RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 11-25-2020, 10:16 AM   #1
Member
 
RVElzes's Avatar


 
Tiffin Owners Club
Ford Super Duty Owner
RV Trip Wizard
Join Date: Oct 2019
Location: Full Time Nomads
Posts: 36
Question Sewer odor from sinks

We are full timers and have just finished a two year, 48 State adventure. I mention this simply to offer information that our motor home has not sat still (storage) and has been in constant use in all that time. About a month ago we arrived at our snowbird location. We have not moved since then and will not be moving until at least the beginning of April. Recently we have noticed a sewer odor from our sinks only when running water. The smell stops once we shut the water off. We are looking for suggestions how to really cleanse the grey tank now that we are not moving. While constantly on the move we would simply add products to the grey tank and let the agitation from driving slosh around to thoroughly clean the grey tank. TIA
__________________
Michael, Linda & Indy
2019 Tiffin Open Road Allegro 34PA
2012 Jeep, Blue Ox/Patriot II
RVElzes 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 11-25-2020, 10:39 AM   #2
Senior Member
 
Join Date: Apr 2020
Posts: 1,212
Blog Entries: 1
Are you sure it's coming from the traps, or could it be the water itself?
__________________
2006 Damon Daybreak 3276 35'. 3 200 Amp Lithium batteries and 2000 watt Pure wave inverter/charger.
2013 Elantra on a Master Tow dolly.
HarryStone is offline   Reply With Quote
Old 11-25-2020, 11:07 AM   #3
Senior Member
 
Ljwt330's Avatar
 
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 2,609
If not the water itself, there are two possibilities. First, the p-trap itself may be fouled. You certainly have water in the traps since you constantly use them, but the trap may have accumulated residue that is causing the odor.

Second, it could be from the Air Admittance Valves (AAV) which are located on the lines from each sink, after the p-trap. They are a simple check-valve that allows air to be drawn into the drain line as water rushes toward the tank, preventing a vacuum.
If there is no negative pressure in the line, the valve closes off. If the valves are faulty and fail to seal properly, they will allow odor to escape from the line to the tank, back into the area under the sink.

If the odor is at all sinks, double check the water supply odor, as suggested, especially the hot water. High sulfur or other mineral deposits can cause foul odors within the water heater. If the water supply is odor-free, track down and test the AAVs.
__________________
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
Ljwt330 is offline   Reply With Quote
Old 11-25-2020, 01:09 PM   #4
Junior Member
 
Join Date: Oct 2020
Posts: 9
Quote:
Originally Posted by RVElzes View Post
We are full timers and have just finished a two year, 48 State adventure. I mention this simply to offer information that our motor home has not sat still (storage) and has been in constant use in all that time. About a month ago we arrived at our snowbird location. We have not moved since then and will not be moving until at least the beginning of April. Recently we have noticed a sewer odor from our sinks only when running water. The smell stops once we shut the water off. We are looking for suggestions how to really cleanse the grey tank now that we are not moving. While constantly on the move we would simply add products to the grey tank and let the agitation from driving slosh around to thoroughly clean the grey tank. TIA
I'm assuming you guys are hooked to the sewer dump and have the grey water valve open. Correct? If so, did you make a p-trap in your sewer hose to prevent gases from coming back up though the hose?
CivEngPE is offline   Reply With Quote
Old 11-25-2020, 01:13 PM   #5
Senior Member
 
Fred and Bonnie's Avatar
 
Workhorse Chassis Owner
Join Date: Jan 2002
Location: Pacific Northwest or SoCal
Posts: 3,015
Send a message via ICQ to Fred and Bonnie
When we experience that, I add sewer treatment in the kitchen sink, problem solved.

Fred
__________________
Fred and Bonnie
2005 Dolphin LX 6375
Abby, Ruffles & Scarlett, "The Cats"
Fred and Bonnie is offline   Reply With Quote
Old 11-25-2020, 01:38 PM   #6
Member
 
