Liquidator-2 Tank Level Gauge Requires a length of 2" PVC or other round or square pipe (not included), equal to the tank height, for the guide pipe. True Reading: Shows the accurate water level in the tank, unlike homemade pulley systems which go up when the water level goes down. Highly Visible: The bright aluminium indicator with its red band can be seen from hundreds of feet away. Easy to Install: All necessary items (template, instructions and hardware) are provided to make it easy for the handyman to mount the Levetator on the tank roof. Simplicity: No gimmicks, no batteries, just a simple float/weight/pulley system. Versatile: Equipped for tanks up to 10 feet high. Optional extension available for taller tanks.