Increase rain water storage in your tank(s)

The amount of water stored in your tank is "restricted" by the position of the overflow outlet.  Doing this will increase your storage to just below the lid  😉

‎Robert Higgins‎ to WATER SHEDDING WESTERN CAPE.

2 mins · 

Easy way to expand the storage capacity of any water tank, this is on a 2500 liter tank and using this simple mod it increases the capacity by 200 liters. Just make sure the lowest surface of the extension is slightly below the lowest part where the lid fits. 2 tanks that's an extra 400 liters when the rain comes.