db3058
New Member
I installed a Rinnai tankless with a dedicated re circulation line on one side of a 4000 ft home (There is a standard tank water heater on the other side). The tank water heater removed for the tankless had a passive re circulation line that was used for the return line. It worked with the tank and works now. I have 2 one way valves and an expansion tank set to 60 PSI to prevent hammer between the one way valves. The tankless works fine. The water has a long way travel, probably 150 ft from the Rinnai, under the house to the 2nd story master bedroom. It serves 1 whirlpool bath, 1 regular bath with shower, one shower with 2 outlet heads and 5 faucets. Water is set to 125. Main line is 3/4", recirc line is 1/2". There's only 2 of us in the house.
Although I'm getting old and harder of hearing I can clearly hear the re-circulation pump operating in 3 rooms of the house, where the recirc line obviously travels through. It's loudest closest to the tankless. The copper lines are insulated everywhere I have access to them under the house, where most of the travel is.
Is there any way to muffle the sound of the recirculating water? It's a low sound but easily heard and annoying.
Although I'm getting old and harder of hearing I can clearly hear the re-circulation pump operating in 3 rooms of the house, where the recirc line obviously travels through. It's loudest closest to the tankless. The copper lines are insulated everywhere I have access to them under the house, where most of the travel is.
Is there any way to muffle the sound of the recirculating water? It's a low sound but easily heard and annoying.