During one of the high pressure moments, leave the pump on and tap lightly with a hammer on the check valve and see if it lets loose. If it is stuck it should swing open and the pressure drop.
Re: how to find blockage in recirculation loop
During one of the high pressure moments, leave the pump on and tap lightly with a hammer on the check valve and see if it lets loose. If it is stuck it should swing open and the pressure drop.
Mark
Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater
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