Armstrong Fluid Technology 216945 300 Valve Refrigerant 15 inch water column switch 15 inch water column switch is calibrated to strict tolerances to prevent nuisance tripping while providing reliable lockout protection against dangerous back drafting conditions adjustable timer to control discharge intervals and duration Simplified Maintenance: The 1 2" union outlet allows for easy disconnection without cutting pipework This specific model is designed for use in closed loop hydronic heating and HVAC systems and should be used according to local plumbing codes regarding backflow prevention and potable water safety
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Armstrong Fluid Technology 216945-300 Valve Refrigerant 15 inch water column switch