but check your unit's rating plate first

The Apollo Conbraco 50-303-02 is CSA design-certified for a maximum operating pressure of 1/2 PSI

Durable Construction: The 200RB4S4T features a robust brass body and extended copper connections to facilitate brazing without overheating internal components

High-Pressure Capability: Rated for systems up to 250 PSI

the 30RA502112 utilizes a sensing bulb and external equalizer to modulate flow based on evaporator superheat

Lochinvar & A.O. Smith 100111008 Control 321894-708 but check your unit's ratingThe Lochinvar & A. O. Smith 100111008 Control is a critical electronic control board engineered specifically for BTH300N water heater units. This OEM component serves as the primary intelligence for high efficiency commercial water heating systems, managing complex sequences of operation including ignition, temperature regulation, and safety monitoring. As a direct replacement for the obsolete 9006231005 control board, it ensures seamless