XS Scuba AC395 Over-Pressure Valve (OPV)
Protect your regulator hoses and inflation systems with the XS Scuba AC395 Standard Over-Pressure Valve (OPV)—a compact safety relief valve designed to vent excess intermediate pressure if a first stage begins to creep or over-pressurize. It’s a simple, proven add-on that can help prevent hose rupture and reduce the chance of a minor equipment issue turning into a bigger problem.
The AC395 is commonly used on scuba regulator first stages when no second stage is attached, and it’s also a popular choice for drysuit inflation/argon setups or “garage” regulator systems powering pneumatic tools—anywhere you want a reliable pressure-relief backstop.
Key Features
Factory set relief pressure: approximately 175–185 psi (spec sheet lists 180 ± 5 psi)
Compact relief design vents pressure during an over-pressurization event
Chrome-over-brass body with Viton O-ring(s) and stainless internal spring
Thread size: 3/8”-24 UNF (standard regulator port size)
Non-adjustable and non-serviceable for simple, set-and-forget reliability
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