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 Whole house hot water circulation systerm
Author: Jack1945 (CA)

Replaces a Grundfos pump with a Watts Model 500803 pump.Old pump gave hot water in 5 seconds. New pump hot water in 3 minutes. New pumps runs. Both pump & check valve installed correct flow. Water flows ok from pump through drain on circulation systerm. Pump pull water through systerm & pushes water back into water heater through the cold recirculating water inlet about 6 inches above the heater drain. Any ideas

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 Re: Whole house hot water circulation systerm
Author: packy (MA)

"pull water through systerm" ????
it is supposed to pull water from approximately the farthest fixture hot pipe and return it to the water heater drain area.

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 Re: Whole house hot water circulation systerm
Author: hj (AZ)

That is what he said it does.

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 Re: Whole house hot water circulation systerm
Author: North Carolina Plumber (NC)

Is there a valve between the drain and the water heater ? It sound like something is restricting the flow. Was the old pump replaced because it wasn't running ?

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