The Taco Industrial Flow Switch (IFS) starts or stops electronically operated equipment when a flow or no flow condition occurs.The IFS can be used in 1 in to 8 in liquid flow lines, carrying water or any nonhazardous fluid not harmful to brass, stainless steel or EPDM. It is used in a wide variety of applications including heating systems, domestic water boosters, process work, water systems, chillers and on low mass boilers.