Maxitrol 325-9-2-12A49 Regulator

The Maxitrol 325-9-2-12A49 is a heavy-duty, 2-inch NPT line pressure gas regulator engineered for high-capacity residential, commercial, and industrial piping systems. Featuring a lever-acting design, this unit provides superior control for natural gas and LP (propane) applications, supporting a maximum inlet pressure of 5 PSI for NG and 2 PSI for LP. With a high-leverage valve linkage, it ensures positive dead-end lock-up, making it ideal for large equipment loads up to 2,250,000 BTU/hr. The integrated 12A49 vent limiter eliminates the need for expensive external vent piping in indoor installations by safely restricting gas escapement in the event of a diaphragm failure. Certified to ANSI Z21.80/CSA 6.22 standards, this regulator maintains a precise 4-12" wc outlet pressure range, delivering stable performance from full flow down to pilot flow. Its rugged aluminum housing and multi-positional mounting capabilities provide veteran technicians with the flexibility needed for complex manifold or appliance-specific configurations.

• High-Capacity Throughput: Handles total appliance loads up to 2,250,000 BTU/hr, perfect for large-scale boiler and furnace headers.
• Integrated Safety: Factory-installed 12A49 vent limiter ensures compliance with indoor safety codes without additional copper vent lines.
• Dead-End Lock-Up: Features a high-leverage linkage for a tight seal during zero-flow conditions, protecting downstream components.
• Fuel Versatility: Fully compatible with natural gas, liquid petroleum (LP), and manufactured gas mixtures.
• Precision Control: Maintains steady 4-12" wc outlet pressure even under fluctuating inlet conditions or low-pilot demands.

Can the Maxitrol 325-9 be installed outdoors?
While the regulator itself is robust, the 12A49 vent limiter is specifically designed for indoor use. For outdoor applications, the vent limiter must be replaced with a dedicated vent protector to prevent moisture and debris from entering the breather hole.

Does this regulator require a separate overpressure protection device (OPD)?
According to ANSI Z21.80 standards, a line pressure regulator must have an OPD if the supply pressure exceeds 2 PSI. This model is rated for 5 PSI (NG), but ensure your specific jurisdictional codes do not require an external secondary safety device for your local utility pressure.

Is mounting orientation critical for this model?
When utilizing the 12A49 vent limiter, the regulator should be mounted in an upright, horizontal position to ensure the ball-check mechanism functions correctly. Vertical mounting is not recommended with a vent limiter installed.

This item is not eligible for free shipping.

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.