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Aqua-Flo XP2/XP2e barrel union O'ring.
O'ring is approximately 69mm in diameter and 3.5mm in thickness.
These O'rings do not suit different model pump unions.
Balboa/Gecko 50mm Heater Union O'ring
O'RING: Davey/Spa-Quip 50mm Union
Series 1000 Filter Lid O'Ring
O'RING: Davey/Spa-Quip 40mm Union
Q'RING: Davey QB Pump Union