Old Hunter soil pipe socket O-ring woes :(

[sparkybob]

Hi all,

Have got an old 60/70s PVC soil stack, the Toilet is going into a Hunter branded socket which has an old O-ring design (quite flat with 3 or 4 ribs on it). It's painted in a fetching pink/purple colour in the photo.

Tried to revive it with some grease before inserting a short length of new grey PVC pipe and have a new McAlpine WC flex connector running into the short section of pipe.

Flushed a few buckets of water down last night, no drips, cracked open a beer to celebrate (jinxed it!). This morning when I ran my finger around I could see it had weeped very slightly at the bottom of the joint between new grey pvc pipe and the old socket. Seems to happen about 30 mins after flushing so maybe some standing water in the pipe slowly seeps back. Didn't actually drip though.

Would be a major pain to replace the socket as the stack runs up to the loft conversion.

Any ideas what I could do? Don't reckon I have a chance of finding an O-ring that fits. Would some CT1/OB1 work on such a slow leak? I know it's considered a bodge, I do want it to last though (at least 20 years)

Or is it possible to just remove the old O-ring from the socket and solvent weld a new section of pipe in? It's not virgin PVC inside even after cleaning thoroughly, there's a section of black discoloured plastic which would need something abrasive to get back to original grey plastic again.

Cheers
Rob

 

[Jim Goodenough]

Hello Rob,

Just a suggestion, do you have any silicone grease? If yes, remove the piece of soil pipe and smear a nice thick layer around the seal and refit. Worth a try?

Cheers Jim

 

[sparkybob]

Hello Rob,

Just a suggestion, do you have any silicone grease? If yes, remove the piece of soil pipe and smear a nice thick layer around the seal and refit. Worth a try?

Cheers Jim

Hi @Jim Goodenough
I do have some yes , I did give it a good smear already actually as it looked quite hard, it definitely helped but still had a very small weep.

Someone on another forum suggested marking the grey pipe with a pen around the insertion point and then applying a good bead of hybrid silicone adhesive (e.g. CT1) just before the line, then when inserting again the excess will squidge out and can be worked over with a finger.

I've seen in the promotional video that stuff dries almost like a flexible rubber so should become like a custom O-ring, was going to give that a try.

Thanks
Rob