What is the part called that can hook to the tank drain opening cap area that will serve the purpose of being an external wastegate?The gate to the black tank seal isn't working so when I take the cap off I get a gallon of fecal matter on the ground. I had it at the dealer and they said the seal is fine. Wrong.A friend said that I can buy an external wastegate that will mount where the outer drain cap is mounted right now. Then I can prevent the spillage. I need to know what this product is called so I can buy it. I have tried searches and cannot figure it out. Thank you.

The valve to galley tank broke and I installed one of these:valve

Jeff,I have three valves; one for sewer (black), one for galley and one for bathroom (gray). All three tanks empty into the large (I think 3 inch diameter) drain pipe that goes under the trailer. If I want to just empty my gray, I open the gray valve and it empties to the drain pipe. Same for the other two valves. If you put a valve at the end of the 3 inch drain pipe you will not be able to empty just the grey or galley without empting the sewer as well. If you are going to fix it, do it right. Repair of replace the sewer valve. Your dealer needs to operate your waste valve in front of you so you both know it works right.

The valve that Al & Eva posted should do the trick. However, since you are going to add an attachment to the drain, you might want to get a FLUSH KING so that you can see if there is leakage and also know when the flow has stopped (clear connection). It will also provide the capability to back flush the black tank's opening (it will sometimes get clogged with tp and other stuff) and as an added bonus, it will allow you to put water back into the black tank to help rinse it out.Hope this helpsRon

The twist on valve linked in 'Brewurown' post goes right on the end of drain line.Useful but I found it too be a problem.......we travel and I didn't want it hanging out there unsupported so it would have to be installed each time when setting up.I purchased a complete valve and flanges then installed it permanently on the horizontal run just before the elbow where drain pipe turns out. Used a piece of aluminum to make a strap/support.One of the grey water valves cable operator broke off with valve in open position. Installing the 'new' drain valve at end of pipe was easier than dropping the underbelly (or cutting a window in it) to get at OEM valve for repairs.Waste water waiting for you behind the end cap means that waste valve(s) are leaking thru.Many times it is due to 'stuff' being stuck in grove keeping the valve blade from fully closing. Back flushing with a hose and nozzle up thru drain line will sometimes clear the obstruction.

I have had a spin on valve on the end of my drain for 3 years and about 20,000 miles. Best thing EVER. Never had a problem with it falling off. If it bothers you glue it in place. Should be standard equipment on every trailer.B.O.

external wastegate for drianing tanks | Good Sam Community

13 Replies

lanerd
Explorer II
Jul 02, 2013
The valve that Al & Eva posted should do the trick. However, since you are going to add an attachment to the drain, you might want to get a FLUSH KING so that you can see if there is leakage and also know when the flow has stopped (clear connection). It will also provide the capability to back flush the black tank's opening (it will sometimes get clogged with tp and other stuff) and as an added bonus, it will allow you to put water back into the black tank to help rinse it out.

Hope this helps

Ron
big_bird_2
Explorer
Jul 02, 2013
Jeff,
I have three valves; one for sewer (black), one for galley and one for bathroom (gray). All three tanks empty into the large (I think 3 inch diameter) drain pipe that goes under the trailer. If I want to just empty my gray, I open the gray valve and it empties to the drain pipe. Same for the other two valves. If you put a valve at the end of the 3 inch drain pipe you will not be able to empty just the grey or galley without empting the sewer as well. If you are going to fix it, do it right. Repair of replace the sewer valve. Your dealer needs to operate your waste valve in front of you so you both know it works right.
Brewurown
Explorer
Jul 02, 2013
The valve to galley tank broke and I installed one of these:valve

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external wastegate for drianing tanks

13 Replies

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