ensuring a seamless fit during maintenance or system overhauls

Direct 621773R Swap: Seamlessly replaces legacy part numbers

The APA151 is designed primarily for standalone applications where a fire alarm control panel is not used

Direct Compatibility: Specifically engineered for MA

Technical specs confirm a 30A-40A current rating

Lochinvar & A.O. Smith 100110589 Pressure Switch 320720-756 ensuring a seamless fit duringThe Lochinvar & A. O. Smith 100110589 Pressure Switch is a critical safety component designed for high efficiency boilers and water heaters. As a genuine OEM replacement part, this switch ensures the combustion air pressure and venting conditions meet precise operational parameters before allowing the ignition sequence to proceed. It effectively monitors the inducer draft, preventing the system from firing under hazardous conditions such as blocked