Space Heater Millivolt Gas Valve For: Empire, Williams 710-502, 7000MVRLC, 731701424, 740701401

Space Heater Millivolt Gas Valve For: Empire, Williams 710-502, 7000MVRLC, 731701424, 740701401

Safety first: Installation must be performed by a qualified gas-service technician. Isolate electrical power and fuel before service, never bypass flame-safety controls, and complete required leak, ignition, and combustion checks before returning the heater to service.

Restore heating control with this ERP replacement millivolt gas valve for compatible Empire and Williams space heaters. This low-capacity 710-series control generates its own power from the pilot, so it operates the main burner from a millivolt thermostat without house power. When the valve fails, the pilot may burn but the main burner will not open, or the heater will not respond to the thermostat. It is rated 250-750 mV with 1/2-inch inlet and outlet, nominal 70,000 BTU capacity, and 3.5-inch water-column natural-gas regulation. Match the full equipment model, gas type, and control configuration before ordering.

Product Details

• SKU: ER710-502
• Country of origin: China
• Type: Millivolt, 250-750 mV
• Connections: 1/2-inch inlet and outlet
• Capacity: Nominal 70,000 BTU
• Regulation: 3.5-inch water column, natural gas

Compatible Part Numbers

• 710-502
• 7000MVRLC
• 731701424
• 740701401

Key Features

• Direct replacement: Replaces the listed millivolt gas valve part numbers.
• Self-powered control: Millivolt design runs the burner from the pilot generator without house power.
• Correct gas regulation: 70,000 BTU capacity with 3.5-inch water-column natural-gas regulation.
• Standard connections: 1/2-inch inlet and outlet match the original control.

Fixes These Symptoms

• Pilot burns but the main burner will not light
• Heater will not respond to the millivolt thermostat
• Heater shuts off or produces no heat with a gas-control fault

Compatible Brands

Empire, Williams

Compatible Models

Fits various models. Please verify compatibility with us before ordering

Installation Instructions

1. Shut off the gas supply and isolate electrical power to the heater.
2. Confirm the gas type, valve ratings, sensing arrangement, and control revision.
3. Disconnect gas, pilot, and thermocouple connections from the old valve.
4. Install the new valve, reconnect the pilot and thermogenerator, and leak-test every connection.
5. Complete required ignition and combustion checks before returning the heater to service.

Ignition, flame-proving, and gas-control faults require professional diagnosis; replacing this component will not correct every no-heat condition.

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Safety Disclosure

Prop 65 Warning: Cancer and Reproductive Harm – www.P65Warnings.ca.gov