Reducing Slabs

Manhole Rings

Typical reducing slabs are supplied as Type 2 to suit the various chamber sections, from DN 1200 to DN 3000 and have a 1200mm circular access. Landing slabs are made to suit chamber sections of DN 1200 and greater with an access opening to accomodate customer requirements. It is recommended to leave two metres headroom depth in the main chamber before using reducing slabs, and complete the manhole with a minimum DN 1200 shaft.