Johnstone Supply Valencia

Won't sell to the home owner only wholesale. They want you to call a contractor. If you don't need a part the same day just go on the internet and get it cheaper anyway

Won't sell to end users, only contractors. Doesn't say so on their website.

I've been coming to this business for about 6 years and have had the best costomer service and the best prices around. They will help with any questions or concerns about product.