Unfortunately, I think you are about to find out why people don't like them. Waterridge is a house brand and does not indicate who made it. It could also be Globe Union, who make some of HDs Glacier Bay and Pegasus faucets. Parts for all of the above are a stinker to come up with. You will need to pull the stem to even know what you are looking for. I think it going to be more complicated than a trip to the local big box. If you find the part, get extra - they may not be there next time.