I've had an open inspection chamber for a while now and figured it was time I got round to removing the paving slab 'lid' and actually buying a cover but I can't for the life of me work out what size I need.
Online they seem to come as standard at 450 or 300 but the end of the chambier riser is 310 internally and around 355 externally.
I've attached some pictures of the measurements, any help would be appreciated!
Online they seem to come as standard at 450 or 300 but the end of the chambier riser is 310 internally and around 355 externally.
I've attached some pictures of the measurements, any help would be appreciated!