Scully 00274 VS-523 Ventalarm Tank Fill Signal 2 Inch 21-3/4 Inch

The Scully VS-523 Ventalarm is the original tank fill alarm for spill-free deliveries, manufactured since 1936. This model features a 2-inch tank opening and 2-inch vent pipe connection, with a 21-3/4 inch length designed specifically for tanks greater than 2,000 gallons.

The Ventalarm works by producing an audible whistle signal during tank filling that stops when the tank has been filled to its safe capacity level, preventing costly spills and ruptured tanks. The device includes a calibrated whistle stem that allows for product expansion, and the whistle stem may be cut for flat-style tanks.

Key Features:

• Suitable for above and below ground oil storage tanks
• Improves delivery efficiency and prevents tank overfills
• Patented screen keeps whistle chamber free from pipe scale and bugs
• One-time installation usually outlasts the life of the tank
• Made in USA with durable construction
• 2-inch male x 2-inch female NPT connections

This Ventalarm tank fill signal provides reliable overfill protection for residential and commercial oil heating systems, ensuring safe fuel deliveries and eliminating spills and customer complaints.