Maxitrol 325-5L48-3/4 Regulator

The Maxitrol 325-5L48-3/4 Regulator is a specialized line pressure gas regulator engineered for 5 PSI piping systems using natural or LP gas. As a veteran-grade lever acting gas regulator, it features an integrated Over-Pressure Protection Device (OPD) to ensure safety in high-demand residential, commercial, and industrial applications. Designed with 3/4" NPT threads, this unit manages a 320,000 BTU/hr max capacity, making it a reliable choice for feeding multiple downstream appliances from a high-pressure line. The factory-preset 7-11"wc outlet pressure range provides the precise control necessary for modern gas manifolds while achieving positive dead-end lock-up. This CSA certified gas regulator meets ANSI Z21.80/CSA 6.22 standards, specifically for reducing standard utility "pounds" pressure to "inches" water column. Its aluminum construction and vent limiter allow for multi-positional mounting, though horizontal upright installation is standard for optimal vent limiting performance. For contractors focusing on gas pressure regulation and safety, the 325-5L48 offers the high-leverage linkage needed for consistent delivery and pilot flow stability.

• Integrated OPD Safety: The factory-installed Over-Pressure Protection Device ensures the system remains safe during inlet pressure spikes up to 5 PSI.
• High Capacity Throughput: Rated for up to 320,000 BTU/hr, supporting high-output boilers, furnaces, and multi-appliance configurations.
• Precise Pressure Control: High-leverage linkage design provides excellent regulation from full flow down to pilot flow.
• Durable Construction: Rugged aluminum housing designed for longevity in professional HVACR installations.
• Pre-Assembled Convenience: Delivered as a factory-tested unit with the OPD attached, reducing field assembly time for technicians.

What is the purpose of the OPD on this Maxitrol regulator?
The Over-Pressure Protection Device (OPD) is a safety mechanism required for regulators used on piping systems with inlet pressures exceeding 2 PSI (up to 5 PSI) to protect downstream equipment in the event of a regulator failure.

Can the 325-5L48-3/4 be used for Propane (LP) gas?
Yes, it is suitable for Natural, LP, and Mixed gases. Note that for LP applications, the maximum inlet pressure is typically rated at 2 PSI, and the outlet spring may require adjustment to the 11" wc setting.

Does this model require a separate vent line?
When installed with the included 12A39 vent limiter, a dedicated vent line to the outdoors is generally not required for indoor installations, provided local codes allow for vent-limited devices in the specific mechanical space.

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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.