Using an incorrect WC rating can lead to inefficient combustion or hazardous operating conditions

How often should a MERV 11 media filter be replaced

The multi-mount configuration

Enhanced Thermal Sensitivity: Provides specialized lower thermostat calibration to ensure the bottom element activates only when necessary

As a dual power thermostat

Lochinvar & A.O. Smith 100166229 Pressure Switch 30067439-890 Using an incorrect WC ratingThe Lochinvar & A. O. Smith 100166229 Pressure Switch is a critical safety and operational component designed for high efficiency hydronic systems. This OEM replacement pressure switch is a Single Pole Double Throw (SPDT) device, factory calibrated to a 1. 25" WC (Water Column) set point. It serves as a direct cross reference for the discontinued PRS30009, ensuring seamless mechanical and electrical integration without the need for field