Strainer Cover O - Ring SPX4000S

This is the Third version for the North Star Pump Lid O-Ring. This part only fits pump dome lids with the part number SP4000D2 embossed on the underside of the dome, NOT the black collar. The complete dome lid, black collar and o-ring is part # SPX4000CLO. This also ONLY fits pumps Absent of the suffix NS on the pump housing. EX. This lid fits SP4015 pump housings, NOT SP4015NS.