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Old 06-09-2012, 08:28 AM   #1
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2dabeach's Avatar
2007 25' Safari FB SE
North/East , New Jersey
Join Date: Nov 2006
Posts: 341
Anybody Install a 360 Siphon Roof Vent?

I recently saw an advertisment for the 360 RV Universal Holding Tank Roof Vent Siphon Cap made by 360 Products Inc. They claim better performance than the standard vents that come with the Airstreams. Has anyone had any expierence with this product?
2007 Safari 25' FBSE LS
2006 GMC Sierra 2500HD Crew Cab 4WD Duramax
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Old 06-09-2012, 10:07 AM   #2
Rivet Master
1994 30' Excella
Mississauga , Ontario
Join Date: Jun 2004
Posts: 1,010
First, what is wrong with your vent? It only needs to let air out of the tank to make room for the water going in. It also prevents the sink trap from siphoning empty, which would let tank air into the trailer. As long as the vent is not blocked it will do it's job. Also if the siphon cap constantly pulls air through the tank it may be unpleasant outside in the vicinity of your trailer.
They also don't look very nice!!
Al and Jean

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Old 06-09-2012, 12:03 PM   #3
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2008 27' Classic FB
Burkburnett , Texas
Join Date: Jul 2010
Posts: 985
In my opinion, the variety of after market vent caps offer more form than function and then it is one's opinion if they look better than a standard cap which is fairly unobtrusive to begin with. If you think about how the black tank is plumbed, you will note that it is basically a closed system most of the time with the dynamics of an open half empty milk jug. The vent is used primarily when the toilet or dump valve is open and with the latter, it is letting air into the tank. As air passes over the roof, a bit of mixing occurs at the very top of the vent pipe, but without a secondary source of air, very little of the smelly gas escapes.

This is also true of the gray tank. Many leave their gray valve open when the slinky is connected to the park's septic inlet. If the septic has another source of air and the slinky doesn't form a trap and the wind is blowing the right way, you'll vent the park's septic right out your gray vent and things won't smell so good around your trailer. Close the dump valve and all that venting (at your trailer) ceases.
AIR 47751
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