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Open Roads Forum  >  Tech Issues

 > Shower water gets cold

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moneraipilot

Redmond, OR

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Posted: 07/13/10 10:10am Link  |  Print  |  Notify Moderator

When using the shower in our class C, we wet down then stop the water flow with the shower head shut-off. When the shower head is opened again, the water is cold for a few seconds as if the cold water has moved into the hot water lines. Is there any way to prevent this (check valve?) without making it difficult to winterize?

pulsar

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Posted: 07/13/10 10:14am Link  |  Print  |  Notify Moderator

Moved from Forum Technical Support to Tech Issues.

TXiceman

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Posted: 07/13/10 10:18am Link  |  Print  |  Notify Moderator

Install check valves in both the cold water and hot water lines before the shower.

Ken


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tmmar

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Posted: 07/13/10 10:26am Link  |  Print  |  Notify Moderator

Don't shut the shower off completely. Let some water continue to flow and the water temp should stay fairly consistent.


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vermilye

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Posted: 07/13/10 02:44pm Link  |  Print  |  Notify Moderator

In your case the water pressure for the cold water is a bit higher than the water pressure on the hot water side, which is typical. When you shut off the flow at the shower head, the cold water starts to run into the hot water line. Start the shower again & the cold water that filled the hot water line comes out.

The check valve is a one way valve that if placed in the hot water side will let the hot water flow out, but not let the cold water in.

In some cases the problem is the opposite - a blast of hot water. If that is the case, a check valve in the cold water line will solve the problem. Most sure solution is a check valve in each.

They should be placed as close to the mixing valve as possible, and, of course, in the correct direction. They will help if placed further back down the line if you can't get behind the shower.


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Fire Instructor

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Posted: 07/13/10 12:37pm Link  |  Print  |  Notify Moderator

TXiceman - More on your chack-valves answer, please! Where does one get the righght check valves? Do you install them adjactet to the shower valve or along the plumbing run to the shower? Do the check-valves affect flow at all?


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robsouth

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Posted: 07/13/10 10:46am Link  |  Print  |  Notify Moderator

Don't turn the water off at all. Just take a quick shower. We do and never run out of hot water with a 6 gallon tank. You can't linger, but you can get a good shower without ever turning the water off at the head.


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rvten

Crossville,TN

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Posted: 07/13/10 10:48am Link  |  Print  |  Notify Moderator

This is normal. The cold water line will over power the hot water line when shut off.


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livingaboard

Everett wa

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Posted: 07/13/10 10:50am Link  |  Print  |  Notify Moderator

I replaced the crappy shower valve in my rv with a decent one from Home Depot. It is a balanced valve or something like that so that I don't get a rush of hot water or cold water when turning the shower back on.


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louiskathy

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Posted: 07/13/10 10:51am Link  |  Print  |  Notify Moderator

That's totally normal for us except when we shut it off while we soap up, it goes to really hot and then back to normal.

For a real eye opener, have someone in the kitchen use the water while you are in the shower. Usually it's sometimes-forgetful me in the kitchen area and the forgiving half of us in the shower.


Kathy

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