Mr Uncalled-For wrote:

You can if it is easier, change the stack from CI to plastic half way
up. So you could switch to plastic and add a new branch in that.

That'd be great. I'd like that, because I bet one of these:
http://tinyurl.com/2wqwpy is not cheap.
But it seems like swapping plastic into cast iron stacks really isn't
approved of in this neck of the woods.
One plumber and the building control guy concur on this.

Judging from your later comment I assume you are in Scotland... that may
change things - I don't know anything about specific requirements there.

Here there is nothing stopping you converting from CI to plastic that I
am aware of (assuming you are not in a listed building anyway). I did it
on my loft conversion to extend the stack upwards. Took of the last bit
of CI leaving a collar on the top remaining section, wound some cord
tightly round the base of the new plastic bit and sat it in the collar,
then added a fillet of mortar to finish the joint.

I could just do what I wanted, but then might have problems selling
the house if I've done something easily visible that's not allowed.

http://www.wickes.co.uk/content/ebiz...ges/gil/73.pdf

(describes strap on bosses with CI pipe)

Part N up here, I think.
Frankly I'm becoming resigned to hundreds being added onto the bill.
After all I need to interact with the government, and trained
professionals, sob.

;-)


--
Cheers,

John.

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