Possible Vent Pipe Slippage

[Riverbug]

After going back and looking at the pics....That is all wrong. There should not be an adaptor. The 1.5" vent pipe is suppossed to be pushed into the gromment after it is installed in the tank. The gromment tightens up on the pipe, and the hole in the tank making for a very secure leakproof connection. And it is impossible for the pipe to be pushed in too far.

If I understand your work around correctly, the vent pipe is now kept from dropping back down by the steel dowel in the roof? And that is also what is keeping this "adaptor" (that should not be there) sealed against the top of the tank?

Being as how it is a 2023,hopefully it is still under warranty. That needs to be redone properly.
It will likely need a new tank, as your present one was probably butchered by the installer on the assembly line. Who then tried to "fix it" with an adaptor.

As far as what can go wrong with your workaround, there are several possibilities.
If my under standing of it is correct, the pipe is now hanging from the TTs roof by the steel dowel. and the pipe is now under tension by the adaptor against the top of the tank. At some point as the TT experiences a 6.0 earthquake on every trip, something will probably give.
IME, holding tank problems always happen at the worst possible time.

The dowel holding the pipe is not under tension, it's just there to ensure the pipe doesn't slip down again since the fitting on the inside of the tank cannot restrict the pipe from slipping down as it would have if it were on top of the tank/seal. I've done plenty of testing since my modifications were made have been on the road again for a month already. So far I am satisfied that the work around will be just fine, but if anything arises, I'll handle it. Thanks.

 

[huntindog]

The dowel holding the pipe is not under tension, it's just there to ensure the pipe doesn't slip down again since the fitting on the inside of the tank cannot restrict the pipe from slipping down as it would have if it were on top of the tank/seal. I've done plenty of testing since my modifications were made have been on the road again for a month already. So far I am satisfied that the work around will be just fine, but if anything arises, I'll handle it. Thanks.

I think that as the TT flexes on the road, that the pipe will be under tension at times. As you know, they use a very thin walled pipe for the vent to save weight.