Best Gas Valves for an Intermittent Pilot System
Intermittent pilot systems rely on reliable gas valves to deliver safe, efficient ignition and flame control. This guide highlights five compatible options from trusted brands, focusing on rapid ignition, adjustable flow, and compatibility with natural gas and propane. Each product is suitable for residential or light commercial applications, including direct vent fireplaces, stoves, and boilers. Below is a quick reference table to compare key features at a glance.
| Product | Brand | Key Feature |
|---|---|---|
| VR8345M-4302 Universal Gas Valve | Honeywell | Direct ignition or intermittent pilot; 24 VAC |
| SV9502H2522 Intermittent Pilot Valve | Honeywell | Pilot-off when not in use; 24V AC |
| 712-017 Pilot Ignition System | Robertshaw | Converts standing to intermittent pilot; complete kit |
| 700-506 Millivolt Valve Replacement | MCAMPAS | Millivolt compatible; natural gas operation |
| SIT-820 Nova Series Valve | Allparts Equipment & Accessories | Millivolt gas control for direct vent gas appliances |
This article presents five products that align with intermittent pilot systems, outlining practical details to help you compare suitability for your setup. Each section provides a concise overview, key features, and installation notes to support informed decisions.
Honeywell VR8345M-4302 Universal Gas Valve
The Honeywell VR8345M-4302 is designed for versatile ignition control in modern heating systems. It supports either direct ignition or an intermittent pilot and operates at standard 24 VAC. The unit ships with reducer bushings for 3/4 x 1/2 inch connections and a Natural to LP conversion kit, making installation adaptable to different gas supplies. The pressure regulator setpoint is 3.5 inches water column, offering stable flame control across varying inlet pressures. This valve is suitable for residential furnaces, boilers, and direct-vent appliances that require reliable ignition and safe shutoff.
Honeywell SV9502H2522 Intermittent Pilot Valve
The SV9502H2522 is a compact intermittent pilot gas valve designed to ignite the main burner efficiently while keeping the pilot circuit off when not needed. It provides reliable ignition at 24V AC and is optimized for slow opening to reduce ignition surge and wear. This configuration helps minimize fuel use during ignition and improves overall system safety by ensuring the main burn only starts when the pilot is confirmed, reducing the risks of gas escape or overheating during startup.
Honeywell SV9501M2528 Intermittent Hot Surface Pilot Ignition
The SV9501M2528 offers a smart valve control approach for hot surface ignition. This model is designed to work with intermittent pilots and integrates with the broader Honeywell control ecosystem, enabling precise burner on/off sequencing. The design emphasizes dependability in residential heating equipment, including furnaces and direct-vent appliances. It is suitable where a hot surface ignition method is preferred for consistent flame initiation and improved safety during startup cycles.
Robertshaw 712-017 Pilot Ignition System
The Robertshaw 712-017 is a complete pilot ignition conversion kit that supports converting conventional standing pilot systems to intermittent pilot operation. It is suitable for residential and commercial heating equipment and includes essential components like the 720-070 valve, 780-715 module, wiring harness, spark/sensor probe, and mounting hardware. This system enables an efficient, safer ignition workflow, reducing continuous pilot gas consumption while maintaining reliable flame initiation for a wide range of appliances.
MCAMPAS 700-506 Millivolt Valve Replacement
The MCAMPAS 700-506 is a millivolt gas valve replacement designed for compatibility with Robertshaw and similar direct-vent or millivolt systems. It supports natural gas operation with a stated flow range suitable for 180,000 to 360,000 BTU, making it appropriate for mid-sized heaters or gas fireplaces with millivolt controls. The valve provides precise piloting control and safe operation within the millivolt range, offering a convenient retrofit option for older equipment seeking intermittent pilot performance.
Allparts SIT-820 Nova Series Millivolt Valve
The SIT-820 Nova Series millivolt valve from Allparts Equipment & Accessories is designed for Propane LPG direct vent applications. It is compatible with major brands and offers adjustable flame control with both high and low settings. The quick drop-out pilot circuit enhances safety by quickly shutting off the pilot when a low flame is sensed. This valve is well-suited for direct vent fireplaces, stoves, and gas logs that rely on millivolt control for ignition and flame regulation.
Buying Guide
Key considerations when choosing a gas valve for an intermittent pilot system include gas type compatibility (natural gas vs. propane), operating voltage (typically 24 VAC), ignition method (intermittent pilot vs. hot surface vs. standing pilot), and the ability to convert or adapt to existing piping and fittings. Safety features such as pilot shutdown on low flame, rapid cut-off, and compatibility with quick-drop ignition circuits are important for reducing fuel waste and ensuring reliable startup.
- Gas type and pressure compatibility: Verify inlet/outlet pressures and ensure the valve supports your supply. Some valves include conversion kits or can be paired with regulators for LP or natural gas.
- Ignition method: Intermittent pilot valves save gas by only lighting when needed, while hot surface pilots offer rapid ignition using a heated element. Choose based on appliance type and desired ignition speed.
- Electrical requirements: Most modern valves operate at 24 VAC. Confirm your control board or thermostat can drive the valve reliably without voltage drop.
- Installation compatibility: Look for valves with common connection sizes and included adapters or reducers to fit standard 3/4″ x 1/2″ piping, reducing installation effort.
- Safety features: Quick drop-out pilots, pilot-off when not in use, and compliance with appliance standards help minimize gas waste and reduce risk during startup and shutoff.
- Maintenance and support: Choose brands with wide availability of service parts, documentation, and installation support to simplify future repairs.
In summary, the VR8345M-4302 from Honeywell, SV9502H2522 intermittent pilot valve, Robertshaw 712-017 system, MCAMPAS 700-506 replacement, and Allparts SIT-820 are robust options for intermittent pilot applications, each offering distinct advantages depending on your appliance type, fuel, and installation constraints. When selecting a valve, prioritize compatibility with your gas type, ignition method, and the electrical control signals your system uses.