connecting plastic to cast iron stack

6 Feb 2010
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United Kingdom
They I wanting to renew my cast iron stack in plastic from the first socket on it. I wonderd if I could put 4inch plastic pipe into the top of the cast iron socket then put plumbers mate around this will this seal ok. Thanks for any suggestions
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Don't think there is an approved way of doing this. Have used some hempwhich I have tamped into the socket and then finished with an external black mastic sealant.

Am now waiting to be shot down in flames...
mmm... "hempwhiches". Bit like space-cakes and disco-biscuits.
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As far as I know... At least until I was around the corner anyway

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