Series PDS Thermoplastic body materials shall be [PVC, CPVC, Natural Polypropylene, or Kynar PVDF] with [ 10 cubic inch capacity and 1" NPT process connection, or 50 cubic inch capacity and 2" NPT process connection, or 180 cubic inch capacity and 3" NPT process connection] Pulsation Dampener and Surge Suppressor to steady a pulsing flow caused by diaphragm pumps, piston pumps, peristaltic pumps and other quick flow interrupting equipment. Water Hammer Arrestor shall greatly reduce and prevent pipe vibration and connection leaks, damage to valves and filters, ruptured tanks and other equipment damage, as per the Plumbing and Drainage Institute Standard PDI-WH 201. Inlet screen and dome top to match selected body material. Bladder material shall be [EPDM or FKM]. Air inlet valve and gauge isolation valve (non-wetted) shall be brass. Fasteners shall be stainless steel. All units are to be 100% individually tested at the factory. As manufactured by Plast-O-Matic Valves, Inc., Cedar Grove, NJ USA.