110mm 90 degree access and de-commissioning an underground run

[Bob a job]

Hi,

I am moving an underground drainage run that supports only waste from my building.

There is a part where I am going to have to go round the corner of my house with a 90, either side of this 90 will be about 4 metres. Instead of putting a chamber for access could I T off vertically for rodding points?

Lastly is there a correct way to block up a run that won't be used anymore or would concrete be fine at both ends?

Thanks in advance

 

[muggles]

Call your local Building Control and ask them to send an inspector round - this is notifiable work and as you're not qualified to sign it off yourself, you'll need to do it the way the inspector wants it doing so he'll sign it off for you