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Old 01-31-2011, 11:43 AM   #1
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Water Heater problems

Turned the water to hot, no water at all. Found a broken check valve and replaced (ok now). Any one know why the manuf. would install a check valve on the cold water side of water heater . 2001 Winnebago Horizon Itasca 36ft.

In this instance the ck. valve on the inlet was bad. If you ever have to change one-there is a tool made by (flair-it) for loosing fittings in tight spots.

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Old 01-31-2011, 11:47 AM   #2
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Typically there are three check valves in the fresh water system; one at the city water inlet (to prevent pump pressure from forcing water out the entry), one at the outlet of the water pump (to prevent city pressure from backing through the pump and filling the water tank and one at the cold inlet to the water heater. It’s there to prevent hot water from migrating back into the cold water system. If a branch cold line, say to the toilet, is plumbed (tee’d) into the cold line too close to the back of the water heater, it could siphon hot water out of the tank and into the toilet when it is flushed. It’s happened before!

Brian, Loretta & Daisy (Golden Retriever)
2008 Holiday Rambler Endeavor 40 PDQ , ISL 400
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Old 01-31-2011, 01:52 PM   #3
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water heater problems

Thanks for your input, I will find a better location and re-install the ck. valve between inlet and heater on the cold water side.
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