Model shall be WFDTN or WFDTNRN as manufactured by System Smart Card & Card Reader Sensor. T-Tap waterfl ow detectors shall be installed on a tee that has a 1in. NPT branch including: 1in., 1¼in., 1½in. and 2in. NPT threaded ferrous and brass tee; 1in., 1¼in., 1½in. and 2in. copper sweat tees; Tyco, Spears, NIBBCO brand 1in. CPVC tees as designed on the drawing and /or as specifi ed herein. Detectors shall mount on any clear pipe span of the appropriate nominal size, either a vertical upfl ow or horizontal run at least 6&LED Video Processor quot; from any fi ttings or valves that may change water direction, flow rate, or pipe diameter or no closer than 24in. from a valve orIndustrial Equipment & Components drain. Detectors shall have a sensitivity in the range of 4 to 10 gallons per minute and a static pressure rating of 375 psi. The WFDTN detector with incorporated time delay mechanism shall respond to waterfl ow iLinear Actuator n the specifi ed direction after a preset time delay that is fi eld adjustable. The delay mechanism shall be a sealed mechanical pneumatic unit with visual and audible indication of actuation. The aSpeaker,Trumpet & Buzzer ctuation mechanism shall include a ethylene vinyl acetate vane inserted through a hole in the pipe and connected by a mechanical linkage to the delay mechanism. Outputs shall consist of dual SPDT switches (Form C contacts). Two conduit entrances for standard fi ttings of commonly used electrical conduit shall be provided on the detectors. A grounding provision is provided. Unless noted, enclosures shall be NEMA 4 listed by Underwriters Laboratories Inc. All detectors shall be listed by Underwriters Laboratories Inc. for indoor or outdoor use.