Boshart SV-0NL No-Lead 1/8" MPT Snifter Valve, Low Pressure Opening

Boshart SV-0NL No-Lead 1/8" MPT Snifter Valve, Low Pressure Opening

The Boshart SV-0NL is a no-lead 1/8" MPT snifter valve engineered for low-pressure air-charging applications on hydro-pneumatic pressure tanks. Unlike the SV-1NL, which uses a heavy 60 PSI spring for general-purpose air charging with a compressor, the SV-0NL is built with a light 3 PSI spring (or no spring at all, depending on configuration), making it well suited for bleeder-type systems where air needs to be drawn into the water line to recharge a tank naturally as the system cycles. This low-opening-pressure design allows air to enter the line at a much lower threshold than a standard general-purpose valve, which is exactly what a bleeder system requires to maintain proper air-to-water ratio inside the tank over time. Installed with a 1/8" MPT connection, the valve threads directly into the tank fitting or bleeder orifice fitting typically found on well and pressure tank setups. Boshart manufactures the SV-0NL to a no-lead standard, an important consideration for plumbers and contractors working on potable water systems where lead-free components are specified. The valve is compact and self-contained, requiring no external power or manual actuation — it simply responds to the pressure differential in the line to allow air ingress when the internal spring tension is overcome.

Key Features

• Trade Size: 1/8" MPT threaded connection for direct installation into tank or bleeder orifice fittings.
• Low Pressure Opening: Light 3 PSI spring (or no-spring configuration) designed specifically for bleeder-system air charging, opening at a much lower threshold than general-purpose air valves.
• No-Lead Construction: Manufactured to a no-lead specification for use where lead-free plumbing components are required.
• Automatic Air Charging: Draws air into the water line automatically to recharge a hydro-pneumatic pressure tank as the system operates, without manual intervention.
• Simple Threaded Install: 1/8" MPT thread allows quick installation into standard tank fittings by a plumber or well contractor.
• Compact, Self-Contained Design: No external air source or compressor required for bleeder-system operation, unlike the heavier-spring SV-1NL used with a compressor.

Technical Specifications

• Country of Origin: Taiwan
• Packaging: 10 ea
• Connection: 1/8" MPT
• Spring Rating: Low pressure (3 PSI or no-spring) opening, for bleeder systems

Typical Applications

• Bleeder-Type Hydro-Pneumatic Pressure Tank Systems
• Well Water System Air Charging
• Residential and Commercial Water Pressure Tank Setups
• Replacement Snifter Valve for Tank Air Volume Control
• No-Lead Potable Water System Installations

Why Boshart?

Boshart builds the SV-0NL to a no-lead specification and a precise low-pressure spring rating so plumbers and well contractors can match the correct snifter valve to a bleeder-system application rather than relying on a general-purpose air valve like the SV-1NL. The 1/8" MPT connection keeps installation straightforward on standard tank fittings, and the compact, self-contained design means no additional equipment is needed for the valve to do its job of maintaining proper air charge in a hydro-pneumatic pressure tank.