Scully VS-202 Ventalarm Tank Fill Signal 1-1/2" NPT

The Scully VS-202 Ventalarm Signal is a tank fill audible alarm designed for above and below ground oil storage tanks to prevent costly spills and ruptured tanks by alerting when the tank reaches safe capacity. This whistle-stop alarm whistles while the tank is being filled and stops when the tank is full.

Key Features:

• 1-1/2 inch male NPT tank opening connection and 1-1/2 inch female NPT vent pipe connection
• Calibrated whistle stem allows for product expansion and may be cut for flat style tanks
• Patented screen keeps whistle chamber free from pipe scale and bugs
• Suitable for use on both above ground and below ground oil tanks
• Made in USA

When oil level nears the top of the tank, oil covers the opening at the bottom of the vent-alarm drop-tube, causing the whistling noise to stop when oil is a few inches from the very top, signaling the delivery driver to stop pumping. This simple yet effective audible warning system has been protecting oil tank installations since 1936, providing reliable overfill prevention without the need for electronic components.