Underground Rainwater Tanks Under Site – Out of Mind
A very neat package for collecting roof rainwater, filtering it and storing it underground, available on demand with no noise, out of sight, simple operation.
With the smallest footprint in the industry, Polymaster Underground Rainwater Tanks give you the maximum capacity for the minimum square meterage.
Approved and Tested
Fully tested polyethelene tank designed to withstand ground and water pressure at depth.
Complies and exceeds Aus. Std. 1546.1 for septic tanks.
Engineered by geotechnical experts including finite element analysis (FEA). These calculations come with tanks.
Anti-flotation design and engineering specifications completed to AS1170.
Sealed locking tamper proof lid.
