How To Install A Clark Rainwater Tank

Posted on Friday 26th October 2012

Site preparation and maintenance for a Clark polyethylene tank

Uniform compaction (free from soft spots) and on level ground
All bases must be at least 500mm greater than the diameter of the tank
Ensure that the base has some sort of retainment to prevent erosion, e.g. retaining beams
A flexible coupling must be fitted to each outlet to validate the guarantee
Specifications for slab for 46,825L and 36,369L tanks:

Slab must be at least 150mm bigger than the base diameter of the tank
Slab must be at least 150mm thick with 2 layers of F82 mesh 75mm apart and a thickening of 200mm wide and 200mm deep with Y16 reo bar at the bottom of the thickening around the edge of the slab
Slab must be 32 mpa concrete mix