Pop Pop
Hampstead, NC USA
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Joined: 05/03/2004
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Help! A new one after 20 years of RVing. I have no hot water pressure. Cold water works fine! No water leaking under RV. Took a shower and then it just stopped. One strange thing is the cold water works on "all" facuets expect the shower head. I drained system and flushed out water heater. Still no pressure. Any ideas?
Pop Pop
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crashpilot
Green River, WY
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Joined: 02/17/2005
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Sounds to me like someone is messing with you!! LOL
Check the valves that allow you to bypass the water heater when you winterize and make sure that lineup is correct.
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JFG
TN
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besides the by-pass valve, check any outside shower or hand washing station to make sure the water is turned off at the faucet handles and not just the wand button.
Fred
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BillArf
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Joined: 03/21/2005
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Well it probably is the water heater check valve as mentioned. Easy to replace by the way.
Also, if you have warm water but not hot enough go to your utility compartment on the outside of the rig and be sure the faucets there are turned off. IF they are not turned off the water will mix there and you will often get warm water versus hot water in the shower, etc.
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BillArf
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If you are interested in what the check valve looks like here is a pic that was posted on the forums a while back. Some do away with the valve altogether. It is there for a reason though so makes sense to replace it if indeed it is bad. If you change yours, be sure the arrows on the new valve are pointing in the right direction.
Moderator's edit: Reduced the size of the picture to the forum's recommended maximum of 640 pixels.
* This post was
edited 08/10/09 08:15am by an administrator/moderator *
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pulsar
Lewisville, NC
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Moved from Technology Corner to Tech Issues.
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tvman44
Southwest Louisiana
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Is that the check valve in the hot water line?
BillArf wrote:If you are interested in what the check valve looks like here is a pic that was posted on the forums a while back. Some do away with the valve altogether. It is there for a reason though so makes sense to replace it if indeed it is bad. If you change yours, be sure the arrows on the new valve are pointing in the right direction.
Moderator's edit: Reduced the size of the picture to the forum's recommended maximum of 640 pixels.
Papa Bob
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BillArf
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tvman44 wrote:Is that the check valve in the hot water line?
They use cheap plastic check valves in conjunction with bypass systems on most RV's. Often you see them at both the water heater cold water inlet and at the water heater hot water outlet. In the pic I displayed earlier the check valve is on the hot water line. Usually you will see red tape, red tubing or a red ribbon on hot water lines which are placed there when the RV is built.
Check valves are also made of brass.
Check valves can intermittently cause problems but usually just fail. Then you have no hot water if the particular check valve that goes bad is on an in or out water heater water line.
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javaseuf
California's Gold Coast
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Joined: 03/30/2005
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Contrary to popular belief of the reason for a check-valve, it's function is to prevent backflow into the water heater when winterizing and is part of the winterization by-pass plumbing. There will usually be no check-valve in a three-valve by-pass system.
If you don't have the need to winterize, I suggest you remove the valve.
Also, many valves are brass and are screwed directly into the water heater outlet threads.
Steve
2007 Springdale 291RKL
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BillArf
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I think many of us here realize why there is a check valve(s) but many of us are against bastardizing a factory install especially if they say have a pricey Class A, etc.. (Unless the factory error-ed) For me, I would replace the very inexpensive check valve regardless of the caliber of rig I had...just so it can continue to function as it was designed to. Again, to each his own. For sure, do keep the check valve(s)if you winterize!
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