Underground pipe connection advice needed

[wtjfree]

Hi all,
I am currently doing a diy project to creat a downstairs wc.
I have laid a 3m underground pipe(110mm) through the kitchen and connected to main waste pipe.

My concern is that can I drill few 40mm holes on the “leveled” waste pipe to connect sink and dishwasher etc.? Is there any other option?

Any comments would be highly appreciated

 

[Neil K]

You can either 1) cut the pipe you've laid (I presume there's a fall on it) and put tees on it, called 4 inch x inch and a half or inch and a quarter boss branches or 2) you can buy 4 inch x inch and a half or inch and a quarter strap on bosses which will involve drilling the correct size hole in the 4 inch pipe you've laid carefully with a the right size holesaw bit. In both cases use plenty of solvent glue and give it 12-24 hours to set before testing it.

 

[SimonG]

What did building control recommend?