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Old 09-07-2020, 06:35 PM   #1
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PLEASE HELP 94 National Sea Breeze Class A Motor home plumbing issues

Just bought our first RV. It's beautiful, everything seems to work fine. That is until we turned on the water pumps. As soon as we turned on the water pumps our ceiling started leaking. Everybody keeps saying it's probably the roof leaking condensation from the a.c. That's not it because my a.c. does have a great deal of condensation. However, the condensation rolls right off the roof. The roof doesn't leak at all. Whatever was leaking from the ceiling only happened when we filled the fresh water tank up and turned the water pumps on to take a shower. I have no Idea what it is or how to go about getting it fixed. Any suggestions would be greatly appreciated.
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Old 09-07-2020, 08:26 PM   #2
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First thing I'd do is tee into the out end of the pump and add a gauge.and a ball valve....then find a line as far away from the pump as you can and add another gauge......would be looking for pressure loss to see if a line or fitting had split or had a loose clamp...ball valve is so you can deadhead the pump for a pressure reading.....
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Old 10-21-2020, 02:25 PM   #3
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Originally Posted by bob caldwell View Post
First thing I'd do is tee into the out end of the pump and add a gauge.and a ball valve....then find a line as far away from the pump as you can and add another gauge......would be looking for pressure loss to see if a line or fitting had split or had a loose clamp...ball valve is so you can deadhead the pump for a pressure reading.....
Hi All New here. Just like Bob said that's a good place to start. I think I am going to try the impossible on mine by installing shut off valves after the pump on all my appliances if possible. I just bought my self a 92 sea breeze didn't really know what i was thinking I knows nothing about MH but here I am BTW do you have any manuals on your coach?
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Old 10-31-2020, 08:07 PM   #4
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I would think very few rv’s had water pipes running through the roof area. They were all down low on my 95 Coachmen and 99 Airstream. Where is the water coming out?
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Old 10-31-2020, 08:10 PM   #5
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And did it quickly stop leaking when you turned the pump off?
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Old 10-31-2020, 08:41 PM   #6
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My initial thought was someone put an overflow or something into a roof vent and the vent stack is broken....just an untrained thought.
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Old 10-31-2020, 10:06 PM   #7
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I would think very few rv’s had water pipes running through the roof area. They were all down low on my 95 Coachmen and 99 Airstream. Where is the water coming out?
This^^ is where to start, IMO. Very likely no plumbing in the ceiling, but a leak in a pipe that is in a wall or chase that has an opening to the ceiling could spray into the area and drip down.

A few questions,
1. Exactly where is the leak in the ceiling, relative to the side walls, room separations, or fixtures?
2. Does the pump run continually even if all faucets are off?
3. How soon after the pump is on does the leak begin?
4. Is there a leak even if no faucets are on but the pump is running?
5. How soon after pump is off does the leak stop?
6. Is there a leak when you are on city water?
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Old 11-01-2020, 10:29 AM   #8
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ok, sometimes, just the sequence of events will give you an answer
ljwt is on the right track
does it leak when you fill the water tank-no
does it leak when the pump is turned on -no
does it leak when when you try to take a shower-yes
ok, the shower plumbing is leaking, probably spraying
upward, indication a cracked valve. and inside a wall close to the top.
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