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Old 03-08-2020, 06:16 PM   #1
Rivet Master
 
2007 27' International CCD FB
San Diego , California
Join Date: Sep 2014
Posts: 1,405
Shower Drain Leak Solved

Posting this for posterity in case someone else has a similar problem.

I had a leak from the shower of my 27FB. Checked the pressure side from the wardrobe access panel and all is dry. Water would drip from under the access panels. Tested drain by bringing in a bucket of water to pour into the shower which then would leak. Fortunately, the water would leak only into the bellypan and not the interior floor.

Problem was the p-trap. Collar attaching the p-trap to the shower drain became brittle over the years and failed.

Access for a 27FB cannot be done under the belly as I found out. The plumbing is behind the banana-wrap outside of the frame rails. Fortunately, the 27FB interior has a furnace hose conduit between the end of the bed and shower closet. Take cover off, and pull furnace hose back under the shower. Reaching blindly into the little 5" hole there, I was able to remove the P-trap by feel and unscrew both collars.

Here's the pieces necessary to rebuild the p-trap:
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I used this kit - https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Also needed a short bit of 1.5" pipe, and 1.5" pipe coupler
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Old 03-27-2020, 09:17 PM   #2
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West Palm Beach , Florida
Join Date: Nov 2018
Posts: 45
Thank you for this! I want to inspect the shower plumbing for piece of mind in our 27FB soon - good to know I can access this through the furnace outlet hole.
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Old 03-28-2020, 11:48 AM   #3
2 Rivet Member
 
2003 25' Safari
Keizer , Oregon
Join Date: Apr 2019
Posts: 44
Hi
Too much glue weakens the plastic in the fittings. I have a tendency to over-do and have had to replace many plastic plumbing projects I did a year earlier due to breaking at the glue joint. Just a thin single once around with the glue swab brush and a twist as you push them together.
Good Luck!
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Old 03-28-2020, 01:15 PM   #4
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2007 27' International CCD FB
San Diego , California
Join Date: Sep 2014
Posts: 1,405
Actually, the piece that broke is what's called the strainer adapter. The screw collar piece specifically, which has no glue around that part.

It was surprising brittle, on my 2007 Airstream after 13 years. Seems like a common failure from searching around the web, even on other brand RVs.

The whole p-trap needed to be replaced as this strainer adapter is glued into the rest of the assembly.

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Boondocking option package:
'07 27FB Ocean Breeze "See Turtle", 3" lift
'09 Lexus LX570, on 33's
Tongue Mount Honda eu2200i - Rear Hitch - Underbelly Storage - Blizzard NXT w/ EasyStart - 3" Lift - 6" Fan Controller
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Old 03-28-2020, 01:17 PM   #5
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2017 26' Flying Cloud
Tampa , Florida
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I had a recurring leak in the shower drain of my previous MH. The shower had a brass fitting with threads and the drain connected with ABS pipe which ran horizontally. It always cracked at the junction. As I drove the MH flexed enough to tug on the pipe and eventually crack.
Finally I made a flexible connection between the brass drain fitting and the ABS drain pipe using a common rubber joint. NO MORE CRACKS!
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