Maxitrol 325-5L48-1/2-LIM Regulator

Professionals in the field recognize the Maxitrol 325-5L48-1/2-LIM as a vital component for high-pressure gas distribution systems. This 1/2" NPT line pressure regulator is specifically engineered to bridge the gap between elevated supply pressures and standard appliance operating requirements. Built with a robust lever-acting design, it manages a maximum inlet pressure of 5 PSI for natural gas and up to 2 PSI for liquid propane. The integrated over-pressure device (OPD) provides essential safety by limiting downstream pressure to 2 PSI in the event of a regulator failure, while the factory-installed vent limiters enable indoor installation without the need for additional piping to the outdoors. With a max capacity of 235,000 BTU/hr and a 7-11" w.c. outlet pressure range, this unit ensures stable, positive dead-end lockup and precise control for residential and light commercial equipment including furnaces, water heaters, and boilers.

• Enhanced Safety: Includes a factory-assembled over-pressure protection device (OPD) that meets ANSI Z21.80/CSA 6.22 compliance for 5 PSI systems.
• Simplified Installation: Integrated vent limiters eliminate the labor and material costs of running vent lines to the atmosphere under specific code conditions.
• Precise Pressure Control: Delivers a consistent 7-11 inch water column output, critical for modern high-efficiency HVAC equipment and burner manifolds.
• Versatile Fuel Compatibility: Fully suitable for natural gas, LP gas, and mixed gas-air systems within specified pressure limits.
• Rugged Construction: Compact aluminum housing designed for durability in indoor and horizontal configurations.

Can I install this regulator outdoors or in a vertical position?
While the 325 series is technically multi-positional, specific models equipped with vent limiters must be installed in an upright/horizontal position only to ensure the limiting device functions correctly according to manufacturer specifications.

What is the difference between a standard 325-5 and the 5L48 model?
The "L48" designation indicates the inclusion of the OPD 48 over-pressure device, which is required by code for any line pressure regulator operating above 2 PSI to prevent dangerous over-pressurization of the downstream piping.

Does this regulator require an external vent line?
No, since this model includes vent limiters, it is typically permitted for indoor use without external venting, provided it is installed in a well-ventilated area per local mechanical codes.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.