RVElzes's Avatar


 
Tiffin Owners Club
Ford Super Duty Owner
RV Trip Wizard
Join Date: Oct 2019
Location: Full Time Nomads
Posts: 36
Quote:
Originally Posted by CivEngPE View Post
I'm assuming you guys are hooked to the sewer dump and have the grey water valve open. Correct? If so, did you make a p-trap in your sewer hose to prevent gases from coming back up though the hose?
Yes, we are connected to the campgrounds sewer. Yes, we have left the grey water gate valve open. And no, we did not make a P-trap in our sewer slinky. Didn't even think about that. An easy enough thing to try to eliminate the odor. Thanks!
__________________
Michael, Linda & Indy
2019 Tiffin Open Road Allegro 34PA
2012 Jeep, Blue Ox/Patriot II
RVElzes is offline   Reply With Quote
Old 11-26-2020, 11:34 AM   #7
Senior Member
 
Ljwt330's Avatar
 
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 2,609
Quote:
Originally Posted by RVElzes View Post
Yes, we are connected to the campgrounds sewer. Yes, we have left the grey water gate valve open. And no, we did not make a P-trap in our sewer slinky. Didn't even think about that. An easy enough thing to try to eliminate the odor. Thanks!
This step should make no difference^^.

Leaving the gate valve open to the sewer dump only allows those odors to enter your grey tank and its connected plumbing. Your problem is odor entering your coach from your grey tank and its plumbing, not the "degree of stink" inside your grey tank. You have a "leak" somewhere in your drain plumbing or venting, either from a connection, AAVs, or p-traps.

Any odors from your open sewer connection should be vented out the roof vent of the coach. Using the sinks and adding water into the grey tank may be agitating the foul air inside the tank, forcing more odors out the roof vent and you are smelling that. Or, the agitated odors are coming from a leak somewhere in the plumbing, as mentioned, and you notice it because it is so much more foul than normal grey tank smell.
__________________
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
Ljwt330 is offline   Reply With Quote
Old 11-26-2020, 12:17 PM   #8
Senior Member
 
TexasTom's Avatar


 
Newmar Owners Club
Fleetwood Owners Club
Join Date: Jul 2013
Location: DFW
Posts: 1,358
Had the same problem. Solved it with this for my coach.

https://www.amazon.com/Camco-40597-B...6414650&sr=8-2
__________________
2009 Fleetwood Excursion 40E
TexasTom is offline   Reply With Quote
Old 11-26-2020, 07:50 PM   #9
Senior Member
 
Rocky Larson's Avatar
 
Workhorse Chassis Owner
Join Date: Aug 2007
Posts: 837
https://www.winsupplyinc.com/jones-s...s/_/A-01116435

There should be one under each sink. Easy screw off and on. One or two winds of pipe tape.
I have found them at Ace, HD, Menards, etc.

There are several styles so yours may look different but should be on a vertical pipe higher than the trap.

Good Luck
__________________
Jan and Rocky
Volunteers USFWS. 8500 hrs each, 28 refuges. 04 Allegro 30DA, WH 8.1, Banks, 2012 Jeep Liberty , Brake Buddy Adv Select, 300watts Solar, "Philippians 4:11-13 KJV"
Rocky Larson is offline   Reply With Quote
Old 11-27-2020, 07:41 AM   #10
Senior Member
 
bddadles's Avatar
 
Join Date: Feb 2017
Location: Full Timing. When I park I'm home
Posts: 1,130
A quick test for the AAV is to wrap it with duct tape and see if the odor stops.
__________________
2004 Volvo, 2009 smart car
2008 Hitch Hiker Champagne
Full timing since 2009
bddadles is offline   Reply With Quote
Old 11-30-2020, 03:47 PM   #11
Senior Member
 
Randy125's Avatar
 
Newmar Owners Club
Join Date: Dec 2011
Posts: 541
I had a friend that his hot water heater emitted a foul smell while using, might see if the smell is present while isolating the hot and cold water.
__________________
2002 KSDP 3669/Freightliner XC CHASSIS/Cummins 5.9 ISB 300hp
Joplin, MO
Randy125 is offline   Reply With Quote
Reply

Tags
odor, sink



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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mold Odor/Musty Odor sdesha Entegra Owner's Forum 14 04-08-2020 07:45 AM
Sewer odor problems solved BillyC Monaco Owner's Forum 30 02-20-2011 05:46 PM
Sewer odor in Coach solved johnwr Alpine Coach Owner's Forum 0 07-11-2009 10:31 PM
Sewer Odor gator67 Alpine Coach Owner's Forum 17 10-02-2007 07:25 PM
sewer odor ruining good times LKS RV Systems & Appliances 10 07-29-2005 12:01 AM


All times are GMT -6. The time now is 07:11 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.