Ausdrain’s EnviroModule™2 Commercial Rainwater Harvesting Tank provides a cost-effective and flexible solution to underground water storage requirements. The modular flexibility of the system offers enormous scope to maximize the amount of water storage and design a tank that best suits each individual project.
Ausdrain EnviroModule™2 tanks can be installed in landscaped areas and under trafficable areas such as driveways or carparks where external space is limited. When installed in a trafficable area, a pavement consisting of stabilised road base and asphalt or a reinforced concrete slab is required over the surface of the tank according to engineer’s specification.
The AUSDRAIN tank is recommended for car and light commercial vehicle traffic but can be designed for heavy vehicle traffic in certain situations. This will require consultation with Ausdrain and approval by a certified engineer.
The Ausdrain EnviroModule™2 tank is surrounded in a durable, high tensile strength, factory welded waterproof liner. The liner is supplied as a base and cap and is made to order according to specific tank dimensions. The cap overlaps the base and does not require joining or sealing on site, ensuring that each tank is completely watertight. Specialist liner installers can also weld the liners on-site ensuring maximum sealing of the liner and connections.
Inlets and outlets connect to a pre-cast pit. This pit acts as a maintenance and inspection chamber for the tank and houses either a suction line connected to an above ground pump or a submersible pump. It is essential that water entering the tank is pre-filtered to avoid long term maintenance of the tank. Either an Ausdrain EnviroSump(s) or a suitable Gross Pollutant Trap (GPT) should be installed to prevent sediment and gross pollutants from reaching the tank. In the event that the tank surcharges, excess water is discharged through an overflow pipe to a designated stormwater outlet.