450mm. Use with 5-inlet inspection chambers. Can be cut to size in 60mm increments with an additional 60mm at the top. Can use a maximum of 12 risers to meet the maximum inspection chamber invert depth of 3m.
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Rating Snapshot(1 review)
1 of 1(100%)reviewers would recommend this product.
Customer Reviews for 5-Inlet Inspection Chamber 235mm Riser
Review 1 for 5-Inlet Inspection Chamber 235mm Riser
"You do not need the silicone spray to fit this, they slot in very easily to the chamber base and into other risers if you are using more than one. I used two and it was the easiest thing to assemble ever, the base and lid all slot together perfectly. If you are using the lid that goes with this you don't need a sealing ring as the lid comes with one."