The best space heater gas valve depends on the heater’s fuel, valve design, connection sizes, and exact replacement part number. The Robertshaw 710-502 is a strong match for specified low-capacity millivolt applications; the Durablow DV970A-710-502 is a comparable natural-gas option; and the Durablow DV970A-LP is designed for propane. For outdoor patio heaters, consider the Lemfema control valve, while the METER STAR assembly is identified for room and space heaters. Confirm the appliance manual and original valve specifications before selecting a replacement.
| Product | Best suited for | Key detail |
|---|---|---|
| Robertshaw 710-502 | Low-capacity millivolt heaters | 70,000 BTU capacity; 1/2-inch inlet |
| Durablow DV970A-710-502 | Natural-gas valve replacement | 70,000 BTU; pressure regulation listed |
| Durablow DV970A-LP | Propane heater or fireplace applications | Propane only; 3/8-inch connections |
| Lemfema Patio Heater Valve | Outdoor propane patio heaters | Thermoelectric safety control |
| METER STAR Safety Valve | Room or space heater pilot systems | Includes inlet, outlet, and pilot connections |
Robertshaw 710-502 Millivolt Gas Valve
This compact, low-profile valve is described for low-capacity space heater applications where installation space is limited. It has a stated capacity of 70,000 BTU and a 250 mV to 750 mV electrical rating. The listed 1/2-inch outlets, 1/4-inch pilot outlet tubing, standard NEMA terminals, and off-pilot-on gas cock dial provide useful specifications for matching an existing setup.
- Best for: Buyers replacing a B-67 or 710-502 valve in a compatible millivolt heater.
- Why it was selected: Its compact form and explicit space-heater application make it directly relevant to this search.
- Check before buying: Verify fuel type, connection arrangement, electrical rating, and exact part number against the appliance documentation.
The product listing describes compatibility with natural, manufactured, mixed, liquefied petroleum, and LP gas/air mixtures. That broad description does not replace confirmation that the specific appliance and valve configuration match.
Durablow DV970A-710-502 Natural-Gas Valve
This millivolt valve is listed for natural gas, with 3.5 inches water column pressure regulation, 70,000 BTU per hour capacity, a 1/2-inch NPT inlet, and an electrical rating of 250 mV to 750 mV. The listing also specifies a maximum inlet pressure of 14 inches water column and includes two 1/2-inch pipe plugs and two 1/2-inch-by-3/8-inch reducer bushings.
- Best for: A buyer whose existing natural-gas valve matches the listed 710-502 cross-reference and specifications.
- Why it was selected: It provides detailed pressure, capacity, connection, and electrical information for comparing a replacement.
- Check before buying: This model is described with natural-gas specifications. Do not assume it is interchangeable with a propane valve.
Its listed cross-references include 710-502, B-67, 05-02-00181, and several other part numbers. The product page also says to follow manufacturer directions and local codes. Confirm the exact cross-reference rather than relying on appearance alone.
Durablow DV970A-LP Propane Valve
The Durablow DV970A-LP is explicitly listed for propane gas only. It has a 3/8-inch inlet and outlet and is described as a millivolt replacement for compatible Dexen, Dexin, Robertshaw, and HHT 6003 Series 201-D applications. The listing gives dimensions of 3-13/16 inches high by 4-21/32 inches long by 1-29/32 inches wide, which can help with clearance checks.
- Best for: Buyers matching a propane-only heater or fireplace valve to the listed model or cross-reference.
- Why it was selected: It offers a distinct propane option rather than another natural-gas-focused 710-502 listing.
- Check before buying: The listing specifies propane only and 3/8-inch connections; avoid choosing it for a natural-gas appliance or mismatched pipe sizes.
Cross-references include 201-D, 6003, 710-502, and B-67, among others. Because a shared cross-reference alone does not establish a safe fit, compare the appliance’s fuel, valve configuration, and manufacturer requirements before ordering.
Lemfema Propane Patio Heater Safety Valve
This brass control valve is described for propane outdoor heaters with thermoelectric safety, including patio, tower glass-tube, and table-style heater types. The listing focuses on patio-heater applications and notes a thermocouple design. It also warns that its smooth, unthreaded thermocouple body may not match heater mounting holes designed for a threaded part.
