Montana Owners Club - Keystone Montana 5th Wheel Forum

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-   -   Black water valve not closing (

caroldee2735 09-06-2017 03:50 PM

Black water valve not closing
Of course level indicator lights don't work so I rely on toilet giving a little burp when getting full. Busy with grandkids etc I wasn't paying attention and realized it had been several weeks since I dumped black water tank. When I pulled lever nothing came out until I started flushing . I think the valve must be letting water slowly leak out. Do I need a new valve or is there something else I can try. I thought maybe paper was sticking to it it. I dumped in water softener , dawn , flushed and flushed, still doesn't seem to hold water.

DQDick 09-06-2017 04:45 PM

You could try getting one of those valves that you hook a garden hose to and attach it to the sewer exit, turn the hose on and backflush. If it's not a new rig, however, the odds are that you'll need a new valve.

cw3jason 09-06-2017 05:29 PM

The valves the factory uses are junk. hard to move and will fail. Replace it with a Valterra valve

rohrmann 09-06-2017 07:47 PM

You might try getting one of those add-on Valterra valves you install on the drain outlet where you connect your drain hose, close it and start adding water with whatever high power detergent you choose, maybe even hot water with dishwasher detergent, and run enough water into the black tank so the entire valve should be covered. Let this sit for a few days, then bring the water level up so the water is backing up almost into the toilet. Do this with the stuck valve open. Then, drain the entire tank while running more water into the toilet. Once the water has run for a while, then try closing the valve that you were unable to close all the way. You may find the TP that was keeping it from closing has dissolved and you don't need to replace the valve. We had a couple stay with us in our rig when we had it out on our shakedown trip years ago, and one of them disposed of one of those moist wipes down the toilet, which proceeded to get stuck in the valve, and no amount of water would move it. That was a quick $250 lost that the RV shop charged to remove the wipe.

caroldee2735 09-06-2017 09:07 PM

That sounds like good advice. I will try it. I read on this forum that some use rid x , might that help too?

caroldee2735 09-06-2017 09:15 PM

I have a sewer solution thing that shoots a powerful stream up into the tank. I did that several times. I have the valterra valve on end of discharge pipe. I always keep that open because if gray water. I will try closing that trying to get black water tank full .

DQDick 09-06-2017 09:31 PM

Many of us do use an additive. Usually something like Happy Camper or Weis, but some do use Ridx.

speedster100 09-07-2017 07:54 AM

When I pulled mine apart a couple weeks ago I discovered the factory had not installed the valve correctly. When the cable was fully closed (pushed all the way in) the valve remained 1/3 open. I had already bought a full replacement kit so I installed it as the OEM unit is a piece of crap in comparison.

Good luck messing with it, fyi I changed the valve & cable out in less than an hour... Not a big job at all.....

beeje 09-23-2017 05:07 AM

I just got finished yesterday replacing all 3 of the junk Bristol valves with Valterra valves. The cables were routed horribly. Either way to long of short with sharp bends with none of the cables anchored in any way. Previously I had to use all my might with two hands to operate the valves. Now they can literally be opened and closed with one finger. I also moved the galley pull handle to the middle level up leg much closer to the others and easier to get to. Previously you had to be a contortionist to get to it, behind the rear tire trough the frame behind the bottom skirting.

CORattler 09-23-2017 07:27 AM

My black tank valve would not close all the way and allowed black tank contents to leak past the valve. When the valve was removed I discovered that a toss in packet had jammed between the closure blade and the seal. I replaced the valve and no longer use toss in packets. Problem solved.

caroldee2735 09-23-2017 10:23 AM

The new valves sound great. When I was still under warranty I thought Campers world replaced mine , whatever they did seemed to make it worse.

mhs4771 09-23-2017 10:48 AM

I refuse to toss in those packet, because not always does it totally dissolve. I'll cut open a corner and dump the contents into a jar or other container, add water to dissolve the contents, then add it to the back tank.

caroldee2735 09-23-2017 11:36 AM

Good idea to dissolve first

routemaster 08-26-2018 02:16 PM

Fail to close black tanck
5 Attachment(s)
Just today we changed out our black tank valve,This one has been in our E for about 5 years.Tank been in use every day fulltimers.It looks to be very sandy and the grove which takes the blade is cloged, stoping it from closing.There was solid chunks coming out on removal of valve We have use parks that have well water?

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