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Old 04-19-2021, 06:36 PM   #1
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2017 30' Classic
Spokane , Washington
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Water issues

We have a 2017 classic. When we hooked up the city water it filled the fresh water tank and it over flowed from the fresh water fill inlet. Also, we canít flush (rinse out)the black water tank as we use the inlet next to the city water inlet. Are we doing something wrong?
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Old 04-19-2021, 06:43 PM   #2
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The filling of the fresh tank is a very common problem. There is a check valve in the water pump to prevent this and it is not functioning correctly. The valve will get some particles in it and not seal. Running the pump will often clear out the particles which will resolve the issue.

I am not sure about your tank flush.
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Old 04-19-2021, 08:01 PM   #3
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It is possible that your "city water" may have contained grit "particles" [as Richard said], which may have caused both problems.

You should always use an inline RV water filter in the hose, both when filling the water tank, and when using city water directly, to keep grit out of the plumbing system. [link below]

For the pump, turn off the city water, make sure you have good clean water in your water tank, open a cold faucet, and then turn the pump on/off 4-5 times, about 4-5 seconds apart each time. This should free up any particles in the pump's anti-back-flow check valve. Close the faucet, turn on the city water supply, and see if the problem is solved. Repeat if needed.

For the black tank flush system, if grit got to the spray heads mounted in the top of the black water tank, and the tiny orifices in the spray heads are clogged with grit, those spray heads may have to be replaced, from what I have read here. This is a huge project IMO.

If you did get grit in the water somehow, there is probably some in the bottom of your water heater also. I would turn it off, let the water cool down so it is not scalding hot, remove the drain plug, open the PRV [pressure relief valve] and a hot faucet, and let the water heater tank drain. Have a bucket ready before you do this, and try to catch some of the initial water coming out of the drain hole -- is there visible grit in it?

Maybe you could review where your "city water" has come from recently. If it is from a private water system at a campground, which uses its own well water [vs. municipal water], that could be the source of the problem IMO. Even municipal city water can contain grit BTW, like then they work on the pipes in the street. In our neighborhood at home, we all monitor city water quality, and alert each other when anyone sees murky city water. One foul load of this can ruin a clothes washer full of nice white sheets etc..

Same solution for the trailer -- always use an inline water filter in the hose like this one:

https://www.amazon.com/Camco-TastePU...884562&sr=8-12

Good luck.
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Old 04-19-2021, 10:39 PM   #4
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Bad water pump check valve. ~$100 to replace the pump. Done.
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Old 04-20-2021, 04:38 AM   #5
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Care to post a pic of the can't use the tank flush connection question?
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Old 04-20-2021, 10:14 AM   #6
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Does the trailer batteries have anything to do with the trailer brakes?
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Old 04-20-2021, 10:48 AM   #7
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Quote:
Originally Posted by Jerrylax View Post
Does the trailer batteries have anything to do with the trailer brakes?
Jerrylax,

Yes.

Your brake controller supplies DC power to the brake magnets.

But the brakes do use the trailer batteries in the event of a breakaway from the tow vehicle. Power from batteries is then supplied via the breakaway switch plunger being pulled out.

And if you post any concern about brakes best place is in running gear, brakes etc.

Gary
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