Leaking joint between strap-on boss and soil pipe

[nothanks]

I've fitted several strap-on bosses without a problem, but the one I did recently is leaking at the join between the boss and the pipe (and yes, I did remember the solvent adhesive). The only thing that's different to previous successes is that the soil pipe is the brown/orange type, rather than grey, but I believe this should still be OK so I guess I disturbed the joint before it had set. Bu&&er! I presume I have to cut it off and use one of the Mcalpine mechanical bosses, unless someone here has a better idea ... ?

[Steve Walker]

I have no idea if it would work, but how about mixing shavings of the right plastic with the solvent and using it as a filler?

[Brian]

Are you sure both parts - the down pipe and the boss- are solvent weld type?

Some pipe systems us plastic which doesn?t ?melt? when you apply the solvent , both need to melt so you get a weld.

I?ve not encounter it with soil pipe but I?ve made the mistake with other waste fittings !

If it hasn?t welded, that would be my guess.

How to fix it. Either get the right boss or try ensuring the waste goes into the stack a gnats and try silicone but that isn?t something I would rely on long term.

[Fredxx]

I've come across polyethylene pan connectors that are pretty much insoluble in every known solvent. PVC and ABS, if you use the right solvent, are soluble and so weldable.

[nothanks]

I believe the orange/brown underground soil pipe (I used it for the stack pipe because I had it left over) should be solvent weld'able (according to M'sieu Google). Although I was very tempted to squirt some PU glue all around the fitting I decided to do the job properly and have just cut-off the old boss (what did we do before multi-tools?) - parts had welded but others hadn't. I'm now about to buy a mechanical boss but have the problem of converting a 54mm hole in an awkward location into an accurate'ish 57mm hole without being able to recreate a centre.

[Andy Burns]

I thought the orange pipe was for underground, and always used push fit sockets?

[Fredxx]

If you're using a boss connector it doesn't have to be accurate. A Dremel with a carbide bit will help speed things up.

[nothanks]

In fact it was fairly easy to enlarge with a sharp, rigid, knife and a half-round rasp and file. The boss is now fitted and all is well with the world, but it very nearly wasn't; the expanding bung requires the fitting tool to be rotated *anticlockwise, initially I turned it the "normal" way and the top-hat bush and rubber bung came close to falling inside the pipe!

[newshound]

My understanding too (although I am fairly sure it won't be PE, and therefore either ABS or PVC, and solvent weldable). The problem is that it will not be fully UV resistant.

[nothanks]

It is made stronger for underground use but everything I have read suggests it is OK with solvent adhesive. When I removed the failed joint some of the solvent had "melted" the downpipe but there were gaps elsewhere. I can only surmise that either the thing didn't seat properly or I didn't leave it long enough.

[nothanks]

In my application it's internal and inside boxing.

[Andy Burns]

Maybe the non-stuck parts needed degreasing?