Profile: Jacobsen, Inc. Of Adair is a wholesaler of plumbing supplies. Our product line includes angle & straight valves, straight connector, stainless steel crimp rings, Endura® grease interceptor and plumbing fittings. Our Endura® grease interceptor is injected molded-in engineered copolymer thermoplastic. The Endura® can support 440 lbs (200kg) of pedestrian and light duty traffic load. Our pipe clamps are durable, U.V. resistive, non-corrosive, and enclosed in black polyethylene. The split design snaps onto copper, CPVC, or PB tube as an isolating clamp.