CPM Group Ltd in conjunction with Ham Baker the market leader in Penstocks & Flap valves have developed an all in one pre-cast concrete chamber which is delivered to site with the circular Non-Return Flap Valve pre-fitted into position on the head wall. Therefore the chamber can be delivered directly to site for easy and quick installation on site.

The Ductile Iron Circular Flap Valve is incorporated into either a one-piece 1200mm or a 1500mm diameter pre-cast reinforced concrete chamber with pre-formed base and head wall. The size of Flap Valve varies depending on the diameter of chamber.

The CPM Chamber is fabricated using a base unit complying with BS EN 1917: 2002.