We had this bathroom faucet set installed several years ago. The cold water tap started dripping, so I went to my local plumbing supply store for a replacement cartridge. Big mistake! The faucet still dripped after I installed their cartridge. So I phoned Pfister. They explained that there is a lifetime warranty on their cartridges. They mailed me 2 new cartridges free of charge and directed me to online videos explaining how to install them. Problem solved! Great product, great warranty, and great service.