Thread Tools Display Modes
Old 05-15-2019, 07:38 AM   #1
Join Date: Oct 2018
Posts: 83
Toilet won’t hold water.

About 1/2 the time, the water I add to the toilet bowl after use to insure a good “smell barrier” leaks down. When time for next use, the bowl is dry.

I bought some toilet sel conditioner, but didn’t,t solve it.

This is a 2918 2501TS so the seal should be good. Any ideas?


RHOUSER is offline   Reply With Quote
Old 05-15-2019, 07:47 AM   #2
Senior Member
bubbles's Avatar
Join Date: Dec 2012
Posts: 4,027
What model toilet do you have?

bubbles is offline   Reply With Quote
Old 05-15-2019, 07:56 AM   #3
PPST Wannabe
kenandterry's Avatar
Join Date: Sep 2010
Location: Prince Edward County, Ontario, Canada
Posts: 3,018
Please realize that Forest River doesn’t make everything in your rig. Just like the other RV brands, a number of components are used in the building of the rig.

In this case, like a Bubbles asked, we need to know what make and model of toilet you have. Probably Thetford or Dometic, but only you can tell us for sure.

Ken and Terry
2010 Georgetown 330TS being pushed by our
2017 GMC Terrain toad (4 wheels down)
kenandterry is offline   Reply With Quote
Old 05-15-2019, 08:00 AM   #4
Senior Member
Join Date: Mar 2012
Posts: 479
I'm not sure which toilet you have, but if it is like the one in our rig, there is only one way to fix it. We have to let the foot pedal slam shut. Works every time once we figured it out.
houstonstroker is offline   Reply With Quote
Old 05-15-2019, 08:14 AM   #5
Usually Confused Member
emm-dee's Avatar
Join Date: Nov 2015
Location: Georgia
Posts: 2,664
Not an uncommon problem. There are numerous reasons with the most common one being the seal dried out before delivery. It’s irrelevant why because the fix is so easy. Mine was leaking down at delivery and I finally got around to replacing it last month.

Here’s the part you need:

Unscrew the main water line at the back of the toilet. Remove two nuts at the bottom and then take the whole assembly to an area where you have room to work. With the toilet upside down you’ll find two screws which lock the top and bottom parts together. Get a firm hold on the bottom and rotate the top about 10 degrees and the parts will separate. You’ll then see the seal so you can replace it. The instructions in the repair parts bag have pictures of the process.

In the meantime, after you flush the toilet push the operating lever about half way down, or more, and then release it so it will “slam” closed. Then, a gentle push on the lever will let water in without opening the seal.

By the sure to shut off the water pump or outside water source before starting this project. Don’t ask me why I know about that.
2018 Forester 3051S (aka Clyde)
2015 Wrangler Toad (aka Bonnie)

At some point during every day you suddenly realize nothing else productive is going to happen the rest of that day. For me, it usually occurs around 9 am.
emm-dee is offline   Reply With Quote
Old 05-15-2019, 08:31 AM   #6
Senior Member
Join Date: Dec 2017
Posts: 680
My 2018 rig has the ball seal and for no reason started draining.

I held the foot pedal down cleaned the seal then lubed it with plumbers silicone grease. It’s been more than a year and still good.
2016 RAM 3500 DRW 4x4 LB LoneStar Edition, w/Timbrens, Andersen Ultimate 2, Swift Hitch SH04 WiFi Backup/Rear View Camera
2018 Chaparral 360IBL w/Tireminder SMART TPMS, Furrion Wireless Observation System, Progressive EMS-HW50C
Prior Rig: 2006 RAM 3500 DRW LoneStar Edition
2011 Starcraft 392BHU w/Andersen No-Sway hitch
chaps2018 is offline   Reply With Quote
Old 05-15-2019, 08:39 AM   #7
Senior Member
Join Date: Jan 2015
Location: eastern NC
Posts: 1,436
ours started leaking like that and turned out to be this, ... the piece that opens and closes with the action of the foot pedal has an "arm" on each side down inside the chute, you have to open it to see them down the pipe, ... the left side arm had become dislodged out of its socket, causing that side to not have as strong a seal when it was closed , so the water would leak past the seal and empty the bowl, ... can easily happen if using a toilet brush to clean down in that area and not knowing those are there, ... just had to reach down into the chute and put it back into it's socket, ...

fella10 is offline   Reply With Quote
Old 05-15-2019, 09:03 AM   #8
Prime Member
Join Date: Apr 2016
Location: About 30 miles west of Beantown.
Posts: 3,261
After I release the flush pedal, I push up on it ever so slightly.

2016 Coachmen Freedom Express Liberty Edition 310BHDS
2013 Chevy Silverado 2500HD LTZ 6.6L V8 Duramax
Husky weight distribution hitch with sway control
timfromma is offline   Reply With Quote
Old 05-15-2019, 09:12 AM   #9
Senior Member
Join Date: Aug 2017
Posts: 127
keep the valve surfaces clean and lubed. It takes only a particle of waste to allow the water to leak out of the bowl. I use silicone spray, but other products will work and probably smell better
AZ Pete is offline   Reply With Quote
Old 05-15-2019, 09:15 AM   #10
Senior Member
ben31's Avatar
Join Date: Apr 2015
Location: Middle GA
Posts: 1,254
The plumber's silicone grease works wonders. Even if it doesn't leak, it is a good idea to periodically put some on the seal. It will help the seal last a lot longer. BTW, I'd suggest using disposable gloves, while applying it!

Turn off the water. Open the flush valve and then apply the grease to the seal (top and bottom). Done.

Ben and Doreen
Home Away From Home - 2017 PT Crusader 315RST
TV - 2008 F250 Lariat SuperCrew 4X4 6.4 Diesel
Never Enough Time Camping!!
ben31 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

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:48 AM.