Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 07-30-2012, 01:27 AM   #1
Senior Member
frazierdee's Avatar
Join Date: Jul 2012
Posts: 114
Sewer Smell in Coach

We have a 2000 Monaco LaPalma, just had it a couple of weeks. We have just begun to notice a slight sewer smell inside the coach. I thihk we've been doing the right things with emptying the black water. And I put another scoop of the anti-odor stuff in the toilet. I think I remember reading someplace about what can cause oder, but now I can't find the article(s).
Thank for any advice,

frazierdee is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-30-2012, 01:41 AM   #2
Senior Member
windydaboo's Avatar
Florida Cooters Club
Fleetwood Owners Club
Coastal Campers
Freightliner Owners Club
Join Date: Apr 2010
Location: All over the place
Posts: 237
Try using liquid laundry detergent and/or fabric softener, many on here say it works for them. Also may try dumping the tank when you first arrive at a CG and then fill the tank with fresh water and add a healthy amount of bleach to disinfect, then drain after 20 mins or so. Also check your roof vent for any obstructions. As for the cause of the smell, it's poop.

'97 Fleetwood Discovery 36RS
'01 Road Star Midnight Star Edition '77 CJ-7 factory V8
'69 1600 VW Sand Rail '09 EZGO RXV Custom Golf Cart
windydaboo is offline   Reply With Quote
Old 07-30-2012, 01:47 AM   #3
Senior Member
Abnmarine's Avatar
Join Date: Sep 2009
Location: Colorado
Posts: 634
Two things that I would look at are the toilet seal and the roof vent to the black tank.
2016 Dodge Ram 2500 Laramie 6.7 CTD, 45 gallon gravity tank, Cooper A/T3's, Bilstiens
2012 Arctic Fox 22H 300 watt Solar, Morningstar TS-45, 460 AH batteries, Xantrax 1000 watt PSW
Abnmarine is offline   Reply With Quote
Old 07-30-2012, 02:57 AM   #4
RVM 18
okmunky's Avatar

Solo Rvers Club
iRV2 No Limits Club
Join Date: Feb 2011
Location: Fulltimer, SD resident
Posts: 5,108
I had a similar issue, but found a cure. My toilet will not seal unless I slide my foot off the pedal and allow it to snap back. I then add water to the toilet by lifting the flush pedal with my foot. If the water drains out, I try again.
Barb (RVM18), Sena (capuchin monkey, RVM Head Mascot) & Lily (Maltese/Yorkie)
2011 Shasta Cynara 230F & 2012 Smart Car toad, 272 watt solar system
The Journey is Our Destination. Full-timing since 5/18/2011 and loving it.
okmunky is online now   Reply With Quote
Old 07-30-2012, 03:38 AM   #5
Senior Member
Join Date: Jan 2011
Location: Debary Fl
Posts: 464
Couple of things, after you have been on the road the water will shake out of the traps on the sinks and shower, sometimes allowing the smell back in the coach, or if your coach has been parked awhile the water will evaporate. Try running a little water in the drains. Also most plumbing systems have vacuum breakers in the vent/drain lines, if one of those get stuck open stink will happen. They are usually located hear the sink drain plumbing in the bathroom or kitchen. Additionally running with the bathroom roof vent open and a window cracked will sometimes cause negitive pressure and pull the smell in.
Bruce Linda and Zoey
1999 ForeTravel U295
012 orange Jeep Wrangler
bbeane is offline   Reply With Quote
Old 07-30-2012, 04:21 AM   #6
Senior Member
Join Date: Mar 2011
Posts: 2,454
Blog Entries: 2
On my previous coach I found a leak in the black water tank allowing liquid to settle under the tank and the smell came up into the bathroom. Leak fixed, washed out under the tank with soap and water, smell gone.
TheArnolds is offline   Reply With Quote
Old 07-30-2012, 04:37 AM   #7
Senior Member
H. Miller's Avatar
Monaco Owners Club
Texas Boomers Club
Join Date: Jan 2009
Posts: 2,516
Plumbed for a washer?? Put a piece of tape over the water drain.
Hal & Ginny Miller '04 Beaver Santiam PRT40
'04 Saturn Vue - US Gear Brake - Blue Ox tow
4 "girls" (3 Irish Setters - Retriever)
H. Miller is offline   Reply With Quote
Old 07-30-2012, 04:50 AM   #8
Junior Member
Join Date: Jul 2012
Location: Michigan
Posts: 14
I had a similar problem and when I checked the roof vent cap I found a very large wasp nest under the cap. Removed that and no more smell.
Mark, Marilyn and Kobi
2004 Sightseer 30B, Ford V10, F53
mlb4e is offline   Reply With Quote
Old 07-30-2012, 10:03 AM   #9
Senior Member
chasmatt's Avatar
National RV Owners Club
Freightliner Owners Club
Join Date: Jan 2011
Location: Liberty Lake, WA
Posts: 107
Check the vacuum breakers - especially the one on the back of the toilet. The seal on the vacuum breakers will get brittle with age. Changing vacuum breakers (3 in our coach), and vent cap (went to a venturi type) fixed our sewer odor problem.
Charlie & Mernie Matthews
Liberty Lake, WA
2014 Columbus 365RL Fifth Wheel
chasmatt is offline   Reply With Quote
Old 07-30-2012, 10:31 AM   #10
Senior Member
frazierdee's Avatar
Join Date: Jul 2012
Posts: 114
Thanks again

How in the world did people get along without the internet? Just kidding - sort of - I am 64 and know how we did it. But it is SO EASY and WONDERFUL these days. Thanks for all the quick responses and advice. We will check out all the suggestions.
frazierdee is offline   Reply With Quote
Old 07-30-2012, 01:17 PM   #11
Senior Member
Country Coach Owners Club
Join Date: Jan 2006
Location: Sacramento Area
Posts: 3,229
Run a rinse load in your washer machine to fill the p trap.
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
deandec is offline   Reply With Quote
Old 07-31-2012, 05:01 AM   #12
Senior Member
Join Date: Sep 2009
Posts: 180
Get a Cyclone vent at Camping World, about $20.00 for the black water vent on the roof. It fixes the problem.
bjsheldon is offline   Reply With Quote
Old 07-31-2012, 05:44 AM   #13
Senior Member
tims52ford's Avatar
National RV Owners Club
Nor'easters Club
Join Date: Jul 2008
Location: Pawtucket, Rhode Island
Posts: 203
Had the same problem, removed the OEM vents and installed cyclone vents, no more problems.
tims52ford is offline   Reply With Quote
Old 07-31-2012, 11:59 AM   #14
Senior Member
Workhorse Chassis Owner
Join Date: Nov 2009
Posts: 125
I use the GEO system. Easy to do and it works !! Also have a cyclone.


Joyce, Milt 2000 Safari Trek 2830
Kettle Falls, Wa
popsuscdds is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

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 -6. The time now is 02:56 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.