Doesn’t reducing pipe size build pressure?
NO! This is a quite common misconception. Friction loss and Elevation Changes are what cause pressure loss in piping systems, factors which contribute to friction loss are: #1 Inside diameter #2 Pipe Material (IE: PVC, Galvanized, Copper, Polyethylene) #3 Flow in Gallons Per Minute #4 Length of pipeline #5 Changes in flow direction (Fittings) A good rule of thumb for elevation is 1/2 psi loss (or gain) for every foot of elevation. Gaining elevation you lose pressure, losing elevation you gain pressure. (actual loss is .433 psi) When sizing pipe always remember BIGGER IS BETTER! Return to top My sprinklers don’t spray as far as they should. My sprinklers don’t pop-up. If a sprinkler does not spray its rated distance, it is usually due to a lack of pressure. Sprinklers have an optimum pressure range at which they perform as specified. If the pressure at the sprinkler is too low, then the sprinkler does not spray as far as it should. The common remedies are to put bigger nozzles on the sp
