Hey Everyone... Need a little help here...
I have a 14x28 rectangle pool w/ 4x8 steps (total about 15000 gal)
I have a Hayward 1HP Superpump (SP2607X10) and am getting a PSI of 14 at the filter...
I want to factor in the worst case so i backwash at 20psi...
Am i right in saying 20psi = 47...