Forespar Marelon Ball Valve

These MF 850 Ball Valves have NPS straight (aka parallel) threads at each end, and are designed to be fitted with straight thread thru-hull or pipe fittings. Straight threads are not "self-sealing". You must use pipe joint compound, thread seal compounds, or "Teflon tape" to seal the threads when making connections. Features: Lightweight, yet extremely strong injection-molded parts. For use above or below the waterline. NPS parrallel (straight) threads. Completely free from electrolysis or reaction to any metals - no electrical bonding required. Completely free from any corrosion. Minimal maintenance requirements - requires periodic lubrication. Accepts adhesives and coatings (bottom paint) easily. Can be used on aluminum, steel, wood, or fiberglass hulls. Can be used with metal fittings. Long term reliability.