Radium Roll Over Valve, 10AN ORB To 3/4" Barb

Radium Roll Over Valve - 10AN ORB to 3/4" Barb

The Radium Engineering Roll Over Valve is a safety-critical fitting designed to prevent oil from escaping the engine or catch can in the event of a vehicle rollover or inversion. When mounted in the vertical upright position, the valve allows air to flow freely in both directions — permitting normal crankcase venting. If the fitting rotates more than 90 degrees from upright, it automatically closes and shuts off all flow, containing fluids inside the engine or catch can.

This valve is most commonly used on engine vents and oil catch can vents. It is designed to be compatible with the Radium Engineering Air Filter, 0.75" ID (P/N: 18-0042, sold separately) for a complete vented and protected solution.

Important: This fitting must always be mounted in the vertical upright position for correct operation.

Specifications

• Threads: 7/8-14 UNF (10AN ORB)
• Barb OD: 0.75" (19mm)
• Valve Material: Stainless steel
• Retaining Ring Material: Stainless steel
• O-Ring Material: FKM (Viton)
• Body Material: 6061 aluminium
• Body Surface: Type-II anodised

Compatible Mating Parts

• 18-0042 — Radium Air Filter, 0.75" ID (sold separately)

Part Number:

• 20-0594 — Radium Roll Over Valve, 10AN ORB to 3/4" Barb

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ CNC-machined billet aluminium components built for performance and longevity
• ✅ Trusted by high-power build tuners and race teams worldwide
• ✅ Bolt-on fitment — no cutting, drilling, or fabrication required
• ✅ FKM (Viton) o-ring sealing — compatible with E85, pump petrol, and all exotic fuel and oil types