head and the syphon
6. Branch systems
7. Suction or not
8. Specific gravity, head and pressure
9. Specific speed of a centrifugal pump
10. The venturi
11. Centrifugal pump performance curves part 1
11a. Centrifugal pump performance curves part 2
12. System curve
13. Cavitation, what is it?
14. Minimum submersion height to avoid vortex formation
15. How to build an upside down aquarium in your dreams?

The following videos are a re-constitution of a presentation I gave in September 2014 to the Society of Piping Engineers and Designers of Calgary. It's a basic introduction to pump systems.

15a. Pumping and piping part 1, SPED presentation, Calgary March 27, 2013
15b. Pumping and piping part 2, SPED presentation, Calgary March 27, 2013
15c. Pumping and piping part 3, SPED presentation, Calgary March 27, 2013
15d. Pumping and piping part 4, SPED presentation, Calgary March 27, 2013
15e. Pumping and piping part 5, SPED presentation, Calgary March 27, 2013
15f. Pumping and piping part 6, SPED presentation, Calgary March 27, 2013
15g. Pumping and piping part 7, SPED presentation, Calgary March 27, 2013
15h. Pumping and piping part 8, SPED presentation, Calgary March 27, 2013
16. Buying your first pump, Calgary October, 2013

I am your host Jacques Chaurette and the author of this web site and most of everything in it. I live in Montreal, Canada. I have nothing to do with any pump manufacturing company and am not trying to sell you anything. Please join the Forum and ask any question you like. I can be reached at Yours truely.
The previous incarnation of this site was www.lightmtypump.com, yeah I know it seemed like a good idea at the time, I changed it to www.pumpfundamentals. The prior site to lightmypump.com was called www.fluidedesign.com it was abandonned (for bizarre reasons)and morphed into this site. Unfortunately by mistake, the domain name was allowed to lapse and someone else picked it up. Before that I had a site called www.pumpsRme.com, not very original I know, that was in 1992, everything was new then on the internet.

Yours truely


The advent of Google Earth has made us all feel much closer, download this file to see the headquarters of pumpfundamentals.com in Montreal. Check this web page for other places I find interesting in Montreal.

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(audio introduction)

If you are starting from scratch or you want to review what you know, check this out It will help you understand how centrifugal pumps and pump systems work.


Check out these cool experiments with fluids.


If you're currently designing a system or checking out an existing one, here are some ideas on what to avoid and what to look for.


An alphabetical list of pump and pump system terms that will show as well as explain the terminology.

This section is devoted to NEW ITEMS that have been added to the site or just interesting downloads or ideas that I have come across. Updated on April 9, 2009

See previous new items

I am back from Australia where I was working on a pulp & paper project near Melbourne.

Australia....what a place. I will miss it.

Yeah I know these are crazy pictures but it's my life. OK, down to business,

Jacques, Steve and Robin, long time members of the centrifugal pumps group on Yahoo meeting in Melbourne on May 28, 2006

Join a discussion group at www.pumpfundamentals.com/forum

If you would like to benefit or contribute your knowledge to pump users around the world, this is the place.

Please follow these guidelines when posting messages.


Sixteen (16) Applets or mini programs that you can run for FREE on this web site, calculate N.P.S.H.A., predict cavitation and more....

This site has alot of information and data:

  • Solved problems and helpful examples on various pumping system problems and how to solve them
  • Metric and Imperial formulas that you can use for pump and pump system calculations
  • A detailed manual (FREE) on how to do centrifugal pumps sizing and how to solve various pumping system problems.
  • ...and much more, just follow through the top menu

    hidden program for No don't click here!MY EYES ONLYNo don't click here!

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