FIREGUARD 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. Fireguard detectors consist of a rugged, NEMA 3-rated enclosure. Designed for both indoor and outdoor use, Fireguard detectors operate across a wide temperature range, from 32 to 155 °F. UL-listed models are equipped with tamper-resistant cover screws to prevent unauthorized entry. Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a durable terminal block to assure reliable performance. The Fireguard detectors incorporate a mechanical retard feature, which minimizes the risk of false alarm due to pressure surges or air trapped in the sprinkler system. In addition, the mechanical retard’s unique sealed design is immune to dust and other contaminants. The Fireguard detectors are designed to simplify installation. Two conduit openings permit easy attachment to the local alarm system. The retard mechanism and dual SPDT switches are field-replaceable.

The VTWS waterflow detector shall be used in wet pipe fire sprinkler systems only. It shall not be used as sole initiating device in both deluge and preaction systems. Any misuse in either deluge system or preaction systems may result in an unintended discharge caused by a surge, trapped air or a short retard time. Do not use the detector on copper pipe. The clamping forces of the mounting bolts may make the copper pipe deformation and prevent the detector from proper function. Do not install steel or iron pipe sections in copper piping for mounting a waterflow detector. Incompatibility between the dissimilar metals will cause bi-metallic corrosion. Be sure the direction of flow arrow and directional cover point in the correct direction or else water flow will go unreported. See FIGURE 3 and FIGURE 6 in the installation manual.