I have a 1/2 inch installed on the water pump (Danner Mag 12) which is the pump for my ATS. The line from the pump to the ATS is about 28" of rise and 3.5 feet of horizontal with 5 90 elbows, two threaded unions and 1 Gate valve. The tubing (PVC) from the pump is 1/2" and increases to 3/4" after the gate valve. With the gate valve fully open I am only getting 310 GPH of flow. I would like to have 350.
Could I get better flow if I did 3/4" from the pump, down to 1/2" for the monitor and than back to 3/4".
Second option might be 3/4' to 1" monitor and back to 3/4" after the monitor. That is how my return pump monitor is set up.
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