- Best for: Owners of a compatible outdoor propane patio heater seeking a replacement control valve.
- Why it was selected: It addresses a common heater category distinct from indoor millivolt fireplace-style valves.
- Check before buying: Compare the thermocouple mounting style and hole dimensions. The listing mentions thread tape and possible mounting adjustments, so do not assume it is a direct fit.
The seller describes it as compatible with most propane heaters, but “most” is not a substitute for checking the specific heater model and valve connections. Follow the appliance manufacturer’s repair instructions.
METER STAR Room Heater Pilot Safety Valve
This main control valve is listed for gas room heaters and space heaters and includes inlet, outlet, and pilot connections with a safety component. The specified threads are M10 by 1 for the inlet, 7/16 inch for the outlet, and M8 by 1 for the pilot. Those measurements make it especially important to compare the existing assembly’s connection sizes before purchase.
- Best for: Buyers whose room-heater pilot assembly matches the listed connection threads and layout.
- Why it was selected: The product listing expressly identifies space-heater and room-heater applications.
- Check before buying: The listing does not provide a fuel type, BTU capacity, or electrical rating. Confirm those requirements with the appliance documentation or seller.
This product is an assembly-style option rather than a clearly specified 70,000-BTU 710-502 valve. Choose it only when the heater’s original part and connection details correspond to the listing.
Buying Guide: How to Choose a Space Heater Gas Valve
Does the valve match the heater’s fuel?
Start by identifying whether the appliance uses natural gas or propane (LP). The Durablow DV970A-LP listing says propane only, while the DV970A-710-502 lists natural-gas pressure and capacity specifications. Do not treat gas types as interchangeable. Check the heater nameplate, manual, and original valve markings before selecting a replacement.
How can you confirm the correct replacement part?
Use the original valve’s model number and the heater manufacturer’s parts documentation. Cross-reference numbers can help narrow the choices, but they do not prove that every dimension, fuel setting, or control arrangement is identical. Compare the complete part number, not just a similar-looking valve body.
Which connection and control details matter?
- Pipe size and thread: Compare inlet and outlet sizes, thread types, and pilot connections.
- Electrical system: Check whether the appliance uses a millivolt valve and compare its required electrical range with the valve listing.
- Pressure and capacity: Match the manufacturer’s specified gas pressure and BTU capacity.
- Mounting and clearance: Confirm the valve’s dimensions, terminal orientation, and available installation space.
- Safety controls: Check whether the appliance uses a thermocouple, pilot safety system, or another control arrangement.
Should you choose a universal-looking valve?
Not without confirming compatibility. Product descriptions may list broad brand or model coverage, but heater valves differ in fuel, connection sizes, pressure regulation, electrical operation, and pilot configuration. A valve that physically fits may still be unsuitable if its operating specifications do not match the appliance.
When should a professional handle replacement?
Gas-valve replacement involves fuel connections and appliance controls. If you are uncertain about the part, gas type, leak checks, or local requirements, contact a qualified heating professional. Follow the appliance manufacturer’s instructions and applicable local codes. Do not operate a heater with a damaged or uncertain gas connection.
Frequently Asked Questions
Can a natural-gas valve be used on a propane space heater?
Not unless the appliance manufacturer specifically approves that exact valve and configuration. Fuel type and pressure requirements must match. The Durablow DV970A-LP listing, for example, identifies that model as propane only.
Is the Robertshaw 710-502 suitable for every space heater?
No. It is described as a compact, low-capacity millivolt valve, but the heater must also match its fuel, capacity, connections, electrical rating, and part requirements.
What does a 250 mV to 750 mV rating mean?
It is the electrical rating stated for the listed millivolt valve. Compare it with the appliance’s specified control system; do not assume it applies to a heater using a different control design.
Can I identify a replacement by appearance alone?
No. Similar-looking valves may have different fuel settings, thread sizes, pressure specifications, or electrical connections. Use model numbers and appliance documentation to verify the match.
Are patio heater valves interchangeable with indoor heater valves?
Not necessarily. The Lemfema listing targets outdoor propane patio heaters with thermoelectric safety, while other products have different stated applications and connection details. Match the exact heater and valve specifications.