Flexcon CSS15 PRO-LITE Vertical Composite Well Tank - 15 Gallons The Pro Lite Series improves on the standard Flex Lite tank by increasing the pressure rating to 150 PSI and adding a stainless steel water connection. Like all composite tanks, the possibility of rust is elimninated and they weigh almost 40% less than a comparablely sized steel tank! Features: Top and bottom domes: Injection molded copolymer polypropylene Shell: Extruded copolymer polypropylene Outer shell: Fiberglass-wound, coated with epoxy resin Water chambers: Top diaphragm is 100% butyl rubber, lower water chamber is anti-microbial, copolymer polypropylene Base: Copolymer polypropylene Connection: Stainless steel Air valve: Easy to access brass valve with o-ring seal Testing: High pressure, seam weld, helium, final precharge check Warranty: 5 year limited Cross Reference: Pro-Source: PSC-14-4, Wellmate: WM4 Product Literature: Flexcon CSS PRO-LITE Product Literature Submittal Literature Flexcon CSS PRO-LITE Submittal Sheet