<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by mugentuner</i>
<br /><blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by H2O Concepts</i>
<br />You have to take into account all of your friction losses in the system, multiply the psi losses by 2.31. This converts psi to feet. Then figure out what kind of pressure you want to run in your system and multiply that # by 2.31. Then you look at your worst case sprinkler head in regard to elevation. If your worst head is 15 ft above the level of you pump, you would add 15 ft to your pressure required in ft and your pressure loss in ft. Obviously, you would be better off if your pump and water source are located higher than your sprinkler heads. Too bad it isn't a perfect world
This gives you your total dynamic head (T.D.H.). You could size a pump to run every zone on your property at once if you wanted. It all boils down to paying for horse power on your electric bill. Personally, I would do all of the above calculations, then I would contact your local pump shop and tell them what you are trying to accomplish and they will size the pump. It would be necessary for them to know your losses, elevation gains or losses, and your required system pressure. 1 psi equals 2.31 ft
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Thanks for the reply. How would I go about figuring my friction losses in the system anyway so that I could go ahead with the formula above. Is this the same formula used on Jesse Stryker's homepage as well? Thanks for any other help. I like to educate myself on these things and i'm a fast learner when it comes to anything technical.
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Bump, for a great topic. Need more help on above. Thanks