Maxitrol 325-5-3/4 Regulator

The Maxitrol 325-5-3/4 Gas Regulator is a specialized pounds-to-inches gas regulator engineered for high-performance pressure reduction in 2-psi piping or elevated pressure systems. Built with a 3/4" NPT connection, this lever-acting gas regulator manages a maximum inlet pressure of 10 PSI while providing a versatile outlet pressure range of 4–12" W.C. With a 325,000 BTU/hr capacity, it is optimized for modern high-efficiency appliances, boilers, and industrial heaters. The high leverage valve linkage ensures a positive dead-end lock-up, maintaining stable downstream pressure even during zero-flow conditions. Suitable for both natural gas and propane (LP) applications, it provides precise gas pressure regulation from pilot flow up to full rated capacity. Note that if indoor installation is required, a 12A39 vent limiting device or 13A15-5 vent protector must be utilized to meet local mechanical codes. Professional installation by a licensed tech is mandatory to ensure proper field adjustment and system safety.

Technical Benefits:

• Precision Lock-Up: The lever-acting design ensures a tight seal at zero flow, preventing pressure creep in sensitive downstream components.
• Broad Compatibility: Certified for use with natural gas, manufactured, mixed, liquefied petroleum, and LP gas-air mixtures.
• High Capacity Flow: Rated for 325,000 BTU/hr, making it a reliable solution for high-demand residential and light commercial equipment.
• Durability: Rugged construction and high-grade internal components are designed for long-term service in demanding mechanical rooms.

Common Questions:

Does the Maxitrol 325-5 require a vent line?
When installed indoors, a vent line to the outdoors is typically required unless a certified Maxitrol 12A39 vent limiter is installed. Local codes always dictate final venting requirements.

Can I use the 325-5-3/4 for Propane (LP) systems?
Yes, this regulator is multi-gas compatible. However, pressure settings must be field-verified using a manometer to ensure the 4–12" W.C. spring is correctly tensioned for LP outlet pressure requirements.

What is the difference between this and a standard service regulator?
The Maxitrol 325 Series is specifically designed for pounds-to-inches intermediate regulation (e.g., dropping 2 PSI or 5 PSI line pressure down to inches of water column) rather than high-pressure tank-to-house service.

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.