this SPST (Single Pole Single Throw) switch provides the exact calibration required for high-duty cycle environments

it may stay open and prevent the furnace from firing

Key Benefits: Precise Actuation: Engineered specifically for the MK-2690 actuator to provide seamless operation with VB-7xxx globe valves

With a high flow capacity of 972

OEM Reliability: Direct manufacturer replacement (Part Number 510-300-013) designed specifically for spark ignition gas boilers

Hydrolevel EW201 Electro-Well this SPST (Single Pole SingleAs a seasoned technician, you know that a Hydrostat controller is only as good as its interface with the boiler water. The Hydrolevel EW201 Electro Well (Part Number 48 201) is the specialized 3 4" NPT immersion well required to unlock the Low Water Cut Off (LWCO) functionality on Fuel Smart Hydrostat models. Unlike standard brass wells that only transfer temperature, this Electro Well features a patented design with an integrated electrical insulator