We are upgrading bathroom fixtures. We had the Delta Monitor 1500 series. While the Tesla Faucet will work for a replacement to the 1500 series. The cartridge it is supplied with can not be used for the 1500 series upgrade to the 1700 series. You need to purchase RP32104 cartridge for the old valve. Any question email Delta, they are excellent at responding and letting you know what you need to upgrade your fixtures.

Fast shipping and well made product.

Great looks and finish and the installation was easy. My only complaint is the water temperature knob has too much play in it. It is a little difficult to dial in the exact temperature I sometimes want. You try to move it a just a tad and it will jump to a higher or colder adjustment than you wanted. You get used to it and it is not a huge deal. I would purchase it again.

Love it!