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36' Grand Villa Bathroom Remodel

October 08, 2021, 03:49:14 pm

While I have searched high and low and can't come up with a good answer, I thought I would ask before I take a Sawzall to the bathroom of our "new" 1994 GV 3600 SBI.  A PO decided the bathtub and shower surround were looking a bit dingy so they painted everything (including the towel rack, skylight, and faucets).  Needless to say, it is all going to get removed and updated. 

My question is, it seems that the drain for the bathtub is above the floor and needs to stay 4" above the floor to have the proper slope to get to the grey tank.  This makes about 5' 9" of headroom as currently configured.  Has anyone taken out the tub and put in a shower and if so, how did you route your drain?

Thanks,
Mitch & Tiffany

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Re: 36' Grand Villa Bathroom Remodel

Reply #1 – October 08, 2021, 04:17:24 pm

I don't know anything about remodeling techniques.  I leave that stuff to the experts.

But, to give you a few data points to help your planning, I can tell you that our factory installed shower also sits about 4.75" above the floor.  It rests on a raised plywood platform, I suppose for the same reason - to allow room under the shower pan for the "P" trap and to provide some slope to encourage proper drainage.

Our shower provides about 5' 10" of standing room measured to the ceiling.  We have a 24" x 24" skylight centered above the shower stall that provides another 5" of valuable headroom for taller owners.

Below is a link to an old post that includes a photo of the open space under the factory shower floor installation.  You can see that they had to actually cut a recess in the "real" floor surface to make room for the shower trap.  It looks like they were trying the keep the shower pan floor as low as possible to maximize headroom in the shower stall.

Shower not draining - Caused by unlevel coach?

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Re: 36' Grand Villa Bathroom Remodel

Reply #2 – October 08, 2021, 04:55:26 pm

I wonder if replacing the p-trap with a hepvo would allow me to drop the floor a few inches? The drain goes under the vanity and ties in with the sink then runs to the gray tank so it is about a 6' run. At 1/4" per foot, I only need 1 1/2" of "fall" which would gain me about 3" of headroom by lowering the floor. Do any plumbers want to chime in?

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Re: 36' Grand Villa Bathroom Remodel

Reply #3 – October 08, 2021, 06:49:41 pm

The drop over 6' may be correct, but that would mean coach is completely level. Otherwise you may have drainage problem.

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