shower drain - Fiberglass RV


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Old 09-22-2002, 05:28 PM   #1
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shower drain

Does the front end of the Casita have to be slightly elevated for the shower to drain properly? When level, our 16' FD shower pan will not drain unless the gray water dump valve is open, irrespective of the position of the shower drain valve. Is there a secret I don't know about to get the drain to work? Thanks.:o
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Old 09-22-2002, 06:05 PM   #2
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Two things

Steve, two things cross my mind.

1. Did the shower ever drain ... or have you always had to have both the shower drain valve and the gray water drain valve open?

2. If the shower used to drain, but doesn't now, it's possible some mud daubber wasps built a nest in your grey water vent stand pipe. Water can't enter unless air has a way of escaping. So pop the cap off the top of the gray water tank stand pipe (on top of the Casita and have a look down it with a bright light.

3. If it's never drained, it's possible the rocket scientists at the Casita factory shoved the grey water stand pipe too deeply into the grey water tank ... causing even a minimal amount of water in the tank to cut off the air escape up the vent stand pipe.

I've heard of folks drilling a small air escape hole in the tank near the PVC stand pipe, just above where it enters the grey water tank. A little hole will let a lot of air escape ... and won't cause your gray tank to leak until it's full to the tippy top.
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Old 09-23-2002, 09:01 AM   #3
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shower vent

Charles,

Last night I elevated the front of the trailer and poured water into the shower drain.After backing up it started to drain, but did so with a lot of gulping noise, obviously starved for vented air. The vent for the shower drain appears to be the vent for the bathroom sink, as well. It does not physically enter the gray water tank, but simply ties into the sink drain, which ties into the "J" trap for the shower. Where would you drill the hole to vent it? There is only about a quarter inch of the standpipe showing below the underside of the trailer before it ties in to the sink drain.
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Old 09-23-2002, 11:02 AM   #4
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Call Casita

Steve ... I'd be skating on thin ice to tell you where to drill. You probably ought to call Casita ... probably have to talk with Jay first ... but ask to talk with Chuck. They'll know exactly what to do ... and can help, I'm sure. Give them my regards!

It seems to me that the standpipe has to tee into the gray tank somehow ... because it, too, has to be vented.

My trailer's down at the storage yard ... and I can't leave to take a look.

We have roofers here tearing off an old roof and putting on a new one. Their dumpsters, etc are blocking me in.
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Old 09-23-2002, 11:41 AM   #5
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Drilling

Steve,

Seems I remember a discussion on another BB that talked about drilling a hole in the top of the Gray water holding tank. Although that probably worked to releave the trapped air, it also dribbles out when you are camped if your tank is full. Many camps would be very unhappy with you if your RV made a mess on the ground.

Both the shower and the kitchen sink should have a vent tube to help releave the trapped air.

I agree with Charles, call Chuck at Casita. You will get some good advice and I'm sure a quality answer will be the best in the long run.

Good luck:wave
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Old 09-23-2002, 08:14 PM   #6
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I called the factory

I talked to Jay at Casita today. I'll let you know how it turns out.
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Old 09-27-2002, 02:39 PM   #7
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shower not draining

Steve:

One way:

get underneath (crank up the hitch jack far as you can), remove the rubber trap and 'fish' both ways to see if you can find a restriction.

or..........

try taking off the vent cap, stick a hose down as far as you can (6 ft), close the shower drain valve, open the grey water dump valve, and turn on the hose while watching for the water to come out either the top vent or the dump valve. Hopefully you'll blow out whatever is clogging the vent.

If it backs up and comes out the top vent.........well, perhaps it's time for some sort of 'roto-root' procedure.

============

I wouldn't drill the grey tank.
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Old 09-27-2002, 06:56 PM   #8
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shower drain fix

Jay and Chuck at Casita had pretty much the same advice as PineConeDon: check for obstructions. Since I had already done that I was running out of options, so I did what an earlier Casitian did and drilled the top corner of the gray water tank. The shower now drains. Thanks for all the suggestions.
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Old 10-02-2002, 07:28 PM   #9
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add a hose

if the leaking out is a problem add a hose to the hole, sticking out long enough to give you some room. silicon it in. attach the other end some where higher up and where it can't damage anything. Course bugs will problably get in that and you will have to start all over.:r
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