Thread Tools Display Modes
Old 09-17-2016, 05:11 PM   #1
Join Date: Mar 2016
Posts: 60
All is not as it seems.

I have a 2015 Flagstaff MicroLite 21FBRS. I just installed a new Thetford Aqua Magic Residence toilet. In doing so, I tore through the bathroom floor trying to remove the original metal closet flange (which I discovered is permanently attached to the black water tank). The floor is made of two sheets of very thin wood pressed together with 1/4" of white Styrofoam between them like an Oreo cookie. The wood was soft and wet, and now I know the cause of a spongy floor. I cut four pieces of 1/2" plywood and placed them tightly between the outer edges of the flange and the walls and shower stall to form a solid wooden frame. I then placed a new plastic flange with a down spout into the sewer hole directly on top of the original flange and fastened the new toilet with its two bolts. The existing toilet water supply line was measured to exactly fit the intake nipple of the original Dometic standard toilet, and is two inches or so too short to attach to the new Thetford toilet, which is taller and has its intake nipple in a different place. I had to manipulate the new toilet into a slightly cockeyed position to connect the water supply line. If anyone has an idea on how to easily extend the water supply line to correctly fit the new toilet, I would truly appreciate it. I was initially angry and frustrated with all the problems I've had with my trailer, but I am so comfortable with my repairs and modifications that I believe my trailer is much better now than when I first bought it. I didn't know nor appreciate that a new trailer could quickly turn into a fixer-upper, but I've learned a lot and have a renewed confidence in my unit. Happy fall camping my friends!

Hector517 is online now   Reply With Quote
Old 09-17-2016, 05:19 PM   #2
Senior Member
Join Date: Oct 2015
Posts: 106
A photo of what you have to deal with will bring lots of suggestions. Not knowing what you have, well, cut and add...... if you get my drift.

Dale & Karen
2015 Lacrosse 311RLS
2006 F-250 The 06-6.0
Dwilcox is offline   Reply With Quote
Old 09-17-2016, 05:55 PM   #3
Join Date: Mar 2016
Posts: 60
WIlcox, thanks for your reply. I haven't taken photos of any of my repairs and modifications. Perhaps I will begin to do so.
Hector517 is online now   Reply With Quote
Old 09-17-2016, 06:08 PM   #4
Senior Member
kenandterry's Avatar
Join Date: Sep 2010
Location: Southern Ontario, Canada
Posts: 869
Someone on this forum always posts


Ken and Terry
2010 Georgetown 330TS being pushed by our
2017 GMC Terrain toad (4 wheels down)
kenandterry is offline   Reply With Quote
Old 09-18-2016, 12:38 PM   #5
Senior Member
Join Date: May 2015
Posts: 189
Hector , the easy way is to cut your line near the floor use a shark bite fitting with a male 1/2" pipe end then use a flexible pre made line with two female 1/2" pipe ends to finish connection. It makes it real easy because you can hook up water line ,then mount toilet.
hillsdaletc is offline   Reply With Quote
Old 09-18-2016, 02:47 PM   #6
Senior Member
oldsmasma's Avatar
Join Date: Jul 2013
Posts: 271
Not the help you are looking for - but I wanted to compliment you on digging in and learning about how your TT is built and making it better. I have watched DH tear out and completely rebuild the back corner of an old Motorhome we owned years ago and saw how great the outcome was. We gave our son and daughter-in-law an older MH last Christmas and between their skills they have made a great little unit. He is a mechanic and has gone over the mechanical parts of it from end to end and it now runs like new. She has ripped torn painted upholstered and sewn the interior and it's a doll house. Keep flexing those DIY muscles and you will save a LOT of money.

Phil, Heather & Olaf the Boxer
Ontario Canada
Lexington 283GTS
nights camped 2015-89
2016 - 31
oldsmasma is offline   Reply With Quote
Old 09-18-2016, 03:35 PM   #7
Senior Member
Blackhat6mike's Avatar
Join Date: Dec 2014
Location: St Simons Island, GA
Posts: 1,099
Send a message via Skype™ to Blackhat6mike
Most hardware stores have braided water lines of various lengths that will fit your connections. I use one that is long enough to form a loop behind the toilet so I could install a sprayer "T" in the line and not stress the pex fittings. They come in different size connections, so make sure you know what size you need or take the fitting off and take it with you to the store. The braided lines are mostly used to connect household toilets to their water shutoff valves. They are not expensive.
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP
Blackhat6mike is offline   Reply With Quote
Old 09-18-2016, 03:53 PM   #8
Join Date: Nov 2015
Posts: 37
This is a great opportunity to install a shut off valve for any repair of the new toilet or to isolate to save water while boon-docking and use alternative water source for flushing
Danesville is offline   Reply With Quote
Old 09-18-2016, 11:43 PM   #9
Senior Member
Join Date: Feb 2014
Posts: 111
Your water supply line comes from under the shower base into a 3" x 3" L-shaped box built against the wall behind the toilet. Pull the toilet and remove the box to access the line. You will have plenty of room to cut the line back a few inches to accomodate a sharkbite coupling and a extension to the pex pipe.

Adapt the box as required and re-install.

As to your flange adaption, I would suggest you completely seal around the outside of the new flange extension where it enters the old flange to prevent sewer gas/odor from entering the bathroom from under the toilet. The wax seal might not block it completely.

Henboy is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:45 AM.