Oasis - Commercial Rain Harvesting Tanks and Systems CPM Environmental has developed a series of Off-Site Solutions products for Rainwater Harvesting and Grey-water recycling systems. • Extensive range of standard & bespoke storage tank capacities. • Various filter system options available: external or pre-fitted over-tank versions available i.e. no separate filter chamber. • Bespoke design to suit customer drainage requirement. • Concrete tanks require no concrete surround, saving huge amounts of ready-mix concrete on site. • Tank does not require to be filled with water when back filling unlike some tank materials. • The Oasis chambers and pipe systems are Kite-marked to BS EN 1916/1917: 2002. • Rain water/grey-water combined system is available • Can be installed in trafficked areas, chamber supplied with standard hd cover slab. • Range of water management systems available: Rain-manager (suction pump), header tank or control panel (submersible pump). • The oasis chambers and pipe systems are Kite-marked to BS EN 1916/1917: 2002. • Can be installed in trafficked areas, chamber supplied with standard hd cover slab. • Product registered with the Water Technology list. • Lowest carbon footprint (over 50% more C02 e for DN 2100 plastic than for concrete). • Lowest water footprint (3 to 7 times more water for plastic than for concrete). • Concrete has the ability to absorb C02 over its lifetime of service. • Second life re-use potential. • High use of recycled raw materials. • Concrete Tank system also benefits from 120 year design life.