FS7-4 flow switches have a 1 1/4 NPT.

Series FS4-3 General Purpose Liquid Flow Switches are used for starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices, and others.

The System Sensor T-Tap Water Flow Detectors are WFDTH Retard T-Tap Water Flow Detectors designed for primary signaling in residential systems and fits within 2×4 stud wall construction.

WFDTN t-tap water flow detectors consist of a rugged, NEMA 4 rated enclosure that is more damage resistant than previous metal designs.

WFD Series water flow detectors are compatible with schedule 10 through 40 steel pipe, sizes 2 through 8 inch, and can be mounted in a vertical or horizontal position.

WFDNF water flow detectors are designed for primary signaling in systems that use CPVC fittings.