4″ Fuel Tank Relief Vent Cap

Description

Ensure reliable pressure relief and code compliance with our 4″ Emergency Relief Vent Cap, engineered to protect stationary fuel storage tanks from dangerous overpressure conditions. Designed for fuel system safety and long-term durability, this emergency vent cap automatically opens when internal tank pressure exceeds safe limits and securely resets once normal conditions return. It is an essential component for diesel fuel tanks, fire pump fuel systems, and other stationary storage applications where pressure control is critical.

This emergency relief vent cap features a female NPT connection, allowing for fast, straightforward installation on compatible fuel tank openings. Built from high-strength aluminum with a protective cast iron coating, it delivers excellent resistance to corrosion, weather exposure, and demanding industrial environments. The robust construction ensures dependable performance over time, even in high-use or outdoor installations.

Engineered for high-capacity airflow, this vent cap provides not less than 38,685 cubic feet per hour (CFH) at 2.5 PSI, allowing excess pressure to vent quickly and efficiently. This performance helps prevent tank damage, structural failure, and safety hazards caused by pressure buildup.

For added confidence, the 4″ emergency relief vent cap is UL certified and NFPA 30 compliant, meeting strict safety and regulatory standards for flammable and combustible liquid storage. These certifications make it a trusted solution for facilities that require code-compliant fuel tank protection, including fire protection systems, commercial facilities, and industrial sites.

Quick Shipping: To keep your project on schedule, this emergency relief vent cap typically ships within 1–2 business days, ensuring fast delivery and minimal downtime.

Choose our 4″ Emergency Relief Vent Cap for dependable fuel tank pressure protection, proven safety performance, and compliance you can trust.