Low Water Pressure

[valkosr]

Our coach has the factory installed Pentair Shurflo Revolution 4008 Series By-Pass Pump. When operating on the pump it does not generate sufficient water pressure to activate the tankless water heater. I have done some research, but can not find any troubleshooting guides. Any thoughts or recommendations for a preferred pump to purchase to swap it out? Thanks, -Rich

[lwmcguire]

Check your filter and inlet plumbing

[valkosr]

Removed the water filter and checked the screen at the pump. I appear to have good pressure on the cold side, but still too weak on the hot side to activate the water heater. Is there a separate screen on the hot side that may be restricting the water flow?

[lwmcguire]

Originally Posted by valkosr

Removed the water filter and checked the screen at the pump. I appear to have good pressure on the cold side, but still too weak on the hot side to activate the water heater. Is there a separate screen on the hot side that may be restricting the water flow?

I am not familiar with your water heater, it is possible it has some type screen on the inlet

Might install a pressure gauge and see what psig you are developing