Scully VS-521 Ventalarm Tank Fill Signal 2" x 1-1/4" NPT Whistle Alarm

The Scully VS-521 Ventalarm Signal (Part #00215) is a tank fill alarm device designed to prevent costly spills and ruptured tanks in above-ground and below-ground fuel oil storage applications. This audible indicator features a 2-inch male NPT tank opening connection and 1-1/4-inch female NPT vent pipe connection.

How It Works:

The Ventalarm Signal produces a loud whistle sound while the tank is filling. When the whistle stops, the tank has reached its safe capacity level, signaling the operator to stop pumping immediately. This simple but effective design has made Scully tank fill signals the industry standard for decades.

Key Features:

• 2-inch male NPT x 1-1/4-inch female NPT threaded connections
• Calibrated whistle stem allows for product expansion
• Whistle stem may be cut to accommodate flat-style tanks
• Patented screen keeps whistle chamber free from pipe scale and debris
• Durable construction for extended service life in demanding environments
• Suitable for petroleum, heating oil, and fuel storage applications
• Works with both above-ground and underground storage tanks

Applications:

Ideal for heating oil delivery systems, fuel storage facilities, industrial tanks, and any application where overfill protection is critical. Improves delivery efficiency by eliminating guesswork and preventing spills, overflows, and customer complaints.