Squealing RV Water Heater Fix – Failed Check Valve

In this video, I locate and replace a faulty brass 1/2″ check valve (one-way valve) in the RV water heater output piping. It turns out the rubber o-ring had split, and the spring was vibrating against the brass casing, making a heck of a racket.

I was able to narrow down the problem to the check valve while doing my routine water heater flushing. I noticed that even though the winterizing valve was in the correct position, I was still getting water trickling into the water heater.

Swapping Out a Noisy RV Check Valve

Split Check Valve O-ring
Split Check Valve O-ring
Water Heater Check Valve
New Water Heater Check Valve Installed

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Fix for a Squealing RV Water Heater - Replaced faulty Check Valve with failed Rubber O-Ring

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