Review on 🚰 Homewerks VFF-ASP-C19PA Anti-Siphon Frost Free Sillcock, 1/2-Inch Male Thread or Solder, 12-Inch Length: Get Ultimate Protection for Your Outdoor Faucet! by John Brouillard

Pretty good window sill. Let me point out that this is not a quarter turn block. As described, it's fairly easy to install, and your local dealer has an extra low-profile gasket in case it ever needs to be replaced. They are easy to understand once you have to work with them. The only downside I see is the sill it attaches to the house, maybe a bit further around to cover the old types of non-freezing window sills you might be replacing. Also everything on the two I have installed works great. And for $15 plus change plus tax, it was a good deal. The reason I gave it 4 stars is only because I could find in the description if it was a rotary valve or a four rotary valve. Again, these are rotary valves, not quarter-turn ball valves.