- Hollis Over-Pressure Relief Valve for First Stage:
- Compact Relief Valve Design
- Releases Pressure in Event of Over-Pressurization of First Stage
- Factory Set: 175 to 185 psi (12 to 12.75 bars) for Pressure Release
- Fits Standard 3/8-24 UNF Low Pressure Regulator Port
- Chrome Brass Construction
- Stainless Steel Internal Spring
- Used by Technical and Serious Divers
- Protect Regulator Components
- O2 Ready to 100% Oxygen
- Great Safety Item