Lochinvar & A.O. Smith 100166300 Pressure Regulator

The Lochinvar & A.O. Smith 100166300 Pressure Regulator serves as a critical OEM replacement part for managing pilot gas pressure in high-efficiency commercial boilers and water heaters. Professional contractors recognize this component by its alternative part number, PRV2010, with which it is technically identical. Engineered for precision, this natural gas regulator ensures the burner assembly receives a stable, regulated flow, preventing flame instability or lockout conditions often caused by fluctuating manifold pressures. Designed specifically for the Lochinvar Copper-Fin II and various A.O. Smith industrial units, it integrates seamlessly into the 24 VAC control circuit. This HVAC pressure valve is essential for maintaining the 85% thermal efficiency standards required in modern hydronic systems. When performing a boiler pressure regulator replacement, using this genuine Lochinvar PRV2010 part preserves the integrity of the original gas train configuration and satisfies technical specifications for models ranging from the 665 to the 3080 series.

• Universal Compatibility: Directly replaces both 100166300 and PRV2010 part numbers across a wide range of Lochinvar and A.O. Smith equipment.
• Precise Pilot Control: Stabilizes pilot pressure to ensure consistent ignition and reliable flame proving.
• Rugged Construction: Built with high-grade materials to withstand the high-temperature environments typical of commercial gas water heaters.
• Downtime Mitigation: Standardized multi-pin connectors allow for rapid troubleshooting and efficient field replacement.

Is the 100166300 compatible with both Natural Gas and LP applications?
While primarily utilized in natural gas configurations, always refer to the specific boiler's rating plate; certain high-altitude or LP conversion kits may require specific adjustments to the gas regulator settings.

What are the symptoms of a failing PRV2010 pilot regulator?
Technicians typically observe intermittent pilot outages, delayed ignition, or erratic manifold pressure readings. If the pressure regulator cannot maintain the required WC (Water Column) output, the system's integrated control module will likely trigger a safety lockout.

Can I use an aftermarket regulator instead of the 100166300?
For HVACR compliance and system reliability, we recommend only genuine OEM parts. This ensures the flow rates and internal spring tensions match the factory-tested combustion profile of your Lochinvar or A.O. Smith unit.

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.