Grey water valve problems

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JoeandJane

Well-known member
Joined
Jun 30, 2014
Posts
177
Location
Zimmerman MN
I have a 2004 331c. Came home last night to find my gray water tank was empty it had been leaking all weekend evidently. Is that a reasonable DIY project to replace that valve? And, it has a long shaft from the valve to the handle which flexes quite a bit when I try to close it, is there a better way to do that?
 

Rene T

Site Team
Joined
May 20, 2011
Posts
19,783
Location
Farmington NH
It’s very easy to change out. Also while you’re at it, purchase a spin on valve and put it on the outlet end of your sewer pipe. This will serve as a backup valve in case your tank drain valve leaks by which it did happen to you. Your hose would attach to this valve.
 

youracman

Well-known member
Joined
Nov 17, 2015
Posts
309
Location
Denver, CO
John I don’t think he has a cable operated valve. He said the long shaft flexes
My 2007 331C does have the cable operated valve; replaced it about 6 years ago. The PO took his family to the beach a lot (CA) and there was some sand in the valve ...... for whatever reason, the new seals I installed didn't fix it. I had some misalignment on the new valve install; a short piece of 1-1/2 inch rubber hose with clamps (from HD) took care of that. The OEM cable on mine was kinked a bit just downstream of the handle and even with the new valve excessive force was req'd to operate the valve. I installed a new cable and left more slack for turns ......... fixed the "hard to pull/push" problem.

It is easy to separate the valve (in place) and install new seals (being very careful not to over-tighten the 4 bolts with the serrated nuts) and that works for most folks, I believe......just not for me. In addition to the videos above, viewing the "Valterra" vid below will absolutely be worth your time. Good luck on the fix.

 
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