RWP Drainage Fitting

[Luis21x]

Hello,
I wonder if anyone can help with this query. We have a 100mm square RWP that needs connection into circular below ground drainage pipe work. Is there a socket/connector that will enable a square fitting of this size to securely connect to the below ground drainage ? Or do we need to utilise a gulley, if so can the pipe connect inside rather than discharge above into a grating .

Regards,
Graham

 

[vinn]

A Floplast (universal?) rainwater adaptor (i think they are on screwfix) or similar will work.

 

[Luis21x]

Thanks Vinn,
I've looked at those and they say for usecwith 65mm sq pipework, whereas we have 100mm

 

[vinn]

Sorry about that.
You could use a reducer fitting from 100mm square to whatever, although its bad practice to reduce drainage.
Probably a bottle gulley is the answer, its also best practice and Regs.