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Old 01-13-2014, 08:24 AM   #1
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black dump valve and Camco toilet treatment

Several months back I posted a problem I was having with my black and gray valves feeling spongy and allowing stuff to bypass to the sewer cap, basically filling up the pipe from the cap to the valve, creating a mess of a gallon or so when dumping. I used mineral oil, which was suggested here, and it solved the problem, temporarily.
I use a product I get at WM called Camco RV Toilet Treatment in my black tank and wonder if this might be creating the problem. It does not say it lubricates the dump valves.
Does anyone have a product that is working and lubricating the valve seals?
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Old 01-13-2014, 08:33 AM   #2
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Quote:
Originally Posted by TexasTwoStep View Post
...Does anyone have a product that is working and lubricating the valve seals?
I've used Dawn Blue Ultra dishwashing liquid in my tanks for many years. Add about 8 oz after dumping the tank.

I have never had issues with my black or grey tank valves and the sensors on my previous trailer still worked after 10 years.

But, my tanks don't see the action that yours do.
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Old 01-13-2014, 08:51 AM   #3
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I don't use any treatment in my tanks except for Rid-X occasionally to keep a good population of bacteria living in both tanks. Then during the very hot summer months I will use Happy Camper because both tanks get to cooking pretty good when the temp is 90F - 110F.

For valve lubrication, I stick to my dump regiment which keeps both valves well lubricated. The soapy water from the grey tank will lubricate both valves when closing them. BTW, we have always used Dawn Dish Soap for cleaning dishes besides the normal shampoos and body soaps we use daily.

My dump routine follows (I use a 5 inch clear extension to see what's happening) - open black tank flush valve, pull black tank valve - when empty pull gray tank valve - when gray tank is getting close to empty, turn off black tank back flush - when gray tank is done while it's trickling, close the black tank valve followed by closing the gray tank valve. Both valves close VERY easily because of the concentrated soapy water at the end of the gray tank dump.

If your valves are not working easily, then perhaps they were installed incorrectly with the seals not set properly or the bolts holding the valve to the pipes are too tight.

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Old 01-13-2014, 08:59 AM   #4
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My 15 year old Damon had same issue. I fought it for a little while with every suggestion here in the archives.

I purchased new knife valves thru Amazon. The replacement took less than an hour.

Nice and smooth now...no leaks.

Life is good.
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Old 01-13-2014, 09:40 AM   #5
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Its time to replace the knife gate or seals. Do it before it fails in the closed posistion with a full tank. Then you have a real mess. It just happened to me. I have a very extensive post on here with pictures if you want to search.
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