3 inch soil pipe

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Fallout

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Have a bathroom that has a toilet feed of a 3inch cast soil pipe. Is there a way of connecting to this to convert to 4inch soil. Was thinking I could connect to socket of the branch of the 3inch as this is a larger diameter
 

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Thanks was wondering whether that would fit in the socket of the cast tee. Then take 4inch plastic inside
 
Fallout said:
Thanks was wondering whether that would fit in the socket of the cast tee. Then take 4inch plastic inside
Click to expand...
Ahh, so a cast iron tee. I could be wrong, but this may be 4”, in which case a McAlpine dc1 would be better
 
Thanks yes I was ment to attach this
 

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