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Black tank outlet junction leak


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Have a slow drip coming from the clamp region at the black tank outlet. Black tank was flushed out for winter with just some RV antifreeze remaining, which is now gone. Is there a rubber gasket at this junction that needs replaced? Clamp seem frozen, even after pb blaster.

IMG_20180127_173725082.jpg

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there is a rubber gasket - you will have to get that clamp off (should not be too hard - looks like it is about to go anyway). 

the pipe should pull out - youn ay have to loosen the next clamp around the drain, so you have some play to work with.  

You may find after pulling it out and cleaning it up, it is still "somewhat" serviceable. 

I would take a really really close look at both ends of that connection .....

 

looks like part #10 in attached pdf (from winnebago parts manual)

page25-sewergroup.pdf

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That doesn't look like a factory install. Some previous PO has kludged something together.

The stub on the tank should go to a rubber coupler on the outside, then to a reducer of some kind to make the pipe the correct size for the valve

coupler  https://www.pplmotorhomes.com/parts/electrical-plumbing-lp-gas/rv-toilet-tanks-plumbing-sanitation/holding-tank-fittings-accessories/flexible-coupler-3_89-8369

reducer  https://www.pplmotorhomes.com/parts/electrical-plumbing-lp-gas/rv-toilet-tanks-plumbing-sanitation/holding-tank-fittings-accessories/tank-adapter-reducer-3-x-112_88-9191

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