The Preferred Fil-A-Larm system is installed in conjunction with underground storage tanks and above ground main storage tanks. 

It is designed to be located near the tank fill terminal to notify of a potential overfill condition.  It triggers a high level alarm that alerts the filling operator that the tank is filled to its predetermined capacity.  When an overfill alarm occurs, the alarm bell sounds and the corresponding alarm light flashes. The bell is automatically silenced in 90 seconds or instantly silenced when the operator selects the “Alarm Silence” pushbutton.  The visual alarm is highly visible even in direct sunlight.  The enclosure top mounted flashing lamp is visible from 180°.  A “Test” pushbutton is provided to verify the operation of the flashing alarm light(s) and bell.  The alarm automatically resets when liquid level goes below the overfill alarm setpoint.  A digital display of tank volume is available. 

• Prevents Overfilling Of Fuel Oil Storage Tanks
• Includes 4" Weatherproof Bell 
• Moisture Proof Carbon Steel Enclosure

Enclosure: 12" W x 12" H x 6" D, NEMA 4 Construction

Audible Alarm: 4" 92 db bell

Visual Alarm: Lens 3 ¼" H, 4 ⅜" Dia. With 40 Watt Bulb

Alarm Silence Button: Silences Bell (Auto Time-Out Also)

Alarm Test: Verifies Flashing Alarm Light(s) And Bell

Construction: The Model Fil-A-Larm system is surface mounted, NEMA 4 rated moisture proof enclosure.  The box material is carbon steel.  The interior is prime coated and painted with a durable white enamel

Provide and install where shown on the drawings an Audible/Visual Overfill Alarm Station for (1, 2, or 3) tanks to be activated by Preferred Instruments HLS High Level Switch, TG-EL-D3 or TG-EL-D5 Tank Gauges.  The system shall consist of a Preferred FA-S Caution Sign and NEMA 4 Weatherproof  Cabinet to include a 4" weatherproof bell with automatic silencing, 180° visible flashing lamp, bell silencing pushbutton, and Alarm Test Pushbutton.  Overfill Alarm Station shall be a Preferred Utilities Mfg. Corp., Danbury, CT, Model FA-AV.  To add gallons display to FA-AV add: “to include a digital display of tank content, reading directly in gallons without multiplier.”