Piper J-3 Fuel Valve

This fuel shut-off valve assembly is identified by manufacturer part number U70781-000 and Roctexo part number RX1-05-00848. Univair describes the valve as a replacement fuel valve for Piper J-3 and selected related aircraft applications.

The valve features a stainless-steel ball seated in an inert composite seat, providing an updated alternative to the original valve design. It uses a steel handle intended for the original push-pull shut-off control and has 1/4 in NPT connections.

• Manufacturer: Univair Aircraft Corporation
• Manufacturer part number: U70781-000
• FAA-PMA approved, as stated by the manufacturer
• Supersedes: 70781-000, 70781, 70781-00 and A7220
• Listed applicability: Piper J-3, L-4, NE-1, NE-2, J-5, AE-1 and HE-1

Installation note: According to the manufacturer, the valve is not fully port-open when its handle is in the open position. Refer to the manufacturer’s U70781-000 Installation and Maintenance Instructions and confirm part-number applicability, approved data and regulatory eligibility for the specific aircraft before installation.