The Maxitrol 325-5L-3/4 line pressure regulator for accurate gas control 3/4″, Z21.80 certified with an LP stamp for propane applications. It provides a consistent outlet pressure for safe and efficient gas flow at inlet pressures up to 2 PSI. It is commonly used in residential and commercial HVAC systems, including furnaces, boilers and water heaters to keep them operating better and prevent over-pressurization. Advantages include increased safety, better fuel economy, and reliable operation of HVAC equipment. Its compact rugged construction makes it easy to install and maintain which makes it a perfect fit for gas-fired heating systems.