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08-10-2019, 08:45 PM
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#21
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 795
THOR #4488
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No I didn't think of it at the time. But if you can imagine one PVC pipe inside the other, that's what it looks like. I only noticed it on rare occasions and first thought I had a toilet gasket leaking fumes from the black water tank.
Quote:
Originally Posted by Golfbum18
DId you happen to snap any pics while you had the cap off to show what you did??
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08-10-2019, 08:46 PM
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#22
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Senior Member
Brand: Thor Motor Coach
Model: Gemini 23TR
State: California
Posts: 981
THOR #6701
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One other item I do not see mentioned. Plugging the bathroom sink while traveling. Many rv bathroom sinks drain into the black tank. If the goose neck drys up from jarring around or drys from evaporation oder can come from the sink drain. I try to remember to put the plug in and add some water above for a good seal.
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2017 Gemini 23TR Ford chassis w/ power stroke 3.2
DW, Daughter and 2 dogs, Sofie (black lab/boxer) and Phoebe (schnoodle)
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08-10-2019, 10:53 PM
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#23
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Senior Member
Brand: Thor Motor Coach
Model: Vegas 25.5
State: Florida
Posts: 278
THOR #12686
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Quote:
Originally Posted by Metalman
Over the years we've had problems with black water tank smell at times.
Things that we found to contribute to the smell are: - Full black water tank.
- Back water tank left too long without emptying
- High ambient temperature
- Only one application of odor eliminating chemical
- Driving with the front windows open
- Bad seal (no water) in the toilet
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yep, I had a bad seal in the toilet. I got a polar bear to chase it off.
Sorry Metalman, I just couldn't let that one go by.
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Mike & Diane
2018 Thor Vegas 25.5
2017 Jeep Wrangler Unlimited
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08-10-2019, 10:56 PM
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#24
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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08-11-2019, 12:19 AM
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#25
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 34J
State: Florida
Posts: 159
THOR #15745
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Check and see if your roof vent is possibly closing in the heat. I replaced mine me with a 360 siphon. Depending on what year you have they come standard on the new ones.
I use ODORLOSS tank treatment in both black and gray tanks. Absolutely minimal smell even when you have exhaust fan on in bathroom.
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08-11-2019, 12:20 AM
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#26
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Senior Member
Brand: Thor Motor Coach
Model: Windsport 27K
State: Kentucky
Posts: 881
THOR #2817
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Quote:
Originally Posted by pavemike
yep, I had a bad seal in the toilet. I got a polar bear to chase it off.
Sorry Metalman, I just couldn't let that one go by.
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Ruff ruff....
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08-11-2019, 12:25 AM
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#27
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Junior Member
Brand: Thor Motor Coach
State: Michigan
Posts: 14
THOR #4885
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We had a smell from our shower drain. We didn't use it for a while and the water evaporated out. As we drove the smell came in the RV.
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08-11-2019, 12:55 AM
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#28
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Senior Member
Brand: Thor Motor Coach
Model: Windsport 27K
State: Kentucky
Posts: 881
THOR #2817
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Quote:
Originally Posted by climberbob
We had a smell from our shower drain. We didn't use it for a while and the water evaporated out. As we drove the smell came in the RV.
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Perhaps pouring a bit of RV antifreeze in the trap before you store it for long periods of time would slow down the evaporation.
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08-11-2019, 01:00 AM
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#29
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Junior Member
Brand: Thor Motor Coach
State: California
Posts: 9
THOR #12613
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Fixed same problem
Valve under bath sink very lose. Thanks!
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08-13-2019, 01:58 AM
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#30
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Senior Member
Brand: Thor Motor Coach
Model: Hurricane 31D
State: Virginia
Posts: 137
THOR #5638
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Quote:
Originally Posted by Miramar Owner
I found my issue was simple to fix...difficult to find. It was suggested by Thor customer service to get on the roof, remove the vent cap and check the space between the vent pipe and the outer tube that contains the pipe. I found there to be no sealant between the two. Occasionally the black tank fumes would flow back down between the 2 pipes and get into the coach. I filled the gap with silicone caulk and have had no further problems.
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Should look something like this (my resealing but there should be something). And check the gray tank vent also. That tank can be just as smelly sometimes.
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2006 Hurricane 31D built on a 2006 Ford F53
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08-13-2019, 03:57 PM
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#31
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Senior Member
Brand: Thor Motor Coach
Model: Thor Hurricane 29M
State: Florida
Posts: 358
THOR #9033
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Quote:
Originally Posted by Miramar Owner
No I didn't think of it at the time. But if you can imagine one PVC pipe inside the other, that's what it looks like. I only noticed it on rare occasions and first thought I had a toilet gasket leaking fumes from the black water tank.
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And you fill the empty space between the two with caulk?
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08-13-2019, 04:10 PM
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#32
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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The sealant is just to keep water from getting in and under the top plate that goes around the vent.
Any gaps that are underneath that plate: shouldn't matter.
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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08-19-2019, 12:57 AM
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#33
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Senior Member
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 795
THOR #4488
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My Miramar may be different, but the vent pipe was actally inside the outer pipe you show in the picture. The sealant between the 2 pipes was missing allowing odors to sometimes get into the cavity in the wall. Thor customer service is who pointed this out to me.
Quote:
Originally Posted by Bob Denman
The sealant is just to keep water from getting in and under the top plate that goes around the vent.
Any gaps that are underneath that plate: shouldn't matter.
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08-19-2019, 11:01 AM
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#34
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Quote:
Originally Posted by CyRE
Valve under bath sink very lose. Thanks!
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Glad to hear that you found and fixed it!
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