| Black Tank Vent Plugged ??? [message #250589] |
Sun, 25 May 2014 09:43  |
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SteveW
Messages: 538
Registered: June 2005
Location: Southern California - Ora...
Karma: 1
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Senior Member |
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Greetings !!
After a few weeks of storage, and in some hot weather, I retrieved my coach from the storage yard for a wash, some minor work, and some exercise.
When I flushed the commode, (a new Aqua Magic Style Plus), there was a small "pop" and some water splashed up and out. The blank tank clearly had some positive pressure. There was water in the bowl - it didn't throw up water from inside the tank.
So... How can this be ??? Does this mean that my black tank vent through the roof is somehow plugged up ??
Thanks,
Steve W
1973 23'
Southern California
Steve W
1973 : 23'
Southern California
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| Re: Black Tank Vent Plugged ??? [message #250592 is a reply to message #250589] |
Sun, 25 May 2014 10:43  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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SteveW wrote on Sun, 25 May 2014 10:43Greetings !!
After a few weeks of storage, and in some hot weather, I retrieved my coach from the storage yard for a wash, some minor work, and some exercise.
When I flushed the commode, (a new Aqua Magic Style Plus), there was a small "pop" and some water splashed up and out. The blank tank clearly had some positive pressure. There was water in the bowl - it didn't throw up water from inside the tank.
So... How can this be ??? Does this mean that my black tank vent through the roof is somehow plugged up ??
Thanks,
Steve W
1973 23'
Southern California
Steve,
Your coach actually has two black tank vents. Go look at the roof.
It is quite possible that you have bird or large insect nests in those. You will have to go up on there to see. The rear of the two drops straight into the black tank but also picks up the shower drain on the way. The front on is only a BOCa required vent for a long drain line, but it still should be clear.
Good Luck.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Black Tank Vent Plugged ??? [message #250593 is a reply to message #250589] |
Sun, 25 May 2014 10:50 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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Betcha got some mud daubers, house wrens, spiders or even a snake making a home up there...if you're lucky. If you're unlucky, it will be a hornet or africanized bee nest.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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| Re: Black Tank Vent Plugged ??? [message #250599 is a reply to message #250589] |
Sun, 25 May 2014 12:25 |
Chris Tyler
Messages: 458
Registered: September 2013
Location: Odessa FL
Karma: 7
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Fairly easy to go up roof and remove the vent caps [you do have them right?]
Often a water hose will clear an obsruction if you dont see it right away. Failing that, A round bristle brush on a pvc pole will work. Just make sure it is secured well with duct tape or you wont see it for a long time.
Don't ask me how I learned that.
76 Glenbrook
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| Re: Black Tank Vent Plugged ??? [message #250601 is a reply to message #250589] |
Sun, 25 May 2014 12:33 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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SteveW wrote on Sun, 25 May 2014 08:43Greetings !!
After a few weeks of storage, and in some hot weather, I retrieved my coach from the storage yard for a wash, some minor work, and some exercise.
When I flushed the commode, (a new Aqua Magic Style Plus), there was a small "pop" and some water splashed up and out. The blank tank clearly had some positive pressure. There was water in the bowl - it didn't throw up water from inside the tank.
So... How can this be ??? Does this mean that my black tank vent through the roof is somehow plugged up ??
Thanks,
Steve W
1973 23'
Southern California
Sometimes the vent pipe will fall down and sit on the bottom of the tank. You may want to unscrew the cap to make sure the pipe is up above the roof line.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Black Tank Vent Plugged ??? [message #250602 is a reply to message #250601] |
Sun, 25 May 2014 12:35 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Bob de Kruyff wrote on Sun, 25 May 2014 11:33SteveW wrote on Sun, 25 May 2014 08:43Greetings !!
After a few weeks of storage, and in some hot weather, I retrieved my coach from the storage yard for a wash, some minor work, and some exercise.
When I flushed the commode, (a new Aqua Magic Style Plus), there was a small "pop" and some water splashed up and out. The blank tank clearly had some positive pressure. There was water in the bowl - it didn't throw up water from inside the tank.
So... How can this be ??? Does this mean that my black tank vent through the roof is somehow plugged up ??
Thanks,
Steve W
1973 23'
Southern California
Sometimes the vent pipe will fall down and sit on the bottom of the tank. You may want to unscrew the cap to make sure the pipe is up above the roof line.
The more I think about it, I would think any pressure in the tank is free to exhaust through any of the other drains in the coach--even though thye may have some water in the traps.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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