I have used 20mm clear acrylic tubes and plumbing connectors to make a water level indicator to show the real water level of the rainwater tank.
I have ordered the acrylic tubes more eBay and all plumbing parts from Bunnings. Making use one the outlet of the tank and drill a 20mm hole at the top of the tank and screw in a 20mm brass connector. The rest is connecting the pipe as usual.
