Post
by plumbbob »
Fri Jun 15, 2012 9:42 pm
It is essential to position the tanks in such a way that when both are full, the distance between the water level and the the top edge of the tank must be equal. ie, the height of the tanks must be equal.
You cannot use valves to control the levels of water between tanks. For one thing, if the backflow valve failed it would cause a flood. More importantly, it is essential to allow the water to flow freely between tanks to maintain a movement of fresh water removing the possibility of one tank becoming stagnant.
Once levelled, link both tanks together at the bottom using pipe having a minimum diameter of 28mm. Make sure the feed is into one tank and the outlet is taken from the other tank. Under no circumstances should the incoming and outgoing water connections be from one tank.