Key Benefits for Technicians Dual Contact Logic: Integrated 1NO/1NC contacts allow for simultaneous status monitoring and circuit interlocking without extra relays

Veteran technicians recognize that utilizing the correct Armstrong replacement gasket is essential for preserving the integrity of the integrated valve station

By replacing a carbon-fouled or cracked ignitor with this genuine York component

allowing technicians to manually position valves or preload the spring during commissioning or emergency service

Installation is streamlined via the 1/4" flare nut with capillary connection

McDonnell & Miller 51-S-2 Switch 30067439-890 Key Benefits for Technicians DualThe McDonnell & Miller 51 S 2 is a heavy duty mechanical water feeder and low water cut off (LWCO) designed for low pressure steam and hot water boilers. Engineered for systems with a maximum vessel pressure of 35 psi, this unit features a snap acting SPDT switch that ensures positive electrical contact for burner control or alarm signaling. The 1" NPT connections allow for straightforward integration into existing boiler piping, providing a reliable