This is a Filter Gauge Adapter O-Ring designed for Hayward Perflex models EC50/EC50A/3C50AC, EC65/EC65A/D19, and EC75/EC75A Extended-Cycle DE Filters.
This Hayward part is manufactured by a Poolweb partner to meet or exceed original manufacturer specifications. This item is fully compatible and interchangeable with Hayward part # ECX1287.
