Is A Sediment Trap Necessary?

Is A Sediment Trap Necessary? According to the 2016 California Plumbing Code (CPC), sediment traps are required for all gas appliances except: illuminating appliances, ranges, clothes dryers, decorative appliances for installation in vented fireplaces, gas fireplaces, and outdoor grills. Those are quite a few exceptions. What is the purpose of a sediment trap? DEFINITION AND