Mcdonnel And Miller FS4-3 Flow Switch

Price: $225.00 per pcs

Availability: Contact for availability — call (347) 262-9561 for lead time

Description

A McDonnell & Miller FS4-3 flow switch. It proves that water is actually moving before allowing the heat source to fire, which protects equipment that must never run dry — a boiler, a heat exchanger, or an electric heater. A pump can be running and drawing current while delivering nothing, if it is airlocked or a valve is shut, so a flow switch verifies the result rather than the intention.