I have a CSV1A with a bypass of 3 GPM set to 65 PSI. The pump is a Goulds 18GS30. The pressure switch is set at 50/70 and the tank is 86 gal. The pump curve shows 0 GPM at 600 TDH or about 3 gallons at about 585' TDH. The static water level is 262'. The pipe from the pump is 1.25 schedule 80 PVC with a rating of 260 PSI stamped on the side. I understand the pressure at the CSV would be (585-262)/2.31=139.8 PSI. Is the pressure at the pump case 585/2.31=253 PSI because the weight of the 262' of water? If this is correct is it safe to operate the pipe at that pressure?
