Hot water check valve

**terryannbautz** · 12-11-2019, 10:31 AM

So if I put the water heater on bypass I will get hot water? From reading that thread, I understood that to mean that you are bypassing the water heater, and cold water would come out both the hot and cold spigits. My cold water is fine, it is just the hot. My husband found something about a backflow prevention valve in the water heater, a valve where the hot water exits the water heater, it can sometimes break apart and get stuck and block the flow of the hot water out of the water heater?

**LV Naturist** · 12-11-2019, 11:07 PM

Originally Posted by terryannbautz

So if I put the water heater on bypass I will get hot water? From reading that thread, I understood that to mean that you are bypassing the water heater, and cold water would come out both the hot and cold spigits. My cold water is fine, it is just the hot. My husband found something about a backflow prevention valve in the water heater, a valve where the hot water exits the water heater, it can sometimes break apart and get stuck and block the flow of the hot water out of the water heater?

What was suggested was a simple check to confirm if in fact the check valve (backflow preventer) is defective. Once that is confirmed, you can take the heater off bypass and continue with the repairs. While in bypass you won't get hot water.

John

**Calbar** · 12-12-2019, 06:04 AM

Originally Posted by terryannbautz

So if I put the water heater on bypass I will get hot water? From reading that thread, I understood that to mean that you are bypassing the water heater, and cold water would come out both the hot and cold spigits. My cold water is fine, it is just the hot. My husband found something about a backflow prevention valve in the water heater, a valve where the hot water exits the water heater, it can sometimes break apart and get stuck and block the flow of the hot water out of the water heater?

This was suggested to help confirm if the check valve is bad and as John stated you will not get hot water. If you bypass the water heater and get good pressure then you have confirmed that you need to replace the check value on the water heater. If you still get poor pressure then it is something else.

Rob