Maxitrol 325-7A-1 1/2 Regulator

As a veteran tech, I know you need reliability when stepping down from pounds to inches on high-capacity jobs. The Maxitrol 325-7A-1 1/2 is a professional-grade 1-1/2" NPT gas regulator built for commercial and industrial applications requiring up to 1,250,000 BTU/hr. Its lever-acting design provides superior dead-end lockup, ensuring a tight seal even when downstream appliances are not drawing fuel. Rated for a 10 PSI max inlet pressure and factory-equipped with a 4-12" w.c. outlet pressure spring, this unit handles natural gas, LP, and mixed gases with precision across the entire flow range—from full load down to pilot flow. The rugged aluminum housing stands up to the demands of the mechanical room while maintaining the precise pressure regulation necessary for modern high-efficiency burners and boilers. Whether you are piping a multi-appliance manifold or a massive single unit, this CSA-certified regulator provides the consistent delivery pressure your equipment demands to stay in tune.

• High-Capacity Throughput: Supports up to 1.25 million BTU, making it the go-to for large boilers and commercial water heaters.
• Positive Dead-End Lockup: The high-leverage valve linkage prevents downstream pressure creep during off-cycles.
• Multi-Appliance Versatility: Suitable for 2 PSI piping systems or 5 PSI internal residential/commercial distribution.
• Wide Fuel Compatibility: Fully operational with Natural Gas (NG) and Liquid Propane (LP) gas-air mixtures.
• Durable Construction: Heavy-duty aluminum body with a balanced valve design for stable gas pressure control.

What is the maximum inlet pressure for the 325-7A?
The Maxitrol 325-7A is rated for a 10 PSI maximum inlet pressure, though local codes often require a vent limiter for indoor installations over certain thresholds.

Does this regulator require a vent limiter for indoor use?
Yes, per ANSI Z21.18, if you are installing this indoors without piping a vent to the outside, a 12A49 vent limiter is typically required to ensure safety in the event of diaphragm failure.

Can I use this for pilot flow applications?
Absolutely. The lever-acting linkage is designed for precise regulating control even at the lowest flow rates, making it ideal for units with standing pilots.

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.