The 559PE seal is significantly more resistant to chloramine than standard seals. This seal is black in color with an identifying green hash mark on the side. This seal is a genuine Fleck part, and is compatible with 4650/5600/6600/6700/9000/9100/5000ProFlo valves.
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*Free shipping to the Contiguous United States. (Lower 48 states only. Does not include Alaska or Hawaii.)