Re-joining unmoveable exposed clay pipes

[thegurumonkey]

An unmoveable but exposed clay pipe union has cracked and needs re-joining.

I have to fix a crack in the join between two clay pipes. Both pipes are unmovable as they are set in concrete, though at least both ends are exposed! (See photo)

They touch at the top but have about 20mm gap at the bottom, so I'm also worried about the internal lip at an the angle change, and msinly about a long term joint that'll be set below block&beam + screed...
What's my best option?

Option A: wrap both the existing pipes in a big sheet of rubber, add jubilee clips, wrap that in denzo tape then pour concrete around it.

Option B: cut off end of cracked female pipe so about 50mm gap between pipes, then slide on a purpose built rubber connector (but then what about the lip inside, and will such connectors bridge a gap big enough to fit the connector on, and will it last without being encased in concrete?

Thanks in advance for all your expertise. I've got no toilet til it's fixed, and kids return soon!

 

[Mottie]

What way is the flow? Looks like the l/h pipe runs down and the r/h pipe runs up a little?

 

[HERTS P&D]

Cut out a section, 2 fernco couplings and a piece of pipe and supported by gravel.

Andy

 

[Hugh Jaleak]

Cut enough back to slip a Flexseal Coupling over the joint, and see how you get on. If blockages start becoming an issue, get an internal Patch installed to cover the joint, this can be done from the nearest manhole.

 

[stuart45]

Anyone old enough to remember the split double collars for repairs like this?

 

[ree]

OP,
Why not post a pic showing an enlarged area and the nearest manhole and nearest soil stack - why? because it might be easier to dig back to the manhole or soil stack bend?

For long term you need level inverts, & a remedial pipe coming from distance will give a better chance of level inverts.
Or, as suggested above, you could cut back the RH clay pipe, and insert a short length of pipe and two Fernco Sheer Banded Couplings?
To cut clay pipe you will need an angle grinder

 

[stevie888]

Plus 1 for cut out a section and 2 band coiplings. If you cut carefully and use a bit of clay to infill then you'll get a smooth invert with minimal chances of blockage/