I don't know enough about plumbing to know how to rate this, but our plumber said it was great and worked as promised for the shower faucet we chose to install. Wayfair recommended this to go with the faucet we chose, so we took for granted that it was the correct one; I love that they make recommendations so one doesn't have to go hunting for something. It took a little longer to arrive than I would have liked, so just be aware of that if you need one of these to install your faucet.