dwheels
New Member
I've read through the thread on Submersible Pumpbs and Multiple Check Valves. Let me describe my system before I ask my question.
My home’s hot water system consists of:
-2hp submersible pump at 65 ft. with a check valve near the surface. Well is 125’ from the house.
-A 32 gal. Polaris WH that feeds both domestic HW and the home’s hot water forced air heating system.
-A Proportional thermostatic mixing (flow control) valve to reduce water temp for the domestic side.
-A HW recirculation system to supply the master bath 50 ft. away.
The cold supply splits and feeds the mixing valve and the cold-in side of the WH. The original installation had two check valves. One between the cold supply and the water heater and one between the cold supply and the mixing valve. The recirc system draws hot water through the house and returns re-circulated water to the cold water supply side of the WH at a tee between the check valve and the WH cold-in.
Problem: When the well pump cycles, the check valves slam (hammer). So, soon after installation I removed the check valves to prevent hammer and subsequent damage. No surprise--now I get backflow and uneven temperatures on the domestic supply, especially when the recirc pump is on.
Will a cycle stop valve solve my problem and allow me to reinstall the check valves? Or, is there a better way to do this altogether? The installer removed the plastic check valves from both sides of the mixing valve. Should they be replaced?
Also, there’s no expansion tank on the WH. Should there be?
(Diagram Attached)
My home’s hot water system consists of:
-2hp submersible pump at 65 ft. with a check valve near the surface. Well is 125’ from the house.
-A 32 gal. Polaris WH that feeds both domestic HW and the home’s hot water forced air heating system.
-A Proportional thermostatic mixing (flow control) valve to reduce water temp for the domestic side.
-A HW recirculation system to supply the master bath 50 ft. away.
The cold supply splits and feeds the mixing valve and the cold-in side of the WH. The original installation had two check valves. One between the cold supply and the water heater and one between the cold supply and the mixing valve. The recirc system draws hot water through the house and returns re-circulated water to the cold water supply side of the WH at a tee between the check valve and the WH cold-in.
Problem: When the well pump cycles, the check valves slam (hammer). So, soon after installation I removed the check valves to prevent hammer and subsequent damage. No surprise--now I get backflow and uneven temperatures on the domestic supply, especially when the recirc pump is on.
Will a cycle stop valve solve my problem and allow me to reinstall the check valves? Or, is there a better way to do this altogether? The installer removed the plastic check valves from both sides of the mixing valve. Should they be replaced?
Also, there’s no expansion tank on the WH. Should there be?
(Diagram Attached)