CPM precast concrete chamber rings are manufactured with tongue and groove joints and comply with BS EN 1917:2002/BS 5911-3:2010
It has soakaway units with 500mm, 750mm and 1000mm depths and 75mm diameter holes, providing a minimum area of exfiltration of 50,000mm² per metre of nominal diameter per metre of depth.
Visit the Marshalls CPM website for more information on Chamber Rings/Soakaways manufacturer