This inspection chamber has a diameter of 450mm and is 502mm deep. It features a main channel of 160mm, an additional two 160mm inlets at 90 degrees and another two 110mm inlets at 45 degrees.Our inspection chambers allow access to drain and sewer systems for testing, inspection, maintenance and cleaning. These actions can be performed from the surface and should not require entrance into the chamber itself.KEY FEATURES andamp; BENEFITS OF THIS PRODUCTQuick and simple installationArrives factory assembled in one pieceDesign life of 60 yearsLightweight and requires no specialist equipment to liftCompatible with most UK twinwall pipe systemsGranular backfillComplies with EN 13598-2 (2009), SfA7 and Building Regulations Part H14 x 160mm andamp; 2 x 110mm inletsNOTE: This product is not supplied with a lid, which must be purchased separately. For this chamber, we would recommend either our 450mm square to round cover or 450mm chamber circular access cover.To view Turtleand#039;s installation guide for inspection chambers,andnbsp;click here.