Rainstream Rainwater Harvesting Installation Guide

For the installation of Rainstream Home we recommend installing the tank on a concrete base, strapping the tank to this slab and encasing in a gravel surround in non-loaded applications. This ensures that even if water tables rise, or there is a high water table, the tank will not be affected. If the tank is installed in an area where there is definitely no water table present the concrete base is not required. To ensure the longevity of the system should water tables change, we recommend a concrete slab and associated strapping. Please contact us for details of installation in a loaded application.

For installation of our GRP tanks, Polypipe WMS recommends encasing the tank in concrete. Due to a deeper installation and the resulting risk of rising water table levels it is always recommended to install the tanks within a concrete surround, full details of which can be found in the installation guide. If there is no known water table on site, a gravel backfill can be used. If the tank is installed within a water table a super heavy duty tank must be used.