Lochinvar & A.O. Smith 100110883 Pressure Switch

The Lochinvar & A.O. Smith 100110883 is a mission-critical Natural Gas Low Pressure Switch designed specifically for commercial water heating and boiler applications. In high-demand environments where natural gas water heater safety is paramount, this OEM switch monitors incoming pressure to ensure the burner operates within stable combustion parameters. If the fuel supply drops below the required threshold, the switch triggers an immediate cutoff, preventing unstable flame conditions or excessive CO production often associated with inadequate gas flow.

This OEM 100110883 pressure switch is a direct replacement for low gas pressure switch kit installations in A.O. Smith BTH 300A, 400A, and 500A series units. As a veteran-grade HVAC replacement part, it is engineered for the rigors of commercial mechanical rooms and is strictly for use with natural gas systems. By maintaining precise set points, it helps technicians avoid nuisance trips while protecting the manifold pressure integrity. This switch provides a reliable safety interlock that prevents system failure due to supply fluctuations, ensuring your gas-fired appliances remain compliant with professional safety standards.

• Ensures natural gas water heater safety by preventing operation during low-pressure events.
• Direct OEM 100110883 pressure switch replacement for a perfect fit and factory-spec performance.
• Compatible with A.O. Smith BTH 300A, 400A, and 500A commercial series models.
• Rugged construction designed for high-cycle reliability in commercial boiler and water heater applications.
• Helps maintain stable combustion and prevents hazardous CO levels caused by fuel starvation.

Is this switch compatible with Propane (LP) systems?
No, the 100110883 is calibrated and designed exclusively for natural gas applications. Using this on LP systems can result in improper pressure sensing and safety hazards.

When should I replace the low gas pressure switch?
You should consider a replacement if the system is experiencing frequent safety lockouts, failing to sense incoming pressure, or if there is visible damage to the switch housing during a routine HVAC replacement part inspection.

Can I use this on residential A.O. Smith heaters?
This part is specifically engineered for commercial-grade units like the A.O. Smith BTH 300A series. Always verify your specific model and serial number to ensure correct fitment before installation.

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.