Soil stack leak

Internal soil stack is leaking when toilet, basin or bath used (upstairs bathroom).

The leak appears to be happening above the base

When the downstairs kitchen and washing machine is in use, everything is fine

Opened the manhole and water is flowing (although slightly slower)

The white pipe in the pic, is from the kitchen sink

Could this be a blockage that a set of drain rods can handle?

 

If it's leaking, it's because there is a defective seal somewhere, regardless of whether it is blocked or not, leak still needs sorting. I would be surprised if it is actually blocked, as you say it only leaks when a discharge is made above, (if blocked it would leak when kitchen, washing machine, etc are being used.)

Looks a pig to get to though....

 

The leak appears to be coming from the part I have marked up.

What is this and is it an easy fix?

 

It’s a bossed connection. Is/was there anything to it or just open ended?

 

That is a 'Boss' connection. Unfortunately there is no easy fix, the internal seal where the waste pipe goes in had probably perished and if the pipe has been removed, it is very unlikely to seal again.

The only real solution is to replace that section of pipe, including the Boss. Otherwise, bodge options are, you may be able to fit a cap in with silicone (will need to be kept dry though for long enough so the silicone can go off, so nothing above that point can be discharged!), or if putting a waste pipe back in, Denso tape, (filthy stuff but will do the job probably), is the other.

 

I believe that it is open ended.

To get to the area and investigate further, I will have to remove my kitchen units

 

If you can get to it, bodge option 3, put a piece of decent thickness polythene over it, (like a hat), and secure with a jubilee clip.


(Not that I've ever done anything like that before of course...)

 

So I have removed the kitchen base units and I have attached a pic of what I found

I can't believe it.

There is just a hole and waste water is pouring straight out of the boss connection?

What parts do I needed to rectify this?

 

Put a piece of pipe and stop end.

Andy

 

Measure the size of the boss - probably 40mm - you'll need a small piece of that sized pipe with a straight coupler and a blank/stop end in it - clean that boss up so it's squeaky clean, fit the pipe in with a little silicone around the pipe end so it coats the seal as it goes in and leave it dry for an hour or 2.

 

Yes it is 40mm

How would you clean the existing boss adapter up? Soap/ water and Toothbrush?

Or should I just replace the boss adapter with a new one. If so, do you simple pull the existing adapter out?

For the blanking plug, is this an ideal product?

https://www.screwfix.com/p/mcalpine...55281954514&ds_rl=1249404&gclsrc=ds&gclsrc=ds

 

Don't forget some pipe!

Cleaning: RUBBER Gloves, damp cloth and bleach.

Andy

 

Is it possible to do this job using solvent weld?

I already have the solvent glue and using this stuff always gives me absolute confidence that I'd never have a leak again.

 

The old push fit boss' can't usually be replaced no.

If you have solvent weld then try a bit of 40mm pipe and see if it fits, usually the push fit boss' are universal and will take the larger SV waste pipe. The it's just a small piece of pipe, a straight coupler then a screwed stop end all glued together.

Cleaning the boss .... then yes soap and water and just get it nice and clean.

 

Thanks for the help guys