We've had a new extension added to the house which has a drain under the concrete. We're left with a 110mm (I think) vertical pipe which our waste needs to go down inside the extension.
This waste is only for the sink and dishwasher. Toilet and bathrooms go down a waste pipe at the other end of the house and meet on the main sewer pipe which was sorted by the builders.
- How do I leave the connection between the 40mm from the sink to the 110mm?
- Do I just drop some of the 40mm inside the 110mm pipe so that it can drain away?
- Does the connection need to be blocked off with a rubber seal to stop smells?
- I assume if I do need to seal it up that I'll need to have a T joint or similar above so that it can be unblocked if necessary.
Best Answer
You want something like this.
This is a rubber connector which goes in the top of the 110mm pipe, and the 40mm pipe slides in to it.
Yes, the connection needs to be sealed to seal off smells. If the 110mm pipe gets blocked (unlikely, because any blockages are much more likely to form in the 40mm pipe), you can easily disassemble it.
Note: The link is to Screwfix because that was the first result I found. I wouldn't actually buy from Screwfix.