I’m advised that my new Aquaplate tank requires a “first flush”. Why?
During the manufacture of an Aquaplate, the consequent roll forming and building of the tank, residue settles on the plastic skin (Aquaplate=plastic coated steel). The advice to flush the tank seems to be a paradox for the following reason: disregarding the fact that you are asked to fill your 22,000 L tank and then drain that tank which would cost you about $ 150 worth of water. By the nature of design of corrugated steel tank, the last 1,000 L (in the case of a 22,000 L tank) cannot be drained from the tank. It is a fair assumption that all the contaminants that you’d like to remove will remain sitting in the last 1,000 L in the bottom of the tank. There is no first flush requirement for our stainless steel tanks.