Forum Discussion
DutchmenSport
May 10, 2017Explorer
There should be a water by-pass (or a set of water bypass) valves at the water heater. Here's an example of the 3 valve system:

Here's a 2 valve system with a built in check valve for the 3rd valve:

Here's a single valve system. There is a check valve on the water heater "out" that prevents the water from entering the wrong direction with in by-pass mode:

Switching between city water and your on-board pump will have no affect. This is down-stream.... at the water heater. By-pass will let water flow and by-pass the water heater. Look around the water heater, not the water inlet area. Keep looking, you'll find it.

Here's a 2 valve system with a built in check valve for the 3rd valve:

Here's a single valve system. There is a check valve on the water heater "out" that prevents the water from entering the wrong direction with in by-pass mode:

Switching between city water and your on-board pump will have no affect. This is down-stream.... at the water heater. By-pass will let water flow and by-pass the water heater. Look around the water heater, not the water inlet area. Keep looking, you'll find it.
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