No Hub clamps

[minilite2506]

Does the RVIA allow the use of no hub clamps on plumbing drains?

[Bama Rambler]

If the plumbing is cemented into the hub, clamps aren't required.

Do you have some non-glued plumbing that's not clamped?

Why do you ask if RVIA allows it?

[minilite2506]

I have to make a repair under a sink going into the grey water tank. And have limited space. Just thought a no hub would be easier than cutting out a lot of piping.

[Bama Rambler]

We call those Fernco couplings. They're fine to use on drain and vent lines.

[mfMcFroggierPod]

Keep in mind the drain lines are sometimes a different spec than home drains. I recently had to cut mine to replace a air inducer valve on drain. I could not find a new female adapter to fit at home centers/rv parts stores. I ended up using a fernco coupling. The mfg did not allow enough space to unscrew the vent so it was either cutting the pipe or tearing the entire counter top off to service this part..... The rubber coupling willbe an added benefit due to all the vibrations bouncing down the road!


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[Asrabbit]

I don't see why a no hub would be an issue particularly in a vent line. No hubs are used all over the place in home repairs including underground. Now, I guess one would consider vibration in an RV, and I guess over time that could be an issue. Otherwise, you will need to find you an ABS slip coupling to do what you are needing to do. I would assume you are dealing with 1 1/2 inch line. You would need to go to a plumbing supply to locate an ABS coupling.