This part is the switch assembly only

Can this be used for round or square shafts

the D4S is specifically rated for low-flow duct detection

The Hydrolevel 500SV Low Water Cut-Off is a 24Vac safety control specifically engineered for commercial hot water boilers and secondary protection on steam systems

Its robust construction is engineered to withstand the rigorous cycling of modern condensing furnaces

Modine 5H0719330001 Gas Valve Refrigerant This part is the switchThe Modine 5H0719330001 Gas Valve is the direct OEM replacement for 5H71933 1, engineered specifically for Modine unit heaters, furnaces, and boilers. As a 24V natural gas valve, it operates with a 3. 5" WC manifold pressure setting to ensure stable combustion and precise fuel regulation. This 1 2" NPT gas valve features a standard 1 2 inch inlet and outlet, making it a drop in Modine replacement part for technicians performing maintenance on Hot Dawg