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Old 09-27-2012, 10:37 AM   #1
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Leak between toilet and black tank?

The toilet has a rubber seal or O'ring between the toilet and a PVC pipe that is about 6-8" long. Then there is another O'ring between the PVC pipe and the black tank and that is where the leak is at. Before I start taking this apart I would like to know how these O'rings are compressed for a seal? Do the two bolts holding the toilet down to the floor compress both of these or is there some other means of compression? The second O'ring that is leaking is below the floor and it may be a problem getting my hands in to reach it.
Thanks, Bill
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Old 09-27-2012, 11:10 AM   #2
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Things may have changed since the times when I worked on them, but then, the pipe to tank fitting was glued if the tank were ABS, and there was a grommet type affair used in the case of a vinyl tank?

If there is an O-ring now, I would have to bet you would access that by removing the screws you're talking about to release the closet flange and pipe going to the tank. Once to that point, it shouldn't be that hard to figure out what needs to be done?
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Old 09-27-2012, 11:59 AM   #3
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Some pipes are glued and some are simple press-ins to a grommet or seal ring. Different RV manufacturers use different techniques. I'm not familiar with what Winnie does, so can't help with the specifics. In those I have seen, the pipe just slips into the grommet ring.

As ahicks says, open 'er up and take a look.
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Old 09-28-2012, 08:27 AM   #4
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Quote:
Originally Posted by Gary RVRoamer View Post
Some pipes are glued and some are simple press-ins to a grommet or seal ring. Different RV manufacturers use different techniques. I'm not familiar with what Winnie does, so can't help with the specifics. In those I have seen, the pipe just slips into the grommet ring.

As ahicks says, open 'er up and take a look.
Most I have seen are set up this way the trouble is as I found out if the drop pipe is not glued into the floor flange driving down the road the vibrations will cause the pipe to drop out of flange.
Never realized until smells and wet top on holding tank started to splash around.
Took a year for this to happen.
The tank ring is very tight you need to carefully twist and turn the pipe pulling up as you do it gently to get enough so flange can be re-glued.
Over do it and pipe will pop out of tank.
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Old 09-29-2012, 12:48 PM   #5
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Winnebago usually uses a grommet that fits in a hole in the top of tank. The extension from the closet flange extends down through the grommet.

On my last coach the grommet was split and when the tank was full would allow black water to slosh out.
The hole in the grommet is a very tight fit. I had to use some liquid soap to lubricate when I replaced it.

I suspect the grommet was split during initial installation at the factory.
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Old 09-29-2012, 02:34 PM   #6
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Clay L, That is exactly what my problem is. Where did you find the replacement grommet? Thanks, Bill
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Old 09-30-2012, 09:04 AM   #7
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Clay L, That is exactly what my problem is. Where did you find the replacement grommet? Thanks, Bill
My local RV store had one.
If all else fails you should be able to get one on-line or Lichtsinn Motors near the factory will supply one for sure.
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