This inspection chamber has a diameter of 450mm and is 2020mm deep. It features an open main channel with 150mm Twinwall Rocker Pipes, an additional two Sealed 150mm inlets ( cut as necessary ) at 90 degrees.Cover and Frame not included.andnbsp;Restrictor Cap not included.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 150mm twinwall 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, click here.