Honeywell 1311-102 Zone Valve 3/4 Inch 24V 3-wire

Product Description

The HONEYWELL 1311-102 is a 3/4-inch, 24-volt, 3-wire zone valve designed for hydronic heating and cooling distribution systems. It controls the flow of hot or chilled water through individual zones, allowing independent temperature control in residential and light commercial applications. The sweat-connection end fitting integrates directly into copper piping. Licensed HVAC technicians and plumbers are the typical installers for this type of zone valve. Key specs include a 3/4-inch sweat connection, 24-volt control voltage, and a 3-wire wiring configuration that supports end-switch operation for circulator pump or boiler control.

This valve is suited for hydronic radiant floor systems, baseboard heating loops, and fan-coil unit piping in zoned hot-water or chilled-water systems. The 24-volt low-voltage control signal is compatible with standard zone control boards and thermostats used in residential and light commercial hydronic systems. The 3-wire configuration provides an end switch that signals the system controller when the valve has fully opened, enabling proper sequencing of the circulator or boiler. Typical installations involve multiple zone valves operating from a central zone controller or relay panel.

Key Features

• 3/4-inch sweat (solder) connection for direct integration into copper piping
• 24-volt operating voltage compatible with standard low-voltage zone controls
• 3-wire design with end switch for circulator or boiler enable signal
• Suitable for hydronic heating and chilled-water cooling distribution
• Compact valve body sized for residential and light commercial zoning applications

Compatibility

Designed as an OEM-style replacement zone valve for 3/4-inch copper hydronic piping systems operating on 24-volt low-voltage controls with 3-wire zone board configurations.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Shut down the boiler or chiller and depressurize the hydronic loop before cutting into the pipe and soldering the sweat connections. Allow the valve body to cool completely after soldering before energizing the actuator, as excess heat can damage internal components. Low-voltage wiring should comply with NEC Class 2 requirements and the zone control manufacturer wiring diagram.

Technical Specifications

• Connection Size: 3/4 inches
• Connection Type: Sweat (solder)
• Control Voltage: 24 volts
• Wiring Configuration: 3-wire with end switch

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: 1311-102