Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

mhs4771 · 11-22-2018, 08:45 AM

One thing to keep in mind when leaving the Gray tanks open all the time. Most all RVs do not use a household type "P" or "S" trap with water, they use a HepvO valve that has a rubber sleeve that opens to let the water pass through, but closes with no water, BUT closed they may not really be air tight because it doesn't hold any water, which could allow sewer gases and smells up into your unit.

11-22-2018, 08:45 AM	#8
mhs4771 Montana Master Join Date: Dec 2009 Location: Sebring Posts: 3,659 M.O.C. #9969	One thing to keep in mind when leaving the Gray tanks open all the time. Most all RVs do not use a household type "P" or "S" trap with water, they use a HepvO valve that has a rubber sleeve that opens to let the water pass through, but closes with no water, BUT closed they may not really be air tight because it doesn't hold any water, which could allow sewer gases and smells up into your unit. __________________ Michelle & Ann 2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.