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

**Carl n Susan** · 07-16-2012, 04:53 PM

It sure sounds like your black tank check valve has bit the dust. It is intended to prevent a back flow situation. There have been lots of discussions about these beauties. Do a "search" on "black tank check valve" and there will be a lot of postings. Here is one with pictures:

http://www.montanaowners.com/forums/...lve,black,tank

I believe the check valve is installed behind the shower in a 2955 but may be in the bathroom sink cabinet. Look in the pantry for an access panel.

07-16-2012, 04:53 PM	#2
Carl n Susan Site Team Join Date: Oct 2005 Location: Carmichael - CA Posts: 7,370 M.O.C. #4831	It sure sounds like your black tank check valve has bit the dust. It is intended to prevent a back flow situation. There have been lots of discussions about these beauties. Do a "search" on "black tank check valve" and there will be a lot of postings. Here is one with pictures: http://www.montanaowners.com/forums/...lve,black,tank I believe the check valve is installed behind the shower in a 2955 but may be in the bathroom sink cabinet. Look in the pantry for an access panel. __________________ Carl (n Susan) There is more to life than fuel mileage. 2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB