Connecting to existing sewer pipe

[vala]

My builder has come to the point of making the connection between a new waste run into the existing sewer run.

He plans on using a plastic 3 socket 90° tee with flexi couplers.

However after a conversation with Anglian water's drainage department today he's been told that he needs to use a clay y branch, then a 45° piece before connecting up to the new pipe run.

Has anyone ever heard of this?

In particular using a clay y branch and 45°?

He's a bit puzzled as to why this is the case and is going back and forth with their technical department to get clarification.

This is slowing down the build so thought I seek opinions and experience from here.

Thanks

[johnhenstock83]

not sure how anglian water does it, but thames water demands that new connections into existing sewers are made using the same material. since the majority of existing drains are made of clay, clay must be used. that clarifies the material choice.

 

as for the angle, new connections must join the drain in the same direction as the flow using a Y branch. you should also avoid any angles steeper than 45 degrees, hence 45 degree angle + Y branch.

[Dave Jones]

that was your fist mistake ringing them up, should have cracked on and got it done.

[TommoUK]

check if its a private sewer or a public sewer..if its private you just need to comply with regs.  generally if its on your land and has nobody else's shxt running through it...its a private sewer

[johnhenstock83]

On 14/08/2024 at 17:45, Dave Jones said:

that was your fist mistake ringing them up, should have cracked on and got it done.

yes and no. this is one of those things like car insurance, you don't want to mess with it.

 

the probability of something happening is extremely small, but if it does happen, it can destroy your life. the water authority will get things done, quickly (sub-contracted, of course) and then send you a bill which you will pay. tens to hundreds of thousands of pounds, non-negotiable.