The B531 is designed for light to medium commercial applications where the added safety of twin sliding orifices and/or dual relief is desirable. The IM version can perform all of the functions of a conventional monitor set in a single device. Small diaphragm cases allow the B531 to respond quickly to fast on/off loads. Typical applications include schools, day care centers, nursing homes, and high-traffic areas such as drive-thru restaurants and car washes.

Outlet: 3/4", 1", 1-1/4", 1-1/2", & 2"