Quiet and efficient. Me, the church secretary, installed it in 15 minutes. Don't be afraid to do this yourself! NOTE: after watching MANY videos, the wires from the device are just to complete a circuit - it doesn't matter which is connected to which, even though 1 wiring looks copper and one looks silver and there is nothing in the instructions about this. If you have to cut the piping/pvc that goes into the tank, DO NOT cut it to be flat - an angle is better to prevent an airlock.
Rating:
[5 of 5 Stars!]