Watts 111Z-10 Air Relief Valve

Description:

The Watts 111Z-10 Air Relief Valve is a 1/2 inch automatic air relief valve rated for 15 PSIG service, designed to automatically vent trapped air from closed-loop liquid systems to maintain efficient system operation and prevent air binding. Commonly installed in hydronic heating systems, hot water boilers, chilled water systems, HVAC equipment, circulating pump systems, process cooling loops, and commercial mechanical room installations. Maintenance personnel, HVAC contractors, boiler technicians, OEMs, and facility operators use this valve for preventive maintenance, system upgrades, replacement projects, and new installations requiring reliable automatic air elimination.

Applications:

The Watts 111Z-10 Air Relief Valve is widely used in commercial and industrial hydronic heating systems, hot water boiler plants, chilled water distribution networks, HVAC circulation systems, district energy systems, process cooling equipment, heat exchangers, pumping stations, institutional facilities, manufacturing plants, schools, hospitals, apartment complexes, and mechanical equipment rooms. The valve automatically removes accumulated air pockets that can reduce system efficiency, create noise, restrict flow, accelerate corrosion, and cause pump cavitation. It is commonly specified in closed-loop liquid systems where continuous air elimination helps improve heat transfer performance, maintain proper circulation, reduce maintenance requirements, and extend equipment life.

Technical Specifications:

• Brand: Watts
• Model: 111Z-10
• Product Type: Automatic Air Relief Valve
• Valve Size: 1/2 in.
• Connection Type: NPT Threaded
• Service Rating: 15 PSIG
• Function: Automatic Air Venting and Air Elimination
• Operating Type: Float-Controlled Automatic Vent
• Application: Hydronic Heating and Cooling Systems
• Service Media: Water and Compatible Closed-Loop Fluids
• Installation: Vertical Mounting Position
• System Type: Closed-Loop Liquid Systems
• Typical Use: Boiler, HVAC, and Process Piping Systems
• Construction: Industrial Service Design
• Maintenance Purpose: Removal of Trapped Air and Gas Accumulation
• Industry Applications: Commercial, Institutional, and Industrial Facilities

Common Replacements:

• Watts FV-4M1 Automatic Air Vent
• Taco Hy-Vent 400 Series Air Vent
• Bell & Gossett 87 Series Air Vent