Brondel sells one that's a seat, so you remove the old seat and attach this. Comes with a splitter for your incoming tank water line. So obviously it's not technical, but it works great. I use it at home. I have tile walls in my bathroom and didn't feel like running power and busting tiles out, and it is more than serviceable, and inexpensive. We have great water pressure in my house and the thing feels like it could strip paint off a starfish.