Mr Uncalled-For wrote:
On Aug 15, 9:23 am, Mr Uncalled-For
wrote:
I have a 3 1/2 inch drainpipe that I need to T into

Well, I checked with a plumber and apparently I would:
* Not be permitted by 'building control' to use the strap-on-boss
solution.
* Would have to do it all in cast iron (externally, that is).
* Have to get a building warrant, covering the entire job, including
routing of the pipe internally.

I would not take that as gospel....

The pipe you want to attach to, what is it a soil pipe or a rainwater pipe?

If the latter then you would not be able to tee into it unless you also
have a combined surface and foul water sewer.

There is nothing to stop you mixing plastic with CI in this way as far
as I am aware either.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/