Advice on replacing Waste Swept Tee Connector

[sundaybighouse]

Hi guys, I've had a leak stemming from the below tee connector. I had to cut out my living room ceiling to locate the leak.

As well as fixing the leak I would like to install a non return valve to prevent the water running from my sink waste and bubbling up through my shower.

Is it possible to get one of these waste swept tee connectors with a non return valve in them?

Also I noticed that the pipe from the sink waste looks to be 40mm then it goes into an adaptor(where the leak is) and then into the 50mm tee and then 50mm coming out of it. the shower waste seems to be 50mm. Is this normal. Surely it would have been better to make them all 50mm?

Could someone advise as to what the best fix would be here?

Much appreciated

View media item 42236View media item 42235

 

[Charnwood]

View media item 42239That really does not look right to me. Too much gap between the nut and pipe.
It looks like it's supposed to be a compression reducer. It looks more like the telescopic 11/4" waste connector from an adjustable trap that the pipe's been pushed into.

Might be wrong. A closer picture of the joint itself might help.

 

[sundaybighouse]

Thanks Charnwood. Yep judging by the rest of the plumbing this is no surprise I've posted quite a few times on here about my inherited botched plumbing.

Anyway I want to remove that part and replace it with a tee with a non return if possible?

Why do you think the sink waste is 40mm and the others 50mm?

 

[TicklyT]

Basin wastes are usually 32mm (1¼" in old money), and bath and shower wastes are usually 40mm (1½"). That's the nominal bore of the pipes. The OD is somewhat larger.

Water bubbling up through the shower waste could be caused by a number of things, including:-

Undersized or overlong waste pipes.
Insufficient fall on the pipe run
Pipes sagging between supports
An actual blockage.

Fitting a Hep V0 trap or similar to the shower waste only addresses the symptom, not the cause.

If the pipe run is over 3 Metres, it may be worth increasing the pipe size size to 50mm (2") downstream of the tee.

I hope that isn't a 2" lump chewed out of a floor joist to take that shower waste

 

[sundaybighouse]

Hi TicklyT,

Yeah I already know why it is bubbling through. A combination of the pipe being nearly horizontal and overlong waste pipes. I cannot do anything about it .

The whole loft needs renovated but I don't have the money. The previous owners obviously got some cowboy in. I have the same about issues with the soild stack cause there isnt enough room to create the fall. There is just enough of a fall for the water to flow away.

There are many problems all caused by this botched loft conversion but until I get the money to fix it right I can only do small repairs in the meantime.

I was really just wanting information about whether I can get a non return value in a Waste Swept Tee Connector?

 

[Nige F]

I was really just wanting information about whether I can get a non return valve in a Waste Swept Tee Connector?

No such part

 

[sundaybighouse]

Thanks NigeF. I guess I'll need to put up with the bubbling in my shower.

I'm going to replace the 40mm pipe with 50mm. Is there any reason why this would be a problem?

 

[TicklyT]

As Charnwood said, that reducer doesn't look right. A proper 32 X 40mm universal reducer usually looks a bit more like:-

and I would expect to see a short stub of 40mm pipe between the reducer and the tee.

50mm waste has almost twice the capacity of a 40mm, and about 4 times the capacity of the 32mm basin waste so, replacing the tee, and the pipework downstream of it could help.

Replacing the shower trap with a 40mm HepV0 trap could help too.

Make sure there's no dips or sags in the pipe runs where water could sit, or blockages form, and add as many pipe clips as necessary to keep it there.

Try and build in some form of rodding access, so you can clean out the waste pipes if (when) they get bunged up without ripping your ceiling down again.

I would prefer all solvent weld pipe and fittings in that situation, but you can't solvent weld pushfit pipe (the plastics are not compatible). You need something like universal compression fittings to unite the different systems.

Maybe someone has tried sticking an oddment of 40mm pipe to the end of the 32mm pipe. It usually works for a while, but the glued joint soon fails.

 

[sundaybighouse]

Thanks TicklyT.

Replacing the shower trap with a 40mm HepV0 trap could help too.

Wouldn't I need to dig my shower base out to replace it though?

Make sure there's no dips or sags in the pipe runs where water could sit, or blockages form, and add as many pipe clips as necessary to keep it there.

Yeah I'm going to do that, the sink pipe was being supported by bits of rubble jammed underneath it, forcing down onto the living room ceiling!

Try and build in some form of rodding access, so you can clean out the waste pipes if (when) they get bunged up without ripping your ceiling down again.

I really don't know how I would even approach this, all the piping is inbetween my living room ceiling and bathroom floor.

You can't solvent weld pushfit pipe (the plastics are not compatible)

I take it that my existing wastes are push fit?

Thanks again

 

[Charnwood]

but you can't solvent weld pushfit pipe (the plastics are not compatible).

Polypropylene (push-fit) does not react nicely when you spread solvent cement on it.