McDonnell & Miller 51-2-HD Control 30067439-890 Durable Bronze Housing: Resists corrosion

Durable Bronze Housing: Resists corrosion and mechanical stress better than standard brass alternatives in commercial gas piping

The permanently lubricated sleeve bearings and corrosion-resistant impeller housing are designed to withstand the acidic condensate and high temperatures characteristic of modern high-efficiency heat exchangers

The Rheem-Ruud 60-22525-06 Gas Valve is a 1/2" NPT pilot gas valve engineered for specific residential and light commercial forced-air furnaces

The Wayne 100950-001 Tune Up Kit is a comprehensive field-service solution engineered specifically for Wayne Combustion Model HS oil burners

it is standard trade practice to use a bead of high-temperature RTV silicone on the heat exchanger mating surface if a secondary gasket is not provided

McDonnell & Miller 51-2-HD Control 30067439-890 Durable Bronze Housing: Resists corrosionThe McDonnell & Miller 51 2 HD is a heavy duty head mechanism only (Part Number 135100) designed specifically for field replacement on Series 51 2 mechanical water feeders. This unit is engineered for low pressure steam and hot water boiler applications, supporting systems with a maximum vessel pressure of 35 PSI. As a specialized low water cut off (LWCO) component, it features a snap acting SPDT switch that provides simultaneous feed control and