Introduction
This manual provides detailed instructions for the safe installation, operation, and maintenance of the Maxitrol 325-3L-1/2 Line Regulator. This device is designed to regulate gas pressure in various applications. Please read this manual thoroughly before installation or use to ensure proper function and safety.
Safety Information
WARNING: Installation and service must be performed by a qualified installer, service agency, or gas supplier. Failure to follow these instructions could result in fire or explosion, causing property damage, personal injury, or death.
- Always shut off gas supply before installing or servicing the regulator.
- Ensure proper ventilation during installation and operation.
- Check for gas leaks after installation using a non-corrosive leak detection solution.
- Do not use this regulator for purposes other than its intended design.
Product Overview
The Maxitrol 325-3L-1/2 is a 1/2-inch line regulator constructed from aluminum, designed to manage inlet pressures up to 2 psi. It is suitable for horizontal upright mounting and is certified for reliable gas pressure regulation.

Image: A Maxitrol 325-3L-1/2 line regulator, made of aluminum, featuring a cylindrical yellow cap with a blue top indicating "CERTIFIED LINE PRESSURE REGULATOR Z21.80/CSAG" and a hexagonal brass adjustment screw. The regulator has a threaded inlet/outlet for 1/2-inch pipes.
Specifications
| Property | Value |
|---|---|
| Pipe Size | 1/2 inch |
| Maximum Inlet Pressure | 2 psi |
| Mounting Orientation | Horizontal Upright |
| Construction Material | Aluminum |
| Model Number | 325-3L-1/2 |
| Product Dimensions | 6.46 x 5.16 x 3.62 inches |
| Product Weight | 12.32 ounces |
| Country of Origin | United States |
| Manufacturer | Maxitrol Company |
Setup and Installation
- Ensure the gas supply is turned off at the main valve before beginning installation.
- Identify the correct gas flow direction. The regulator typically has an arrow cast into its body indicating the intended gas flow.
- Install the regulator in a horizontal upright position, as specified for this model, ensuring it is level and securely supported.
- Apply appropriate pipe sealant (suitable for gas applications) to all threaded connections.
- Tighten connections securely, but do not overtighten, which could damage the threads or the regulator body.
- After installation, slowly turn on the gas supply and check all connections for leaks using a suitable non-corrosive leak detection solution. The appearance of bubbles indicates a leak.
- If leaks are detected, immediately turn off the gas supply, re-tighten connections, and re-test. Do not operate the system if any leaks are present.
Operating Instructions
The Maxitrol 325-3L-1/2 regulator is designed to automatically maintain a consistent outlet pressure based on its factory setting or field adjustment. It requires no manual operation during normal use.
- Once properly installed and leak-tested, the regulator will automatically reduce the incoming gas pressure to the desired outlet pressure for your appliance.
- For specific outlet pressure adjustments, it is recommended to consult a qualified technician. Adjustments typically involve turning the adjustment screw located on the top of the regulator, often requiring a pressure gauge for accurate setting.
- Periodically monitor system performance to ensure stable gas flow to connected appliances.
Maintenance
The Maxitrol 325-3L-1/2 regulator is designed for long-term, reliable operation with minimal maintenance. However, regular inspection is recommended.
- Periodically inspect the regulator and surrounding piping for any visible signs of damage, corrosion, or gas leaks.
- Ensure the area around the regulator is kept clear of obstructions, debris, or anything that could impede its function or ventilation.
- Do not attempt to disassemble, modify, or repair the regulator yourself. Internal components are not user-serviceable and tampering can compromise safety and performance.
- If the regulator is suspected to be malfunctioning, or if you observe any unusual operation, contact a qualified service technician for inspection and replacement if necessary.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Gas Flow | Main gas supply off; Regulator clogged or failed; Incorrect installation. | Check if the main gas valve is open; Contact a qualified technician for inspection; Verify installation steps and flow direction. |
| Low Gas Pressure | Insufficient inlet pressure; Regulator malfunction; Obstruction in gas line. | Verify the incoming gas pressure; Contact a qualified technician; Inspect piping for blockages. |
| Gas Leak Detected | Loose connections; Damaged regulator or seals. | Immediately turn off gas, re-tighten connections, and re-test; If damage is apparent, replace the regulator. |
| Fluctuating Pressure | Inlet pressure instability; Regulator internal issue. | Consult your gas supplier regarding inlet pressure; Contact a qualified technician for regulator assessment. |
Warranty and Support
For detailed warranty information or technical support regarding your Maxitrol 325-3L-1/2 Line Regulator, please contact Maxitrol Company directly or refer to their official website. It is advisable to keep your purchase receipt as proof of purchase for any warranty claims.
Manufacturer: Maxitrol Company
Website: www.maxitrol.com





