Worn rubber seal on 110mm soil pipe

[Welly]

Hi.
I am hoping someone can give me some good advice.
I am renovating my house and the branch on my soil pipe (Hunter upvc 40 yrs old) is built into a dormer stud wall so cannot be removed.
The small piece of soil pipe from the old toilet came out reasonably easily but the rubber seal (which is approx 10mm wide of flatish ridged rubber - rather than the modern single flap style) is quite flat such that the new bend\branch is a fairly loose fit and will inevitably leak.
I have phoned Hunter Plastics and they have advised that they do not do replacement seals given the age of my pipes.
Obviously cannot use Plumbers Mait so have any one out there encountered this problem and how was it resolved?
I need to ensure a watertight fit as the branch connection is in the timber floor so a future leak when the wc is in place and flooring finished would be a nightmare!
Thank you.

 

[Meady]

Remove the rubber seal and use the PVC glue that is used for solvent weld fittings.

 

[Welly]

Thanks - will try but think there may be too much play between the new bend and the existing branch such that the solvent weld won't work but will try.

 

[Ray Stafford]

If there is too much play, use gap-filling cement.

 

[kris]

Plumbers best friend , Master Dow Corning in black,

 

[jonnyswamp]

Gap filling cement, silicon around edge of joint, then wrap with a wax tape (denso) pushing the tape tight around the joint
As long as your pipe isn't moving about when you make the joint,it will be fine
Or, if you can remove the plastic collar that holds the rubber seal in place, you may be able to replace it by matching it with another hunter seal

 

[WaterTight]

not just leak risk, smell risk.

wants doing proper.

 

[joni os]

Cleanliness is essential for solvent weld. Remove plastic retaining ring of rubber seal. Thoroughly clean inside collar with plastic pan scourer or similar. Cut 150mm length of pipe to join to collar, ensure adequate bevel on outer end to ease fitting of future coupling. In absence of solvent weld primer, wipe inside collar and joining surface of pipe with acetone dampened cloth. Coat inside collar and joining surface pipe with appropriate gap filling solvent cement and assemble with slight rotation. Remove excess build up of cement inside joint. Do not be tempted to glue in long length of pipe as this would increase leverage on joint.

 

[Welly]

Cleanliness is essential for solvent weld. Remove plastic retaining ring of rubber seal. Thoroughly clean inside collar with plastic pan scourer or similar. Cut 150mm length of pipe to join to collar, ensure adequate bevel on outer end to ease fitting of future coupling. In absence of solvent weld primer, wipe inside collar and joining surface of pipe with acetone dampened cloth. Coat inside collar and joining surface pipe with appropriate gap filling solvent cement and assemble with slight rotation. Remove excess build up of cement inside joint. Do not be tempted to glue in long length of pipe as this would increase leverage on joint.

Thanks to all for the helpful advice.

Does anyone know if the retaining clip holding the seal is likely to be glued or clipped bearing in mind this is 40 yrs old. It seems to be glued but it could well be that I am not being firm enough with it. Before following the good advice I have been given I may be able to get hold of some "modern" Hunter seals and whilst they possibly won't work I am hoping to try that first before the more "permanent" fix of solvent filling\welding so am trying to keep the retaining clip in one piece - sods law being that it could be brittle and break anyway.

Thanks again!

 

[joni os]

Could normally prize of retaining ring with 2 pence piece, failing that a short stubby scraper should work.