Underground Drainage polydrain Round Chamber Access Riser 450mm

The 450mm underground Drainage polydrain was an excellent fit for the purpose it was purchased for.

Arrived on time does the job good quality.

I bought several of these rings and formed a new manhole for some underground stopcocks, when finished all that was visible was a black cover that was very neat.

Wanted to raise inspection chambers height, bought this and easily fitted on Osma 450.mm and Clark 450.

Good quality and customer service ensured the 3/4 rings which were initially not delivered arrived with 2 days! Fantastic will use again!

Great quality.Fitted well

easy to use could do well if a choice of 1 or 2 depth sizes were available

I liked it but in the end I didn't have room for the full sized inspection chamber so I have bought mini chambers.The chamber, riser and cover are for sale at £80 complete, available in Mortimer, Berkshire, UK.