Are the solar heating system, pump, controls operating at correct pressure?

The only pressure gauge on the system we are discussing (see photos above) is at the pool filter and may not accurately represent the delivery pressure at the swimming pool pump. We need a pressure gauge at that location too. When we have really high pressure like that, we usually suspect the pressure gage is faulty. [Or its location is not measuring system pressure. See WATER TANK PRESSURE GAUGE for more about these devices.] A good clue as to what is happening without a pressure gage is to look at the flow. A better way is to install a $10 pressure gage from the pool store. You can see swirl in the skimmer basket if there is good suction side flow. You can of course feel a strong force of water at each of the inlets to the pool. At the subject swimming pool, we felt (by hand) good flow at the eight ports that deliver water into the swimming pool. -- DF Pumps also make weird sounds of they are overloaded. Pool system water pressure has nothing to do with solar collector performance, ...  more