Volvo Penta 860402 Non-Return Valve / Anti-Siphon Y-Body - Used

Application: Volvo Penta marine diesel non-return / anti-siphon Y-valve, OEM part number 860402 (replaces 3851019), used in raw-water and exhaust/water-lift plumbing to prevent back-flow into the engine. Molded PA66 glass-filled nylon Y-body with internal flapper and bolted service cap. Condition: Used take-off in good serviceable condition — light dirt and verdigris staining from adjacent bronze fittings, no visible cracks, flapper intact. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.