Thread Tools Display Modes
Old 05-25-2014, 11:49 AM   #1
Junior Member
Join Date: Apr 2014
Location: C. Cove, Texas
Posts: 10
Odor in bathroom from Black Tank .....

I have been told by the DW ask for help concerning the odor in our bathroom that seems to be coming from the black tank. Is this even possible first of all? Secondly what do I need to do to get rid of it? This has now become my top priority according to my sweet DW !

jimtaylor is offline   Reply With Quote
Old 05-25-2014, 11:53 AM   #2
Senior Member
fonzie's Avatar
Join Date: Sep 2010
Location: Eastern Ontario
Posts: 2,796
If you have a Dometic model 300 toilet it might be the problem, read thread below....

Dometic model 300 odor problem and replacement

2011 Rockwood 8319SS with ProPride 3P hitch/GoodYear Marathons/TST TPMS 507
2008 F250 Lariat CC SB 6.8L V10 4.10 axle ratio (NITTO TERRA GRAPLER G2 LT275/65R20E)
Yamaha 3000iseb generator:Progressive Ind. EMS-HW30C : Eastern Ontario
Nights Camped: 2011(21) 2012(36) 2013 (17) 2014 (18) 2015 (18) 2016 (36)
fonzie is offline   Reply With Quote
Old 05-25-2014, 11:57 AM   #3
Senior Member
Ford Idaho's Avatar
Join Date: Sep 2013
Location: Idaho
Posts: 9,030
Are you using a tank treatment with odor control?

Are you putting some water in the bowl after use?
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
Ford Idaho is offline   Reply With Quote
Old 05-25-2014, 11:59 AM   #4
Ret E-9 Anchor-clanker
donanddona's Avatar
Join Date: Jul 2012
Location: Genoa, ILL
Posts: 1,201
What type of deodorizer are you using, how hot is it there, how often do you dump and flush? These are just some of the questions that could cause your order. O yea, what about that bathroom vent?
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going
donanddona is offline   Reply With Quote
Old 05-25-2014, 02:01 PM   #5
Denver, CO
garbonz's Avatar
Join Date: Jan 2013
Location: Denver, CO
Posts: 1,880
Also, never run the vent fan when using the loo, it sucks the putrid smell out of the tank. Wait till yer done and then turn the vent on.
2007 Chevy 2500HD Classic LBZ Duramax/Allison (Stock)
2005 Bigfoot 1500C8.2 AWESOME
garbonz is offline   Reply With Quote
Old 05-25-2014, 11:10 PM   #6
Boss Ox & Drovergirl
oxcamper's Avatar
Join Date: Feb 2014
Location: N.E. Ohio Snow Belt
Posts: 618
We too are getting ordor in our 282rk. But it's not confined to just the bathroom. The 282 has a dresser bureau on the other side of the bathroom wall of the toilet and when you open the drawers, the odor is there also, as well as in the cabinet under the sink.
Could it be the toilet seal going into the black tank wafting up odors into the underbelly space and seeping out at the hole for the hose, vent pipes etc?

I've read on other posts that Dometic 300s are being replaced by the manufacturer as defective.
Mark, Vicki, & Scout THE dog
2015 Hemisphere 282RK
2010 F250 Super Duty
1992 Goldwing Aspencade
oxcamper is offline   Reply With Quote
Old 05-26-2014, 12:02 AM   #7
Senior Member
Join Date: Jul 2013
Location: Roxboro, NC
Posts: 267
check the vents on the roof are the open. You can also install the vents that spin into the wind to make sure if the air is blowing hard it is not blowing into the tank.

Sent from my SCH-I545 using Forest River Forums mobile app
2007 GMC 2500 Duramax Crew Cab LB
2008 5th Wheel Cardinal 36LE
R Whitlow is offline   Reply With Quote
Old 05-26-2014, 03:39 AM   #8
Site Team - Lou
Herk7769's Avatar
Join Date: Oct 2009
Location: South Eastern PA
Posts: 19,826
Dealing with odors.

1) Found a dish cloth under sink in kitchen that turned into a science project.

2) Traveling sloshed water out of the shower trap allowing odors from the gray tank to permeate the bathroom. Troubleshot toilet for hours before a member suggested it might be decaying food from gray tank. Filled trap and problem went away.

3) Poo under ball/flap valve but above the tank. Turbo flush will not clean this. Used flush Wand and a shaped toilet bowl brush to clean best I can during winterizing. Worst case; remove and pressure wash.


Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
Herk7769 is offline   Reply With Quote
Old 05-26-2014, 04:55 AM   #9
Senior Member
Join Date: Jan 2013
Location: Berryville, Arkansas
Posts: 591
I had a problem with another camper and tried all kinds of things. Finally, I got one of these.
It pulls just enough of a suction on the vent pipe so that you never get any odor through the toilet. I could even run the bathroom fan when flushing and not have any odors escape. DW was finally happy!

2012 CC 36CKTS Touring Edition
2015 Ford F-350 CC DRW Lariat
Joe_GA is offline   Reply With Quote
Old 05-26-2014, 05:37 AM   #10
Junior Member
Join Date: Apr 2014
Location: C. Cove, Texas
Posts: 10
Thanks everyone for the input .... the latest is I washed out the Black tank until water was completely clear coming out of the tank ...... We put the deodorizer in as we have since we got the trailer, we keep a small amount of water in the bowl ........was for sure that this would solve the issue but nope, still have the odor. Man this really bites, a brand new trailer should not have an odor coming from the toilet .

jimtaylor is offline   Reply With Quote

black, black tank, roo, tank

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 04:03 AM.