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Old 10-28-2018, 09:37 AM   #1
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Gray tank vent location - 2017 377RLBh

Good morning all, quick question, where are the gray tank vents located on the 377? I’ve been developing a very weak flow from both grays over time, especially the gally tank, when dumping and would like to confirm the vents are clear.

Thanks!
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Old 10-28-2018, 09:38 AM   #2
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The vents are on the roof
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Old 10-28-2018, 09:57 AM   #3
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Quote:
Originally Posted by Rolling_Fortress View Post
Good morning all, quick question, where are the gray tank vents located on the 377? I’ve been developing a very weak flow from both grays over time, especially the gally tank, when dumping and would like to confirm the vents are clear.

Thanks!
Some units use an 'air admittance valve', most often under a sink. They can 'fail' and not admit air.

A plumbing schematic from Jayco (call them with your VIN#) will likely show what venting your unit has.
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Old 10-28-2018, 10:08 AM   #4
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The vents are on the roof


Tom, ty! I’m at the vent in the roof. Took the top off the vent and found an old wasp nest looking thing. Trying to pull it out. To wash any smaller debris out, do you know if it’s ok to pour water down the vent? Will the water I pour in end up in the gray tank? I’m hoping to wash out anything that may be lower in the vent that I can’t see.

Thanks!
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Old 10-28-2018, 10:09 AM   #5
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Some units use an 'air admittance valve', most often under a sink. They can 'fail' and not admit air.

A plumbing schematic from Jayco (call them with your VIN#) will likely show what venting your unit has.


Thank you! I’ll call them to check on the what venting I have.
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Old 10-28-2018, 10:23 AM   #6
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Some units use an 'air admittance valve', most often under a sink. They can 'fail' and not admit air.

A plumbing schematic from Jayco (call them with your VIN#) will likely show what venting your unit has.


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This is probably it. Under sink. Getting better flow w it off.
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Old 10-28-2018, 11:55 AM   #7
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Originally Posted by Rolling_Fortress View Post
Tom, ty! I’m at the vent in the roof. Took the top off the vent and found an old wasp nest looking thing. Trying to pull it out. To wash any smaller debris out, do you know if it’s ok to pour water down the vent? Will the water I pour in end up in the gray tank? I’m hoping to wash out anything that may be lower in the vent that I can’t see.

Thanks!


You should be fine pouring water in the vent and yes it will end up in the tank. I wouldn’t go to crazy with the water just in case the vent pipe isn’t glued as good as a drain pipe
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Old 10-28-2018, 01:17 PM   #8
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I pushed a water hose down mine, with water off just to see if it went to the tank. It did. I have heard of the fitting not being joined. permanently at the tank.
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Old 10-29-2018, 06:21 AM   #9
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Thanks all for the great info! Going to try the water hose down the vent pipe trick this week.
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