connecting kitchen waste to rainwater stack

[jwmonkeybiker]

Hi there,

Looking for a union/branch/reducer (not sure of correct name) to connect my 1.5" (40mm?) waste pipe, from kitchen sink, to 3(?)" - '68mm' printed on the pipe - rainwater stack.

I replaced the old gnarled cast stack and guttering but can't find a white piece to make the said connection. Tried the usual outlets locally (Scotplas, Plumb Center, Graham etc with no luck).
I know the mixing of rain and foul is contentious but it's a Victorian property and has always been mixed.
There's no option to connect to a soil stack as the closest one's the other side of the house.
Scoured online forums for such an item but the conclusion seems to be that one doesn't exist. This surely can't be the case?!
Also, what do I need to connect the new uPVC stack to the remaining stump of cast at ground level?

Cheers.

 

[John506]

Drill a 40mm hole in the pipe with a hole saw.

Enter grommet - example below
http://cgi.ebay.co.uk/40mm-strap-bo...0616722258&po=&ps=63&clkid=345143923846424810

Seal up with some silicone or something on the same level.

Job done.

 

[Hugh Jaleak]

No fitting exists to connect waste pipe to 68mm downpipe. Can either use option given above, or direct waste into a gulley. It sounds however from your description, like the downpipe goes straight into the drain, i.e. no gulley, so make sure it isnt running to a soakaway before connecting a waste into it!

Look at 'Fernco' couplings for connection of uPVC to the cast.

 

[jwmonkeybiker]

thanks very much for that. more or less what i suspected. weird situation but there you go.

thanks again