New inspection chamber (sewer)

[stevegreen]

Hi, Is there any problems in using a plastic inspection chamber on a driveway (cars will be driving over) or will I need to build a brick one as my plans state? Also I believe the interconnecting pipes need to be clay and encased in concrete if they are close to surface, would this also apply to the plastic chamber if I were to use one.
Thanks

 

[Norcon]

Shouldn't be a problem, Use one with the correct loading rate. Wavin, Marley etc make a good range.
If pipes are close to the surface encase them in concrete or better still lower them and add the appropiate rings to the inspection chamber..

 

[stevegreen]

Thanks for reply. I'm stuck with the height, because this new inspection chamber feeds into an existing manhole 10ft away. Would you say I need to encase chamber totally in concrete aswell or just beneath lid?

 

[Norcon]

just beneath lid?

Beneath the lid is the access to the drain so you hardly want to put any concrete in there!
Do the sides and base...