A. Because of our large selection (we believe we have the largest selection of PVC fittings on the Internet), our large volume, and because sometimes manufacturers are out of sizes and/or products (we have over 98% of the above products in stock at all times), we get our fittings/valves from many PVC fittings/valves suppliers. We guarantee top quality fittings/valves by U.S. PVC fitting suppliers, but please be aware that the fittings/valves that we send will not necessarily all be from one brand or one manufacturer. If you must have ("insist on") one specific brand of PVC manufacturer's fittings/valves, please specify that clearly on your order form (where we allow space for you to write notes to us when you are placing your order); and then we will let you know if that is possible before we ship your order.