110mm push fit soil pipe fixings - two fitting methods?

Question

It is a while since I messed around with 110mm soil pipe fittings.

Digging a brown OSMA joint out of stock, I find it has a rubber seal inside a collar.

First attempt to push in a length of grey pipe was not successful. I then levered off the brown plastic ring with the rubber seal, slid this down the grey pipe, fitted the grey pipe into the joint and it looked as though the sealing ring would knock back down to grip the grey pipe.

I thought I had better check, and all I can find online so far is the method of chamfering the end of the grey pipe, lubricating it with silicone, and forcing it in.

Is my (possibly logical) way O.K. or should I reach for the lubricant?

Cheers

Dave R

charles · Accepted Answer

In article , David  wrote:

John Rumm · Answer

A chamfer and some lube is your friend... there should be no need to  pull apart the seal.

Tim Lamb · Answer

In message , John  Rumm  writes Fairy liquid works here:-)

newshound · Answer

+1; although I have to admit doing it by disassembly once, where access  was a bit awkward. Needed to use a hammer on the end of a piece of  batten to fit the ring back on. And although I have used plenty of fairy  liquid in the past, my impression is that proper silicone oil (liquid or  spray) is slightly better.

Andrew · Answer

if your name is Bodgit&Scarper

PeterC · Answer

One advantage of WU liquid is that it dries out. Silicone oil/grease stays slippery permanently - this is OK if you might want to disassemble it, but does need axial limits otherwise the union might slide apart (unlikely in most circumstances). One example is foam padding on handlebars. Now it's not A Good Thing for the foam+tape to slide off and some people have had that happen. Using a water-based lube avoids this, if given time to dry out.

PeterC · Answer

or KP if vegetarian.

110mm push fit soil pipe fixings - two fitting methods?

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