Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Installs easily, quickly and really quiet!

The hydroclean HC660 cleaned out the sediment in the tank in just 2 flushes. I had to use my channel lock wrench to get off the old valve, but the new valve had "wings" on the nut that made it easy to install without tools and the nut "clicks" when fully tighten so you don't accidentally over-tighten and damage the plastic housing! It fills the tank quickly and quietly. You can hardly hear the tank is filling its that quiet. I purchased the hydroclean HC660 at the local big box hardware store for around $12 and its well worth the $4 extra over the same cheaper valve that was replaced! I am seriously think about replacing the valve in the other bathroom even though it still works! Saving water is important and saves money too.