Advice on Loose Salt-Glazed Collar

[jonjack]

Hi

I have removed a broken Salt-glazed bend at the base of the soil stack in my house.
I have cut away at the salt-glazed pipe that was coming off the bend to create a nice end to take a Fernco.
The only 1 thing that I'm slightly nervous about is the fact that this piece of Salt-glazed pipe that I have attached the Fernco to has about 2mm of movement in it - its not very loose but it does move - I noticed this as I was attaching the Fernco to it. Basically, the collar on the next section of pipe is broken since I can see the collar move slightly with the pipe. I do not want to dig the lot out and replace everything up to the inspection chamber since this is under the floor of an existing extension - so there is about 12-15 inches of concrete and an Antico wood floor in place that I am loathe to remove any more of.

I can probably chase the salt-glazed pipe just past the collar but since everything is covered in the usual half-tonne of concrete I am a bit nervous of how far I am going to keep breaking the existing. I have monitored the situation for a week now and there does not seem to be any leak from the collar - although this is difficult to entirely rule out since its encased in a layer of concrete.

My questions are:-

1. Do I need to do a U-gauge test to ensure that the system has acceptable air leakage (I haven't had Building Control involved since I was replacing a broken section which I believe is allowed)

2. Would you trust this collar, add a bit more cement around it and cover over?


Thanks
Jon

 

[Whl4852]

To be quite honest I'd trust it, I repaired/reinstated many of these. It'll be fine, would worry about the air test either. Good luck.

 

[stevetheplumber]

i would build the joint up with a good layer of strong mix cement

 

[Dannypipe]

I would carefully excavate around it. Then encase the joint in a strong mix of mortar, but instead of using water in the mix, I would use SBR.

Then after it had fully set, and was supported again in peashingle, I would air test it.

I would do all this, as if it is leaking, you're in the SH**. Literally.

 

[jonjack]

Thanks for all the comments.

Is the U-Gauge the only way to do a proper air test and can they be hired?

Thanks

 

[Dannypipe]

Yeah, you'll need a U guage and a bung (or a bag - inflatable).

Sure they can be hired, but you can buy a full testing kit for about £40 from Toolstation. Think Screwfix do them too.

Or go to a local 'Drain Centre' where they'll have them in stock.

The bungs are cheaper than the inflatable bags, but a bit harder to use.