System:3 Drain Adapter O-Ring size-in-gallons_501-750 This is a 1 Meter

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System:3 Drain Adapter O-Ring size-in-gallons_501-750 This is a 1 MeterThis is an o ring designed for System: 3 1 1 2 inch filter drain adapters on Sta Rite and Pentair filters. This o ring is identical to: O 83, Advance OV11332, Harmsco 930, Hayward SP4000Z1, Jacuzzi 13102306R, Pentair PacFab 274494, Sta Rite U9156, U9185, U9374, and Sta Rite SwimQuip 355051424. This o ring has been manufactured in accordance with OEM specifications and are designed to meet or exceed the original manufacturer specifications.