F50 Oil Drain Valve, 1/2″-14 NPT, Lycoming, SAF-AIR, FAA-PMA, McFarlane

Please use the replacement valve eligibility pages the McFarlane Aviation catalog below to confirm the F50
seal’s compatibility with your aircraft.

• Fuel system parts section of McFarlane Aviation, Inc. catalog (PDF)

The perfect choice for a close clearance engine oil drain application. Designed to clear retractable landing gears and other restrictions. Screw on the opener adapter and slightly open the valve for a sample, or fully open for complete drainage.

Include the straight attach opener P/N F50-180.

• Fits many Lycoming model aircraft
• Thread: 1/2″-14 NPT
• Locking: Yes
• Open Action: Spiral
• Material: 360 Brass, 302 Stainless
• FAA-PMA (Modification Article) Approved
• Replaces 492-172
• Manufactured by SAF-AIR Products, Inc.

Thread: “UNF” (Fine thread) type are straight, non-sealing threads that rely on an O-ring to provide a seal. “NPT” (Pipe thread) type are tapered thread that seal as they are tightened. Others are metric threads. Measure the O.D. of the thread on the valve you are replacing and compare to the thread specifications table to determine the correct thread size.
Open Action: “Spiral” valves require a push and turn action to open. “Push” valves require a push action to open.
Hose Adapter Size: A hose may be attached to the valves for ease of draining. The size indicated is the hose I.D.