90256500 PACKING

SKU: 4056

Packing 90256500 is a high-pressure water seal for triplex plunger pump heads — one of the cup-style rings that encircles each plunger and holds back discharge pressure through every stroke. Like all packings, it wears from friction against the reciprocating plunger, and failure shows as water leaking from the head or pressure that fades under load. Packings are always serviced as complete matched sets across the seal stack, since a single new ring among worn ones will not seal evenly. Fitment is exact: confirm part number 90256500 on your pump's parts diagram and check your plunger diameter before ordering.