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 > Good thing bad thing

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south

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Posted: 12/09/19 12:52pm Link  |  Quote  |  Print  |  Notify Moderator

We all know not to run a vent fan when flushing the toilet..unless a window is open and maybe not then.
We've encountered some sewer systems wit a positive air pressure, usually those that are just tanks that have t be pumped every little bit.
We are on a normal hookup with n problems. The pipes etc are all good.
Never notice this before but with the vent fan on and gray tank open we were getting sewer smell. Hadn't been leaving a window partially open because it had been rather cold.
Nice to know the coach pert neer air tight...but gonna have a window a bit even if it is raining cat and dogs.

Lynnmor

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Posted: 12/09/19 01:07pm Link  |  Quote  |  Print  |  Notify Moderator

Check to see it the smell is coming from the air admittance valve usually located under the sink(s). Replace with a good one from a home improvement store. I wouldn't keep any drain valves open to the entire campground sewer system.





ScottG

Bothell Wa.

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Posted: 12/09/19 01:18pm Link  |  Quote  |  Print  |  Notify Moderator

Yes, AAV is defective. One of the cheapo's that came with our new TT started leaking gasses on our last trip.
At least it was an easy fix.


Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins.
2018 Silver Fox 32A.
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rockylarson

Jersey Shore

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Posted: 12/09/19 02:06pm Link  |  Quote  |  Print  |  Notify Moderator

Air Admittance valve CLICKY

This is OEM under my sinks in both bath and kitchen. I stayed with it because of limited clearance above the valve. I change them out at the slightest hint of odor.

Amazon has many levels of quality and design. ACE,HD,Lowes,Menards,Canadian Tire and the like.

They are designed to let air into the drain pipes when you open your sewer lines to dump. If they were not there the vacuum would suck out the protective water seal in the "P" traps.

I don't recommend Leaving the grey sewer open until ready to dump.


Jan and Rocky
Volunteers for USFWS. 25 refuges with 8000 hrs ea since 2006. 2004 Allegro 30DA, Workhorse 8.1, Banks, 2012 Jeep Liberty Jet, Blue Ox Aladdin, Brake Buddy Advantage Select, 300 watts solar, 5 Optima group 31 AGM's, 2000watt Ames PSW inverter.


ScottG

Bothell Wa.

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Posted: 12/09/19 03:59pm Link  |  Quote  |  Print  |  Notify Moderator

If you want one that will last and don't mind paying a few extra bucks for it, "Sioux Chief" or "Studor" are the brands of choice.
Anything else is junk in comparison.

rvshrinker

Beautiful Pacific Northwest

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Posted: 12/13/19 11:23am Link  |  Quote  |  Print  |  Notify Moderator

I have no idea what you all are talking about. Can you explain?

Lynnmor

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Posted: 12/13/19 12:43pm Link  |  Quote  |  Print  |  Notify Moderator

Try Google
rvshrinker wrote:

I have no idea what you all are talking about. Can you explain?


rvshrinker

Beautiful Pacific Northwest

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Posted: 12/13/19 01:26pm Link  |  Quote  |  Print  |  Notify Moderator

What is the OP Talking about? What does the fan vent have to do with flushing the loo?

mobeewan

Hampton, Va

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Posted: 12/13/19 03:22pm Link  |  Quote  |  Print  |  Notify Moderator

rvshrinker wrote:

What is the OP Talking about? What does the fan vent have to do with flushing the loo?


If you are running the bathroom vent fan in exhaust mode and flush the toilet, air from the black tank will get sucked into the trailer making for a stinky situation inside the trailer.

rvshrinker

Beautiful Pacific Northwest

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Posted: 12/13/19 05:26pm Link  |  Quote  |  Print  |  Notify Moderator

What does exhaust mode mean? My fan has an on-off switch only.

How would air get sucked from the black tank to the toilet? There s no suction created; at least in my bathroom there is a gap at the top and bottom of the door to prevent moisture buildup.

This doesn’t make any sense to me.

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