Introducing the Fir-O-Matic B100HCV Check Valve, your go-to solution for preventing back-flow in fuel oil lines. Engineered with precision, this check valve features a 3/8 inch nominal size with 3/8 inch FNPT by 3/8 inch FNPT end connections, making it a perfect fit for your system. Crafted from robust forged brass, it promises unmatched durability, while the neoprene seat material ensures reliable performance even under demanding conditions. With a temperature rating of 165 degrees F, this valve is built to withstand high temperatures, ensuring safety and efficiency. The UL/ULC listed design further guarantees its reliability and compliance with safety standards. Proudly made in the USA, the Fir-O-Matic B100HCV Check Valve combines quality and performance, making it an essential component for any fuel oil line. Whether you're upgrading or maintaining your system, trust in the Fir-O-Matic brand for superior back-flow prevention.