Scully WL-170 1" Whistler Fill Signal for Oil Tank Overfill Prevention

The Scully WL-170 Whistler Fill Signal is a reliable and economical audible overfill alarm designed to retrofit into existing fuel oil storage tanks with 1-inch vent pipes. This essential safety device whistles continuously while the tank is being filled and stops when the tank reaches full capacity, alerting the delivery operator to prevent costly spills and tank ruptures.

Key Features:

• Fits 1-inch vent pipes for fuel oil storage tanks
• Audible whistle alert prevents overfills and tank damage
• Installs internally at the end of the vent pipe with special installation tool
• Calibrated whistle stem sized for 275-gallon vertical tanks
• Patented screen protector keeps whistle chamber free from pipe scale and debris
• Allows for product expansion to prevent pressure buildup
• Durable construction outlasts typical tank lifespan
• Compatible with both above-ground and below-ground tank installations

The Scully Whistler improves delivery efficiency by providing instant feedback during fuel deliveries, eliminating guesswork and reducing the risk of environmental contamination from overfills. Installation requires Scully Model WL-140 installation tool (sold separately). Ideal for residential, commercial, and industrial heating oil systems.