Emerson QT075C2 2-way Zone Valve 0.75in Sweat 24V End Switch

Product Description

The EMERSON QT075C2 is a 2-way motorized zone valve designed for residential and light commercial hydronic heating systems. It features a brass valve body with a 0.75 inch sweat (copper) connection and operates on 24 volt control power. The integrated motorized actuator opens and closes the valve in response to zone thermostat calls, providing precise zone isolation within a hydronic loop. An integrated end switch signals the boiler or circulator pump to fire once the valve reaches the fully open position. Licensed plumbers and HVAC technicians install this valve as part of zoned hot-water heating systems.

The QT075C2 is suited for zoned hydronic heating applications using 0.75 inch copper sweat piping. It fits standard residential hydronic loops where multiple zones are controlled independently by separate thermostats. The end switch function makes it compatible with system designs that rely on the zone valve to trigger boiler firing or circulator operation rather than a separate aquastat or flow switch. It is appropriate for both new-construction installs and retrofit zone-control upgrades on existing hydronic systems.

Key Features

• Brass valve body provides durability and corrosion resistance in hydronic loop service
• 0.75 inch sweat connections integrate directly into standard copper-pipe hydronic systems
• 24 volt actuator is compatible with standard low-voltage zone thermostats and zone control boards
• Integrated end switch triggers boiler firing or circulator pump activation when valve reaches full open
• 2-way design provides clean zone isolation and controlled flow shutoff

Compatibility

Designed as an OEM-style replacement or direct-install zone valve for residential and light commercial hydronic heating systems using 0.75 inch copper sweat piping and 24 volt control circuits.

Installation Notes

Installation is performed by a licensed plumber or HVAC technician familiar with hydronic system piping and low-voltage wiring. Shut off system water pressure and drain the affected loop before cutting into the supply line. Complete all soldering on the sweat connections and allow the valve body to cool fully before attaching the actuator assembly, as heat can damage the actuator and internal components. Low-voltage wiring to the end switch and actuator should comply with NEC requirements and the thermostat or zone-control manufacturer wiring diagram.

Technical Specifications

• Connection Type: Sweat (copper)
• Connection Size: 0.75 inches
• Valve Configuration: 2-Way
• Control Voltage: 24 volts
• Actuator Type: Motorized
• End Switch: Integrated
• Body Material: Brass

Standard Information

• Brand: EMERSON
• Manufacturer Part Number: QT075C2