This is how much it leaked when it was turned "off"
Copper pipes under, turn off the valves and loosen the pipes
Loosen the hardware that attaches it
Old and rusty
Loosen the supply lines. Water will drain so have a bucket handy
Had to take the old one apart to get it off
This is the new one
I didn't know that I needed lines to run to it, so I had to run out to the store. If you're doing this, make sure it comes with them. I had to ask for a 1/2" to 3/8"
Cleaned up and ready for the new gasket
Secure using provided hardware, I didn't use a wrench, just as tight as I could with my hand
Run the new supply lines. I actually bought 2 sizes, because I wasn't sure how long I needed them. Good thing too, the one on the left used a 12" and the one on the right used a 16"