Flexcon Bladder Pressure Tanks have an appliance-quality paint finish for indoor and outdoor installation. The top water chamber is 100% butyl rubber, and the lower water chamber is copolymer polypropylen. Flexcon tanks have a welded steel NTP thread connection and a brass air valve with o-ring seal.
Elbi Bladder Pressure Tanks have an ultra grade polyester powder coating that doesn’t experience UV Ray deterioration. Elbi tanks have an improved diaphragm retaining ring, heavier gauge metal, and stainless steel water fittings and elbows.