Had a older faucet of this design which started leaking. Customer support sent replacement cartridges which helped. Started leaking again at the spout and again, customer support was quick to send out replacement parts. This time, however, they didn't fit because the internal design had changed. Not to worry, the customer support people came through again with a completely new faucet! I guarantee that any faucet I need in the future will be from Pfister!!