Maintain reliable water circulation and prevent air leaks on your equipment pad with an original Hayward SPX1705Z1 Housing O-Ring Gasket. Specially molded for Hayward PowerFlo II series pool pumps (including SP1705, SP1710, SP1711, SP1720, SP1725, SP1750, SP1775, and SP1780 models), this durable elastomeric seal sits between the pump body strain housing and the seal plate assembly.