Base Preparation

Customer Guide

This guide will ensure you] have a suitable base for your new tank.

Base preparation for rain water tanks

This base preparation guide should be taken as a guide only. It is important to have a sound base for your tank, noting that 1,000Ltrs of water weighs 1,000kg which is a significant force and may cause soft ground or inadequate bases to subside. If in doubt, specific details on the construction of a tank base should be referred to an engineer for formal advice. EcoBright Tanks accept no responsibility for the failure of a tank base. Tank bases must be provided prior to delivery.

Concrete Base

A concrete slab base is the most suitable base type for your EcoBright stainless steel rainwater tank.  Construction of a concrete base needs to be a minimum of 100mm thick and use F62 mesh, on a flat level area. If the tank is to be positioned in an area that is on a slope then the thickness of the slab is to be increased and the mesh to be a higher grade. The slab must be flat, smooth and level. A metal trowel finish is advisable.

Slabs must be large enough to support all edges of the tank, and should be at least 100mm bigger than the tank on all sides. Slabs must be allowed to cure for at least five days prior to placing tank on the slab.

Paver Base

For concrete paver bases, the area must be cleared and dug down to firm earth. Spread a sand and cement mix 75mm thick over the entire base, level out then and place concrete pavers flat on top. Once laid, shower the pavers with water to set the sand and cement. Paver base is to be large enough to support all edges of the tank. Tank may be placed on to paver base straight away. Do not fill tank above 2 corrugations for at least 48 hours.

Crusher Dust Base

Crusher dust bases are only suitable for larger diameter round tanks. The crusher dust must have no particles larger than 5mm diameter. The crusher dust is to be minimum 100mm thick. It must be mechanically compacted (eg plate compactor), level and flat. A border must be placed around the crusher dust to ensure it does not erode away over time or is undermined by heavy rain or burrowing animals. The base should be large enough to support all edges of the tank (min 100mm clearance on all sides). Tanks may be filled straight away. Coarse aggregate should be spread over any exposed crusher dust, after the tank is positioned, to prevent erosion. 

Note: Care must be taken when positioning the tank on a crusher dust base to
ensure it does not dig in and create an uneven surface.

Elevated Stand

Stand construction must be certified as strong enough to support the tank's weight. Consult a structural engineer to ensure the construction and footings are sufficient for the tank. The top of the stand must be flat, smooth and level.  Tank stands may be made with varying leg lengths to accommodate a sloping site. Maximum 20mm gap between boards.