Simplicity, versatility and dependability are the quality features found in all SUREFLOW DOUBLE DIAPHGRAM Pumps. They feature abrasive resistant alloy housing that withstands abuse. They are all easy to maintain with air valve assembly that can be checked without disassembling the pump. The simple design that can be checked without disassembling the pump. The rugged steel clamp bands are easily removed for simple maintenance. It is versatile and self-priming and is offered as submersible or fixed piping. The pump can be used as a full flow or just a trickle. We offer replaceable ball valves, reinforced diaphragms and replaceable valve seats. All pumps are available in Neoprene, Buna-N, Polyurethane, EPDM or Teflon and are available in 1 1/2″, 2″ and 3″.