Attaching onto an internal soil pipe from outside

[DavidSWP]

Hi,

I have a condensing boiler with a soak-away and want to plumb in the condensate pipe to the waste pipes and do away with the soak-away. The only way I can see to do it is to run a pipe external to the building from the room with the boiler in it diagonally to meet with the outside wall of the bathroom downstairs which has a boxed in section on the wall which is presumably a 110mm vertical waste pipe inside. Problem is the easiest way to drill through the wall in the right place would be to cut out a section of the 110mm pipe in order to drill a hole right behind it and then replace the cutout section with a T junction to meet the pipe coming through the wall from the upstairs boiler. I don't really fancy doing this and am worried that the lower section of the 110mm pipe may fall out of view after I cut it and also because I've never seen such a T-section, only bosses that strap onto the 110mm pipe. So I was thinking of cutting a small hole at the side of the 110mm pipe from inside and then measure sideways from outside so I should be in the middle of the 110mm pipe. Problem is drilling at an absolute 90 angle to the wall from the outside through uneven stonework so it comes through on the inside in the right place.

Anyone got any other suggestions? Also, do you have to replace the lime chippings in a soakaway every 1 year or 2 years?

 

[muggles]

It shouldn't be too hard a job for an RGI to core through a wall and attach an appropriate fitting to your stack - there are fittings available that can be installed "blind" for just this kind of situation. I say an RGI as the condensate pipe is considered to be part of the flue system, which should only be altered by a Registered Gas Installer.

Lime chippings in a soakaway should be topped up annually as part of your boiler service

 

[DavidSWP]

Thanks, do you have any information about these fittings, e.g. key words I can search for on a search engine? I doubt most RGIs would do an acceptable job.

 

[I Like Sleeping]

Thanks, do you have any information about these fittings, e.g. key words I can search for on a search engine? I doubt most RGIs would do an acceptable job.

Thats a sure fire way to get help in here!!!

 

[DavidSWP]

Thanks, do you have any information about these fittings, e.g. key words I can search for on a search engine? I doubt most RGIs would do an acceptable job.

Thats a sure fire way to get help in here!!!

I don't need or want help from RGIs after experiencing them on this forum and
in real life, would rather ask my mum. Looking for advice from Diyers only. I can do this anyway, just wondering if anyone has a brainwave to make it slightly easier.