Scully VS-275 Compression Vent Alarm Signal 2" X 2" 00213

The Scully VS-275 Compression Vent Alarm Signal is an audible venting unit that produces a whistle sound during tank filling to indicate internal air displacement and filling progress. It operates through a compression-based airflow path where escaping air passes through a calibrated whistle chamber, generating a sound signal that stops when the tank reaches its fill level. The 2" x 2" connection size supports compatibility with matching vent and tank openings, ensuring proper sealing and HVAC system passage. By providing a clear audible indication during filling, it improves fill accuracy, prevents overflow conditions, and provides proper handling of stored liquids.