My Delta faucet had gotten extremely temperamental, taking many minor adjustments in the handle position to find that sweet spot where it would completely shut off. Decided to fix it, searched online for what I'd need before heading to the hardware store, and found this parts page. I noted that Delta reached out to many reviewers, speaking of Delta's warranty, so I went to the "Contact Us" and sent a little note about my issue. Delta sent me the cartridge for free under warranty, and it works perfectly! It was also dead simple to replace. It was a five minute fix, and that included the time to turn the water off and back on, and run to the basement for tools.