Maxitrol 12A49 Vent Limiter

The Maxitrol 12A49 Vent Limiter is a critical safety component designed for indoor gas regulator installations. This 1/2" NPT brass automatic vent limiting device is engineered specifically for use with Maxitrol 325-7A, 325-7AL, 325-9, and 325-9L series regulators, as well as the OPD210E. By installing the 12A49 directly into the vent connection, technicians can eliminate the labor-intensive requirement of running vent piping to the outdoors. In the event of a diaphragm rupture, the internal ball check mechanism significantly restricts gas escapement to within ANSI Z21.80/CSA 6.22 standard requirements, ensuring the mechanical room remains safe. This 1/2" NPT vent limiter must be mounted in an upright position to maintain its certified performance. Its heavy-duty brass construction provides the durability required for high-capacity 2 PSI and 5 PSI piping systems. For HVAC contractors and gas fitters, utilizing the 12A49 is a standard practice for simplifying code compliance in residential and commercial mechanical systems.

• Code Compliance: Meets ANSI Z21.80/CSA 6.22 standards for vent limiting means in indoor applications.
• Labor Savings: Eliminates the need for costly and time-consuming external vent lines.
• Precision Engineering: Features an automatic ball check that permits unobstructed diaphragm response during normal operation.
• Broad Compatibility: Matches specifically with high-capacity 325-7 and 325-9 series Maxitrol regulators.
• Durable Material: Constructed from high-quality brass to withstand industrial environments.

• Can I use the 12A49 vent limiter for outdoor installations? No, vent limiters are designed for indoor use only. For outdoor protection against rain, insects, or debris, a vent protector like the 13A32-50 should be used instead.
• What is the correct mounting orientation for the 12A49? To ensure the internal ball check functions correctly, the regulator and vent limiter must be installed in the upright, vertical position.
• Does this part work with all 325 series regulators? The 12A49 is specifically sized for the 1/2" NPT vent ports found on the 325-7 and 325-9 series. Smaller regulators like the 325-3 or 325-5 require different model numbers.

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.