With their curved 90 degree bends, our high level tank overflow outlets raise the level at which your tank water begins to overflow. Every extra millimetre of water over a square metre gives you another litre of water in your tank. By adding up to 120mm to your tank’s capacity, this significantly boosts the volume of water you can store.
By adding volume to your pre-existing tank you can store and use more water. The added capacity wastes less water during high rain periods and gives you more water to use around your property.
Tank Overflows provide additional security for your tank’s connections, and allow you to effectively manage overflowing water. Tank Overflows also allow you to increase your water tank’s storage, enabling you more ability to plan for volume.
When properly installed, your tank overflow should be maintenance-free.
We recommend pairing your tank overflow with a mosquito-proof screen or flap valve to prevent mosquitoes and other pests entering your tank through the overflow outlet.
NOTE: Consider the use of a Tank Overflow Gasket and Mozzie Stoppa if required
Check that your tank screen is free from debris, ie. leaves, sediment
Your tank outlet may be restricted by a blocked Mozzie Stoppa or another obstruction.
Check your overflow outlet for the presence of an obstruction and remove.
Alternately, the level of your tank overflow may sit above the base of your tank inlet.
Check that the outlet pipe is equal to or greater than the combind capacity of the pipe feeding your tank inlet
If a Mozzie Stoppa is installed, remove, inspect and clean if necessary before reinstalling it at the outlet or replacing with a Mozzie Stoppa Easy-Clean.
If your inlet/overflow issue persists, remove your tank screen and check for floating debris on the water surface. Floating debris such as sworf from the tank installation process’ may be blocking the Mozzie Stoppa during overflow and drifting away from the overflow when overflow has stopped.
High or extra high tank overflows offer a simple and effective way to increase your tank’s storage capacity.
Whichever tank overflow product you choose to use, your overflow needs to sit below the base of your tank inlet screen. The advantage of the high level overflow is that it raises the maximum water level within the tank.
The diameter of the overflow must be equal to or larger than the diameter of the inlet pipe.
You can choose to use a gasket or silicon to seal your overflow to your tank. Silicon is not required if you use a gasket. All our tank overflow kits come with a gasket.
You can choose to use a gasket or silicon to seal your overflow to your tank. A gasket is not required if you use silicon. All our tank overflow kits come with a gasket.
The bend on your high level tank overflow should face up towards the top of your tank in order to increase your tank’s storage volume and overflow height.
Yes. We recommend installing your high level overflow with the bend facing directly upwards, however, it can also be installed on an angle to adjust the upper level. This may be necessary to ensure the overflow level stays below the base of your tank inlet and/or tank inlet screen.
When connecting two tanks, it’s best to connect them at the base with a balance line. It is important to ensure that the tank receiving water from the roof or other catchment area has an overflow outlet.
Yes, it is important to mosquito-proof your tank outlet to keep mosquitoes and other pests out of your rainwater system. You can do this using a mosquito-proof tank outlet screen such as a Mozzie Stoppa Easy-Clean. All our tank overflow kits come with a mosquito-proof Mozzie Stoppa screen.