The Model 1590 sprinkler gauge comes in three standard configurations. The R-1590 retarded air pressure gauge is used in a dry system on the sprinkler head side of a control valve. It accurately monitors line air pressure, but also has the ability to accept up to 250 psi of water pressure upon activation. The P-1590 sprinkler gauge is used on the water supply side of the system to indicate available source pressure. It can also be used alone on a wet system where water is constantly available to the sprinkler head.
One available configuration is an Air/Water version, in a 0-300 psi with both air and water noted on the dial. All 3½" gauges are approved by the Factory Mutual System and are listed by Underwriters’ Laboratories. All versions have the manufactured year noted on the dial face.
P-1590 - 0-300 psi
R-1590 - 0-80 psi, retarded to 250 psi
ACCURACY: ±3-2-3% (Grade B)
BOURDON TUBE: Phosphor bronze
WINDOW: Polycarbonate one-piece threaded
DIAL: Galvalume, with year of manufacture printed on dial
POINTER: Aluminum, painted black
CASE: Black plastic resin (PC-PBT corrosion résistant)
CONNECTION: Brass, 1/4"-18 NPT lower mount
APPROVALS: FM®and UL®; Factory Mutual System and listed by