Choosing the right propane heater valve matters for safety, compatibility, and performance. Below is a quick comparison of reliable replacement valves and kits for water heaters, pool heaters, patio heaters, and commercial propane equipment. Each review highlights compatibility, key features, and installation notes to help you narrow choices.
| Product | Type / Use | Key Feature |
|---|---|---|
| Reliance Water Heater LIQUID PROPANE Gas Control Valve 100112330 | Residential Water Heater Valve | Thermostat compatible; OEM fit for AO Smith/State |
| Reliance Water Heater Liquid Propane Gas Valve 100112338 | Residential Water Heater Valve | Replacement for older AO Smith models; model 9007890 |
| Hayward FDXLGSV0002 FD Propane Gas Valve | Pool Heater Valve | Fits Hayward Universal H-Series Low NOx pool heaters |
| Lemfema Propane Gas Patio Heater Repair Kit | Patio/Outdoor Heater Valve & Safety Kit | Includes thermocouple, dump switch, and main control valve |
| Raypak 003899F Millivolt Gas Valve | Propane Heater Replacement Valve | Millivolt-compatible valve for Raypak heaters |
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Reliance 100112330 Gas Control Valve
This control valve is positioned as a direct replacement for certain A.O. Smith, Reliance, State, and American branded water heaters. The listing advises providing the model and serial number of your water heater to confirm correct fitment.
- Compatibility: OEM-style replacement for specified heater brands and models.
- Installation note: Confirm model/serial before ordering to ensure proper thermostat and control match.
- Use case: Best for residential tank water heaters that require an exact gas valve replacement.
Reliance 100112338 Liquid Propane Valve
This replacement valve, sold under Reliance and manufactured by Resideo for AO Smith brands, is identified by part numbers 100112338 and 9007890. The product listing notes manufacturing origin and part cross-reference.
- Compatibility: Intended for older AO Smith and related water heater models using part 9007890.
- Features: Standard replacement valve design aimed at restoring normal gas control functions.
- Consideration: Verify original part number and physical connections before replacing to prevent fitment issues.
Hayward FDXLGSV0002 Pool Heater Valve
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Designed specifically for the Hayward Universal H-Series Low NOx pool heaters, this valve lists compatibility with numerous H-Series models including H150FDN/P through H400FDN/P.
- Compatibility: Matches Hayward H-Series low NOx models across a wide power range.
- Use case: Replacement for pool heater systems where factory-fit components are preferred.
- Installation tip: Confirm model number of your Hayward heater; pool heaters require correct valve calibration for safe combustion and emissions.
Lemfema Patio Heater Repair Kit Valve
This kit targets outdoor propane patio heaters and includes a main control valve with pilot port, thermocouple, and safety switch components. Thread dimensions and compatibility details are provided for fitting checks.
- Compatibility: Fits propane patio heaters with thermoelectric safety; not for natural gas models.
- Dimensions: Inlet Female M10*1 and outlet 7/16”-24UNF; pilot connection M8*1.
- Included parts: Control valve, thermocouple, and dump switch; gold-plated connectors for better conductivity.
- Installation note: Threads may require tape; thermocouple mounting may differ from originals and could need minor modification or epoxy stabilization.
Raypak 003899F Millivolt Gas Valve
The Raypak 003899F is listed as a millivolt-compatible gas valve commonly used in Raypak heater models. Millivolt systems rely on a thermopile/thermocouple power source rather than external electric ignition.
- Compatibility: Typically used with Raypak propane heaters that use millivolt controls.
- Application: Appropriate for pool, spa, and some residential heater configurations requiring millivolt valves.
- Installation note: Confirm system type (millivolt vs. electronic ignition) to ensure proper valve functionality.
Buying Guide: How To Choose A Propane Heater Valve
Selecting the right propane heater valve requires attention to compatibility, safety features, and installation fit. Below are the primary considerations and comparison perspectives to guide a correct purchase.
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Compatibility And Fitment
- Model And Serial Numbers: For water heaters and OEM replacements, use the appliance’s model and serial numbers to match the exact valve variant.
- Thread Sizes And Connections: Verify inlet/outlet thread types (e.g., M10, 7/16”-24UNF, 3/4” IPS) and whether fittings are female or male.
- System Type: Determine whether your system is millivolt, thermocouple, electronic ignition, or direct thermostat-controlled to match valve functionality.
Safety And Regulatory Considerations
- Thermocouple/Thermopile Compatibility: Ensure the valve supports the existing flame-sensing hardware.
- Built-In Safety Features: Look for valves that include pilot ports, dump/tilt switches, and approved safety certifications for your device class.
- Local Codes: Check local plumbing and gas codes; some installations require licensed professionals.
Material, Durability, And Environment
- Materials: Brass and coated metals resist corrosion; ensure the valve material suits outdoor or pool-side exposure if applicable.
- Operating Pressure: Confirm valve is rated for low-pressure propane use where required (patio heaters often use low-pressure valves).
- Environmental Rating: For outdoor heaters, ensure components are rated for humidity and UV exposure.
Installation And Maintenance
- Ease Of Replacement: OEM-fit valves usually minimize setup complexity; universal kits may need adapter fittings or thread modification.
- Tools And Supplies: Thread tape, proper wrenches, and leak testing solution are typically needed; consider hiring a pro if unsure.
- Serviceability: Choose valves for which replacement parts (thermocouples, switches) are available to extend equipment life.
Comparison Perspectives
- OEM vs. Aftermarket: OEM valves prioritize fit and certified performance; aftermarket kits may offer broader compatibility and lower cost but require careful fit checks.
- Specialized Valves (Pool vs. Patio vs. Water Heater): Pool heaters and water heaters often need calibrated valves for combustion and emissions control; patio heaters emphasize low-pressure thermoelectric safety.
- Replacement Complexity: Some valves are plug-and-play while others require pilot tube alignment and thermocouple adjustments; check whether your repair requires welding, brazing, or simple threaded connections.
Final Purchase Checklist
- Confirm appliance model and serial number and the original part number when possible.
- Match system type (millivolt vs. electronic) and thread/connect sizes.
- Verify included components (pilot ports, thermocouples, switches) meet your heater’s configuration.
- Consider professional installation for gas connections or if local code requires it.