Jzsjr
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Hello,
I have a grunfos recirculating pump that uses one's existing hot water cold water plumbing. It consist of the pump mounted above the water heater and a special valve mounted underneath a sink in our faraway bathroom. My issue is that when one flushes the toilet next to the sink that has the grunfos valve the pipe thumps when the toilet finishes filling. The one way to relieve the thumping is to open the cold water faucet on the sink with the grunfos valve. This then pulses the water for a few seconds. I installed some Chief arrestors on both water cut offs of the sink and an arrestor that fits on the water inlet of the toilet. I thought these helped out for a bit or lessened the degree of the thumping but overall the noise still exist. Is there something else I can try? I don't want to get rid of the system since it really does bring hot water instantly to the shower and that is a big deal in Atlanta now with our on going drought.
thanks,
Jim
I have a grunfos recirculating pump that uses one's existing hot water cold water plumbing. It consist of the pump mounted above the water heater and a special valve mounted underneath a sink in our faraway bathroom. My issue is that when one flushes the toilet next to the sink that has the grunfos valve the pipe thumps when the toilet finishes filling. The one way to relieve the thumping is to open the cold water faucet on the sink with the grunfos valve. This then pulses the water for a few seconds. I installed some Chief arrestors on both water cut offs of the sink and an arrestor that fits on the water inlet of the toilet. I thought these helped out for a bit or lessened the degree of the thumping but overall the noise still exist. Is there something else I can try? I don't want to get rid of the system since it really does bring hot water instantly to the shower and that is a big deal in Atlanta now with our on going drought.
thanks,
Jim