Water Leak

vickyronoscar · February 26, 2020, 08:23:05 AM

We just purchased a 1995 Prevost Vogue Motorhome. It was a Mitchell conversion.

When I toggle on the water pump, fresh water pours out the plumbing vent cap located on the roof. It quits leaking if I crank / air up the coach.

Does anyone have know how to fix this malfunction?

buswarrior · February 26, 2020, 10:32:27 AM

Some pneumatic control or portion of your water system.

I'd be tracking that down and eliminating it.

Hard enough to keep a new coach full of air...

Happy coaching!
Buswarrior

Gary Hatt - Publisher BCM · March 04, 2020, 07:49:48 AM

This is really bizarre. I have never heard of such a thing and can't even imagine what would be causing it. I would love to see a short video of the water coming out the top of the vent as this is really strange. I can't wait to hear if anyone else has experienced this.

plyonsMC9 · March 04, 2020, 08:19:31 AM

OK, ditto re: video - interesting.
Also, does the leak also occur if on city water and not aired up?

Best Regards, Phil

Lin · March 04, 2020, 06:23:19 PM

Very interesting. Could it be possible that when the air bags deflate and the bus settles, it crimps a hose somewhere? Does it have a toilet that uses compressed air? I wonder if crosses water/air lines would do something weird like that.

chessie4905 · March 05, 2020, 04:18:03 AM

Is the water pump hooked up wrong and pressurizing the tank?

Jim Blackwood · March 05, 2020, 08:07:38 AM

I can't come up with a scenario that sends water out the roof vent. How large is this vent line? The typical 1-1/2" diameter or smaller? Is the holding tank full of water? Something here is not making any sense.

Jim

Dave5Cs · March 05, 2020, 08:25:35 AM

Was your bus ever a Fire truck?

richard5933 · March 05, 2020, 11:55:25 AM

The only time I've seen a tank overflow through the roof vent is when the city water connection has a malfunction which causes the black tank to overfill. As long as the toilet seal holds, the water will climb the vent tube and exit through the roof vent.
Can't see how that would be happening in this scenario though.
Have you looked in the vent tube from the roof to see what's in there?

DoubleEagle · March 05, 2020, 06:55:37 PM

Quote from: richard5933 on March 05, 2020, 11:55:25 AM
Have you looked in the vent tube from the roof to see what's in there?

That would be a riot, eyeballing the vent pipe just before the eruption.

Jim Blackwood · March 10, 2020, 08:11:39 AM

So... You guys think this was a Troll?
I did from the start, hence the post about trading buses that got deleted.

Jim

Knuckles · March 11, 2020, 04:42:21 AM

I also find it a little hard to belive. Only if on city water with a full black tank could water come out the vent