the 1003442 is the official manufacturer update for the 904799

The Watts 0841005 SVA Vent is a professional-grade 1/8" angle vent engineered for high-performance air removal in one-pipe steam heating systems

which leads to excessive heat and potential welding of the relay contacts

allowing for both direct and reverse action depending on your wiring configuration

meaning it will re-close the circuit once the local temperature drops below 80

Emerson Alco 061675 Expansion Valve Freon the 1003442 is the officialThe Emerson Alco 061675 (model TER 35 HW) is a high capacity thermal expansion valve engineered for heavy duty commercial HVAC and industrial refrigeration systems utilizing R22 refrigerant. Rated for 35 tons of nominal capacity, this TXV features a medium temperature charge (HC code), making it ideal for standard air conditioning and medium temp chiller applications. Technicians will find the 10 foot capillary tube length provides necessary