High-performance, high-value vessels for residential and light commercial reverse osmosis applications. Specifically designed for reverse osmosis systems, these small vessels offer big advantages over competitive tanks via 100% seamless, composite construction. 100% seamless composite construction Certified to NSF/ANSI/CAN 61 Meets stringent US requirements for water components Environmentally safe, 100% lead-free Will not introduce chemicals or elements into water Durable PVC drain assembly