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Old 07-18-2016, 02:57 PM   #11
Join Date: Mar 2016
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All good stuff to try, my son and his family has the Trailer out camping for the week (my wife and I have not even used it yet! Go figure) and I will check all the above ideas when he gets back.

I told him just to turn the pump off when they are not using it. Any problem doing this with the hot water heater or should he shut that off too.

I don't think I understand the low point drains, we have 2 on the trailer, I thought they drained the fresh water tank but I guess not.

If it is the pump it's very easy to work on it's s right under the kitchen sink at the front of the lower cupboard.

Thanks so again for the help, so much to learn!

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Old 07-18-2016, 03:45 PM   #12
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Originally Posted by mike837go View Post
My money is on the low point drains.

Power down the pump, depressurize the system and cycle the valves a few times.

The re-pressurize and listen for pump activity when all the valves are closed.
You can open the valves under pressure. That could blowout and debris that might be stuck in the o-ring.

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Old 07-18-2016, 03:48 PM   #13
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If there are no leaks, it could be, as mentioned earlier, expansion and contraction of the water (more likely the airspace in the water heater expanding and contracting), or even air slowly being absorbed into the water while under pressure. Or a leaking check valve in the pump.
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Old 07-18-2016, 10:55 PM   #14
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had a similar problem was the water heater plug leaking good luck!!
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Old 07-19-2016, 06:11 AM   #15
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Low point drains are for emptying the plumbing. On my unit they and the fresh tank drains are labelled the same. It's obvious under pressure which is which since the fresh tank drain will be a gravity drain whereas the low point will blast like an open faucet.
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Old 07-19-2016, 10:54 AM   #16
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Just an FYI, I just went out and turned on the water pump in my TT. It's been about 2 weeks since I had it on. When I turned it on it didn't even cycle at all so that means the pressure has held for those 2 weeks. When all things are right the pump should only come on when you open a faucet.
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Old 07-19-2016, 12:33 PM   #17
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Originally Posted by Jagiven View Post
You can open the valves under pressure. That could blowout and debris that might be stuck in the o-ring.
[potential argument alert]

Yes, you can open the pressurized system low-point drain valves while the system is pressurized. But, because of the on/off nature of the valves they POP open and closed when operated. It can be unsettling to those unfamiliar.

[back to our regularly scheduled reasonable discussions]

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