The Standing Water Level Airline Kit is an airline that has an air valve and pressure gauge at the top of the bore and the other end of the airline is at the pump-just taped to the poly pipe.
You then use an air compressor to pump air into the line until you hear air bubbles coming out of the bore hole. Disconnect the air compressor and read the pressure gauge this will tell you how much water in meters is above the pump.
When the pump starts up and the water level drops, so does the pressure in the gauge. When the pump turns off and the water level rises so does the pressure in the gauge.
It is a good idea to connect the air compressor to the airline and pump up every time you want to read it just to make sure there hasn’t been an air leak as this will give you a false reading.
All you need is the Airline SWL kit + air tube 100m (if the pump is less than 100m deep). If it is deeper than 100m then you will need an extra roll of air tube and the Connector.