40mm bath waste into existing cast iron tee

[Michl]

Hi guys, could you help me out with the correct method of installing a bath waste into the above? I've attached a picture of my horizontal 40mm waste pipe dry fitted into the existing cast iron tee. I have cut back some of the stuff (hemp?) that was wrapped around the old waste. I suppose if I can get the pipe in far enough it cannot leak unless there is a blockage lower down the cast iron waste but I would like to seal it up properly. the outside diameter of the cast iron that the plastic pipe enters is 56mm

 

[Newboy]

What's under all the denso tape?

 

[Michl]

The metal pipe is below, presumably cast iron. I wanted to remove it all so you could see but that tape is really tough, didn't have a knife with me to remove it

 

[Michl]

this might be clearer

 

[Newboy]

If the exposed pipe is cast and firmly jointed into the stack then probably the simplest solution would be a Fernco reducing coupler http://www.flexseal.co.uk/products/flexible-couplings/
If the existing fittings are not in good nick then it means going back to the stack, removing the existing fitting and using a cast-to-plastic adapter

 

[Michl]

Nice one, thanks

 

[Michl]

This is what it looks like cleaned up, guess I can just get rid of the extension bit that I'm holding up in the the picture and use a fernco coupler? Pipe has 60mm diameter

 

[Madrab]

That looks like it's an old piece of lead waste pipe that is fixed into the cast branch. If so (is it soft?) be careful connecting a fernco to it as it will be easy to over-tighten and deform the lead, stopping it from sealing correctly. Give it a good clean too with some 120grit.

 

[Nige F]

I think the OP is holding a lead thingy made to sort of fit onto a plastic pipe in the iron socket - so go ahead with the fernco or a mc alpine universal if one fits

 

[Michl]

Nice one guys, it is a lead extension onto the iron. Thanks for your help