Blue-White Industries newly designed Heavy Duty Injection Fitting features a double seal ceramic ball check valve and Duckbill type flapper valve. The Duckbill feature will resist calcification. The overall size of the injection fitting has been increased by 25 percent for added strength. Additional features include a durable valve body of polypropylene, Norprene duckbill, Hastelloy C spring, Viton O-ring seal, polypropylene adapters and insert and a ceramic ball valve. Tubing connection sizes are 0.25 or 3/8 inches. The new unit replaces existing Blue-White injection fittings at no additional charge.