Its primary function is to maintain stable refrigerant head pressure by modulating water flow

For optimal service life and to prevent sediment buildup in the pilot orifice

this component is critical for preventing pressure drops that lead to incomplete combustion and soot accumulation

With 1/8" NPT connections and a visible ON-OFF indicator

The Trane MOT17379 is a heavy-duty

Laars Heating Systems R0021901 Low Water Cut Out 320735-701 Its primary function is toThe Laars Heating Systems R0021901 Low Water Cut Out is a critical safety component designed for professional hydronic boiler maintenance and equipment protection. This LWCO safety device serves as the primary defense against dry fire conditions by monitoring real time fluid levels within the heat exchanger. When water levels drop below the required threshold, the low water cut out kit immediately interrupts the burner circuit, preventing catastrophic