Althon precast concrete penstock chambers have been designed to make installation on-site as fast, safe and efficient as possible. Each concrete chamber comes in two halves with a reinforced cover slab. The units are cast to order to suit any pipe openings and invert levels required. The real benefit of using one of our concrete penstock chambers is in the ability to factory fit accessories to the unit prior to delivery to site. Our penstock chambers are typically factory fitted with penstocks. However flow control devices such as Tideflex Valves and flap valves as well as safety chains and ladders can also be fitted before delivery to site. CAD and PDF drawings of our penstocks chambers and penstocks are available.