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**chuckster57** · 11-02-2019, 12:24 PM

sounds like the water heater wasn't in BYPASS mode. Depending on how its plumbed, there can be from a single valve to three valves.

COLD IN is at the bottom of water heater HOT OUT is at the top, with that in mind:

SINGLE VALVE: it will be at the cold side. Handle of valve will point in the direction of flow, meaning if its pointed towards the line that goes into the heater then its in REGULAR mode ( hot water to trailer). If its pointed 90 degrees then its in BYPASS mode ( no flow to the heater). There is a check valve at the HOT OUT to prevent any back flow.

THREE VALVW: there will be a valve at the COLD IN, HOT OUT, and a line with a valve between the two. The COLD IN valve will point again to the flow of water. The difference is that the COLD IN and the HOT OUT have to be turned to PREVENT FLOW and the valve in the middle has to be turn to ALLOW FLOW to bypass the heater.

I hope this makes sense. In that video the cold valve was pointed UP to bypass the water heater

11-02-2019, 12:24 PM	#2
chuckster57 Site Team Join Date: Jul 2014 Location: Modesto Posts: 20,350	sounds like the water heater wasn't in BYPASS mode. Depending on how its plumbed, there can be from a single valve to three valves. COLD IN is at the bottom of water heater HOT OUT is at the top, with that in mind: SINGLE VALVE: it will be at the cold side. Handle of valve will point in the direction of flow, meaning if its pointed towards the line that goes into the heater then its in REGULAR mode ( hot water to trailer). If its pointed 90 degrees then its in BYPASS mode ( no flow to the heater). There is a check valve at the HOT OUT to prevent any back flow. THREE VALVW: there will be a valve at the COLD IN, HOT OUT, and a line with a valve between the two. The COLD IN valve will point again to the flow of water. The difference is that the COLD IN and the HOT OUT have to be turned to PREVENT FLOW and the valve in the middle has to be turn to ALLOW FLOW to bypass the heater. I hope this makes sense. In that video the cold valve was pointed UP to bypass the water heater __________________ 2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel. Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS. Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.