Hoffman 401497 - Model 77 Water Vent Valve

Maintaining peak hydronic system efficiency requires reliable air removal, and the Hoffman 401497 Model 77 water vent valve is engineered to provide precise, automatic venting of trapped air. By preventing air-bound pipes and radiators, this valve helps ensure consistent heating output and quiet system operation throughout residential and light commercial environments.

This valve features a rugged construction designed to resist corrosion and handle the pressure demands of hydronic loops. It utilizes a precision-engineered internal float mechanism that stays closed while liquid is present and opens automatically to release accumulated air as it travels through the piping network, protecting your system from the inefficiencies of airlocks.

Key System Performance Baselines:

• Automatic Air Release: Ensures continuous, maintenance-free removal of trapped air from hydronic lines.
• Durability Engineered: Constructed to withstand high-pressure water systems and prevent premature failure.
• System Optimization: Prevents common hydronic issues like corrosion, reduced heat transfer, and disruptive water hammer.

⚠️ Application Profile: Ideal for use in baseboard radiation systems, hot water boilers, piping mains, and localized high points within hydronic HVAC circuits where air accumulation frequently occurs.

📋 Procurement & Shipping Notice

• LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
• Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?

👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.