L A Plumbing Supply Co

Solid place for plumbing parts with knowledgeable counter clerk. They sure helped me out while picking up the right part to replace valve stems in a faucet. These guys actually carry the right part where you'll probably only find off brand knock-offs that may or may not work at big box stores like Home Depot, Lowes, and Osh. Open to the public though it seems they really cater more to plumbing pros. Also, they are willing and able to point you to other shops in the area if you are looking for products they don't carry.