โFeb-13-2023 06:16 AM
โFeb-15-2023 05:52 AM
dougrainer wrote:
Everybody assumes it is Black odor. Maybe, but after 44 years as a RV tech, most of the time it is Gray tank odor. Most people(SMART people) use a Black tank Deodorizer and break down chemical. Very few use a Gray tank chemical. What I do is dump and flush BOTH tanks. Then I install Pine Sol(about a quart) in the GRAY tank and then drive the RV. IF you get Pine sol odor, then you have a Gray tank problem.
dougrainer wrote:
1. IF prepped for a washer Dryer, odds are the P trap has NO water and that is the source.
dougrainer wrote:
2. Air admittance valves Install a plastic baggy over them and test, OR just replace they do not cost much
dougrainer wrote:
3. The down pipe for both the black and gray may not be sealed or installed to the top of the tank. To check fill both tanks to over full. Water coming up into the toilet bowl and water coming up into the shower pan, IF you get water flowing out off the top of the tanks, that is your leak.
dougrainer wrote:
4. The roof top tank vents, make SURE the 1.5 inch ABS pipe extends ABOVE the roof line and the pipe is sealed where it comes thru the roof. VERY COMMON
dougrainer wrote:
PS, IF a Black tank odor, the Flange rubber seal may be worn and bad.
โFeb-15-2023 05:38 AM
โFeb-14-2023 07:17 PM
โFeb-14-2023 07:08 PM
dougrainer wrote:
3. The down pipe for both the black and gray may not be sealed or installed to the top of the tank.
โFeb-14-2023 11:02 AM
โFeb-14-2023 06:35 AM
โFeb-14-2023 06:09 AM
โFeb-14-2023 05:43 AM
Grit dog wrote:
^Bingo. Or black vs gray smell is typically totally discernible to all but the most oblivious sewer dumper. Lol
Does it happen all the time or only if traveling with partially to very full black tank?
Only had 3 โRVsโ now but all of them were the same, both older and fairly new units. If black tank was fairly full and weโd travel a distance, like any sustained highway driving, the black tank odor would come into the camper.
Not the P traps or gray.
And no other odor issues.
Seal around bottom of toilet like mentioned recently could be it.
My solution was to dump what I hoped I could have dumped 100miles sooner, lol.
โFeb-14-2023 05:38 AM
RLS7201 wrote:
If the Air Admittance Vent doesn't fix your issue. There is another possible reason for the stink inside your RV. When going down the road, the inside of the RV goes into a negative pressure, caused by the large flat area in the rear. This allows the pressure differential to induce a stink in the RV. I replace the caps on the roof vents with sanitary Ts, to put the tanks into the same pressure as the inside of our MH. Or you can purchase the rotating roof vents. Rotating roof vents.
Richard
โFeb-14-2023 05:34 AM
MFL wrote:enblethen wrote:
Water sucked out of drain traps
No water in drain traps
Vent under washroom sink stuck open, if equipped. air admittance style vent
I agree, it doesn't sound like the black tank could be the issue.
Easy to fill drain traps, including sinks and shower, when stopped. Does smell go away?
Jerry
โFeb-14-2023 05:32 AM
opnspaces wrote:
Yes probably an air admittance vent AKA cheater valve the is not longer a one-way valve. Available at Lowes or Home Depot for around $10
โFeb-14-2023 05:31 AM
enblethen wrote:
Water sucked out of drain traps
No water in drain traps
Vent under washroom sink stuck open, if equipped. air admittance style vent
โFeb-13-2023 10:34 AM
โFeb-13-2023 10:20 AM