Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 12-08-2018, 04:55 PM   #1
Member
 
Brand: Thor Motor Coach
Model: Challenger 35MQ
State: Florida
Posts: 45
THOR #12430
Strong Black Tank Odor Inside When Backflushing

When I dump my black tank and then backflush it a few times there is a very strong black tank odor inside the RV. What could be causing this and where can I look to troubleshoot? We never experience any odors otherwise even if the black tank is half full for weeks without being dumped. I use the Valterra Flush King to backflush.
__________________

__________________
wdconnors is offline   Reply With Quote
Old 12-08-2018, 06:17 PM   #2
I Think We're Lost!
 
Bob Denman's Avatar
 
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 11,240
THOR #8860
Two east places to check: the toilet and bathroom sink drains...
Dies the toilet seem to hold just a little bit of water over the valve that allows it to dump? Or does it usually seem to be dry?
If the latter is the case: there's your culprit!
The sink should have some sort of check valve in place to prevent odors from coming up from the tank. See if it is moving properly, and not stuck open.

Good luck!
__________________

__________________
Good Sam Member 843599689
FMCA Member F473304

Current coach: Tiffin Wayfarer 24 BW
Former coach: Thor Outlaw 29-H
Bob Denman is offline   Reply With Quote
Old 12-08-2018, 10:44 PM   #3
Axis/Vegas Enthusiast
 
JamieGeek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 8,135
THOR #1150
The check valve for the sink will be in the cabinet and is called an "air admittance valve". It should only allow air into the tank and not out. Many times these aren't screwed on tight or are bad.
__________________
2014 Thor Axis 24.1
2018 Chevy Bolt
blog - https://spareelectrons.wordpress.com/
JamieGeek is offline   Reply With Quote
Reply

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

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 03:39 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×