Good Sam Club Open Roads Forum: Black Tank Roof Vent and Bathroom Roof Vent Too Close?
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Black Tank Roof Vent and Bathroom Roof Vent Too Close?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Next
BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 06/30/20 08:09pm Link  |  Quote  |  Print  |  Notify Moderator

In the TC (see sig) there can be a whiff of tank smell that apparently comes from the open roof vent by way of the tank vent nearby, but not positive that is the source. It is not coming from the toilet or from where the toilet is sealed to the flange, which has been renewed.

Is there a trick to this, like make the tank vent higher or a different sort of cap on it? Of course we can keep the bathroom roof vent closed except when necessary, but like it open in hot summer weather.

Thanks.


1. 1991 Oakland 28DB Class C
on Ford E350-460-7.5 Gas EFI
See Profile for House electronics set-up.
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 06/30/20 08:17pm Link  |  Quote  |  Print  |  Notify Moderator

I would install one of these.
Vent hood


Bud
USAF Retired
Pace Arrow

2003 Chev Ice Road Tracker


BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 06/30/20 08:46pm Link  |  Quote  |  Print  |  Notify Moderator

The vent hood could help, thanks. Not one there now. The hood opening facing forward is away from the tank vent in back. The vent now does not have a fan, which is unusual, but there is a bathroom window that opens. I guess the idea to clear the air is open the window and the roof vent. Kind of silly in February!

I will get the whole deal new with the fan and the vent hood next project. BTDT with a previous RV. I can steal 12v for the fan from the ceiling lamp.

opnspaces

San Diego Ca

Senior Member

Joined: 12/22/2004

View Profile


Offline
Posted: 06/30/20 09:24pm Link  |  Quote  |  Print  |  Notify Moderator

If there is a sink close to the toilet poke your head into the cabinet and take a whiff. It's possible the smell is coming from there and not off the roof. If that's where the smell comes from you can unscrew and replace the air admittance valve.

Link


2001 Suburban 4x4. 6.0L, 4.10 3/4 ton
2005 Jayco Jay Flight 27BH
1986 Coleman Columbia Popup.

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 06/30/20 09:28pm Link  |  Quote  |  Print  |  Notify Moderator

Opening, high end of the vent hood should face toward the rear. We leave our vent lids open a couple inches to get natural ventilation. This reduces or eliminates negative pressure inside the rig that can suck fumes of many types in.

BFL13

Victoria, BC

Senior Member

Joined: 02/15/2006

View Profile



Posted: 06/30/20 09:52pm Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Opening, high end of the vent hood should face toward the rear. We leave our vent lids open a couple inches to get natural ventilation. This reduces or eliminates negative pressure inside the rig that can suck fumes of many types in.


You are right that the opening should be to the rear so the vent lid can be raised. But that is right where the tank roof vent is. If I go all new maybe I can put it in backwards so the opening is forward. Not the right way for vortex and all that, as mentioned. Hmmmm.

I think the vents open pointing aft so the lid won't blow off if you leave it open a bit while driving. With the vent hood on, that lid should be safe from blowing off.

Good point about the sink. There is no grey water tank in the TC, it shares with the black when not on hook ups. (No hook-ups you can simply have the grey pour into a bucket and put a lid on that to dump the bucket somewhere later, if not suitable to let it drain out with a hose off to the side.)

There is also a shower drain in the floor in front of the toilet. The TC has a sort of "wet bathroom".

We don't use the blue stuff, which smells bad IMO. We just use soap down the toilet and that works in our other Rvs no problem. Just have to get this one in shape too.

Good ideas, thanks.

ndrorder

Southwest

Full Member

Joined: 05/09/2017

View Profile



Good Sam RV Club Member

Offline
Posted: 07/01/20 06:41am Link  |  Quote  |  Print  |  Notify Moderator

No harm in routing the vent horizontal across the roof as long as it is well secured during travel.


__________________________________________________
Cliff
2011 Four Winds Chateau 23U

BB_TX

McKinney, Texas

Senior Member

Joined: 04/04/2005

View Profile


Offline
Posted: 07/01/20 09:40am Link  |  Quote  |  Print  |  Notify Moderator

Unfortunately, a common layout since both are typically right about the toilet.
And every time you flush, the sudden drop of water into the black tank will push that volume of air out the vent. And if the wind direction is blowing from the tank vent to the open bathroom vent, in it goes. A new vent with a fan might solve the problem, but would require wiring in the electric.

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 07/01/20 09:57am Link  |  Quote  |  Print  |  Notify Moderator

Check under the galley sink for air admittance valve

MrWizard

Traveling

Moderator

Joined: 06/27/2004

View Profile



Posted: 07/01/20 12:38pm Link  |  Quote  |  Print  |  Notify Moderator

"I think the vents open pointing aft so the lid won't blow off if you leave it open a bit while driving. With the vent hood on, that lid should be safe from blowing off."

If the vent lid is open when driving
You will have a ram air scoop into the bathroom


Radiate The Happy
....

Connected using Verizon and AT&T
1997 F53 Bounder 36s


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Next

Open Roads Forum  >  Tech Issues

 > Black Tank Roof Vent and Bathroom Roof Vent Too Close?
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.