Maxitrol 325-5-1-12A39 Regulator

The Maxitrol 325-5-1-12A39 is a field-proven lever-acting gas regulator designed for high-precision pressure management in residential, commercial, and industrial piping systems. This 1-inch NPT model is engineered to handle a 5 PSI maximum inlet pressure for natural gas and 2 PSI for LP, making it an essential component for high-pressure service lines. Featuring a factory-installed 12A39 vent limiter, this unit eliminates the need for vent piping to the outdoors when installed in accordance with local codes. The integrated positive dead-end lock-up ensures that downstream pressure remains stable even under static conditions, preventing pressure creep and protecting sensitive appliance valves.

With a 325,000 BTU/hr maximum capacity, this regulator provides excellent control from full flow down to pilot stages. The 4-12 inch w.c. outlet pressure range offers the flexibility required for various appliance manifolds. Built with a rugged aluminum housing and an ANSI Z21.18/CSA 6.3 certification, the 325-5-1-12A39 is the industry standard for reliable pounds-to-inches gas regulation.

• Positive Dead-End Lock-Up: High-leverage valve linkage provides a tight seal to prevent downstream pressure equalization during shutdown.
• Internal Safety: Factory-included 12A39 vent limiter ensures safe operation in indoor environments without external vent lines.
• Multi-Appliance Capacity: High flow rating of 325,000 BTU/hr supports multiple downstream appliances or large single units.
• Precise Modulation: Lever-acting design allows for consistent regulation across the entire flow spectrum, from low-fire pilots to high-fire demand.

Can this regulator be mounted in any orientation?
When equipped with a vent limiter, the regulator must be installed in an upright horizontal position to ensure the limiting device functions correctly.

Is this suitable for outdoor use?
While the 325 series is robust, regulators with vent limiters are primarily intended for indoor applications. For outdoor installations, a vent protector should be used to prevent moisture and debris from entering the vent port.

What is the difference between an appliance regulator and a line regulator?
The Maxitrol 325 series is dual-certified. As an appliance regulator, it manages pressure directly at the equipment, while its construction also allows it to serve as a line regulator for 2-5 PSI piping systems common in modern construction.

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.