3750 Lock Open Fuel Drain Valve 3/8″-24 UNF, SAF-AIR, FAA-TSO McFarlane

Please confirm the 3750 locking fuel drain valve’s compatibility with your aircraft using this document:

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

Lock open fuel drain valves lock in the open position, which makes the pre-flight check for contamination and water in the fuel system very easy.

• Manufactured by SAF-AIR Products, Inc.
• FAA-TSO-C76 Approved
• Thread: 3/8-24 UNF
• Locking
• Flush Mounted: No
• Open Action: Push
• Use Pin Type Cup: Yes
• Material: 360 Brass
• Can be rebuilt
• Standard fuel resistant o-rings
• Effortless operation with sure grip knob
• Double sealed to prevent leakage
• A clean, no mess way to test and drain fuel

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.
Locking: Valve locks in the open position for easy draining.
Flush mounted: Valve is designed to mount flush with aircraft skin.
Use Pin Type Cup: Pin type cups similar to MCCCA-39680 may be used with indicated valves for sampling fuel.
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 valve for ease of draining fuel. The size is the hose I.D.