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Old 10-19-2015, 10:30 AM   #15
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Originally Posted by rd tighe View Post
Pos hot water pressure is causing the problem. When do you notice the leak? We noticed when we were hooked up to city water and turned on the hot water heater we would get a leak. If we used the pump and blend off the pressure then ran the hot water heater no problem we will be talking to attwood to get a adjusting thermostat. We feel maybe to the water heaters to hot
Finally, back to the Internet! Richard, it looks like you were closest to the truth. After more experimenting it turns out that the leak is not related to being on city water, but rather to the hot water heater. It was just that when on city water we were most likely on a pad and noticed it, while when on the pump we were on grass and didn't. Regardless, if we turn on the water heater (gas or electric) and leave it on the leak will appear over time. Our short term solution is to not leave it on, and that helps a lot.

Did you ever get a response from Atwood, or find a real solution?

Dan
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Old 10-19-2015, 11:54 PM   #16
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Sounds like you need to reestablish the bubble in the water heater. If it's gone you have a solid system with no expansion capacity. When the water heater is on it heats up the water causing it to expand increasing the pressure and probably causing a leak. Google how to establish air bubble in rv water heater. Tha air slowly gets absorbed into the water going through the tank and needs to get re established. If that fixes it you can add a small acumulator to the system so you don't have to deal with the bubble in the future. Still want to find the leak and tighten it, not sure if there's a relief valve in your system, that may be where the 'leak' is coming from.
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Old 10-20-2015, 02:22 PM   #17
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We just put on a adjustable thermostat (not cheap) easy install.
It has been in for about 2 week. We now have it at a temperature that gives us hot water but less pressure. We have not seen any leakes but we haven't been on city water yet. When we talked to attwood they said open closest valve to the hot water heater and open the pressure relief valve to reestablish a air pocket. I found it doesn't last for very long. I have high hopes on this fix. Will let you know
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Old 10-22-2015, 11:53 AM   #18
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Originally Posted by rd tighe View Post
We just put on a adjustable thermostat (not cheap) easy install.
It has been in for about 2 week. We now have it at a temperature that gives us hot water but less pressure. We have not seen any leakes but we haven't been on city water yet. When we talked to attwood they said open closest valve to the hot water heater and open the pressure relief valve to reestablish a air pocket. I found it doesn't last for very long. I have high hopes on this fix. Will let you know
Richard (and HiJoeSilver),

We've been resetting the air pocket monthly per the Atwood manual, and that doesn't seem to have any effect. As far as your fix (thermostat), do you have any info to share on where you got it and how much it cost? For the short term it looks like we just have to be aware of not running the hot water heater for too long, and when we get a chance to pull the sink and check for a leak we'll do that. Still would like to know if there's a better way to get back there...

Dan
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Old 10-23-2015, 05:23 PM   #19
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Cost for thermostat was aprox $40 we got it a central trailer supply in Albuquerque New Mexico Trailer parts | camping supplies | camper parts | Central Trailer and Supply sow far so good regarding leaks
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Old 10-23-2015, 06:56 PM   #20
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We also had a small leak at the hot water temperature/pressure release valve when the hot water heated and expanded within the closed system. Found restoring the bubble in water heater works for a short time, then needs to be repeated. So I put a small Shurflo water pressure accumulator from Camping World (or Amazon, etc) under the bathroom sink. That takes up the expansion and no more leaks.

Easy install, screw it to the wall, take off the plumbing line to the bottom of the cold water side of the sink faucet and attach to one side of the accumulator. Then buy another plumbing line from a hardware store and run it from the other side of the accumulator up to the cold water side of the sink faucet.

About $30 for the water pressure accumulator and $5 for a 18" or 24" plumbing line. You might want to put a small hose clamp on the new water line if it's flopping around under there.
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Old 10-23-2015, 11:42 PM   #21
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We also had a small leak at the hot water temperature/pressure release valve when the hot water heated and expanded within the closed system.
It sounds like everyone finds a different leak when the water heats, whatever the weak point is in their particular system. In our case it's at the city water fill (lower fitting in the picture); I've tightened the screws a bit and it helps, but I need to tighten a little more. My plan is to replace the city water fitting, and add the accumulator you mentioned (looks like a ShurFlo 182-200, please let me know if you used a different one). I'm also going to cut the back panel under the sink and put a hinge on it, so I can get to the plumbing from there if needed.

Dan
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