Williams P323011 Pilot Valve

The Williams P323011 Pilot Valve is the certified OEM direct replacement for the obsolete P172100A gas control. Engineered for high-performance standing pilot systems, this millivolt-actuated valve features a 3/8" x 1/2" NPT port configuration, making it a critical component for Williams Monterey Vented Room Heaters and top-vented wall furnaces. By utilizing a thermopile-generated millivolt signal, this valve operates independently of external electrical power, ensuring consistent heating even during utility outages.

For field technicians, the P323011 offers a robust brass construction designed to handle a maximum inlet pressure of 1/2 PSI. It is factory-calibrated for natural gas applications with a standard 4" W.C. manifold pressure setting. The internal regulator provides precise flow modulation, maintaining a stable flame at the burner assembly while the 100% safety shutoff protects the system in the event of pilot loss. Integration is seamless for veteran contractors, as the terminal block is clearly labeled for standard 750mv pilot generators.

• OEM Compatibility: Specifically designed as the drop-in P172100A replacement for the Monterey and Top Vent furnace series.
• Millivolt Operation: Requires no 120V connection; powered entirely by the standing pilot thermopile.
• Precision Regulation: Maintains a steady 4" Water Column output for consistent BTU delivery.
• Safety Certified: CSA-approved design featuring a 100% safety shutoff mechanism for reliable gas control.
• Rugged Build: Heavy-duty brass body resistant to the high-temperature environments of wall furnace cabinets.

Can the P323011 be used for Propane (LP) applications?
This specific model is calibrated for natural gas. For LP conversions, a manufacturer-approved conversion kit or the dedicated LP version must be used to ensure correct manifold pressure (typically 10" W.C.).

Does this valve replace the B67RA192 models?
No. While it replaces the P172100A, other legacy ITT or Robertshaw valves may require different port orientations. Check your specific heater model number against the P323011 compatibility list before installation.

What is the primary cause of valve failure in these standing pilot systems?
Often, "valve failure" is actually a weak thermopile or loose thermocouple connection. Always verify that the pilot generator is producing at least 600-750mv under load before condemning the millivolt gas valve.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.