Product Overview
The Watts LF25AUB-Z3 Series 2-inch Lead-Free Water Pressure Reducing Valve is engineered to regulate incoming water pressure, safeguarding plumbing systems and promoting water conservation in commercial, industrial, and residential settings. This valve features a robust lead-free cast copper silicon alloy body, a replaceable seat module, and a bypass mechanism for thermal expansion pressure control.
Key features include:
- Lead-Free Construction: Made from lead-free copper silicon alloy, ensuring safe water delivery.
- Pressure Reduction: Effectively lowers incoming water pressure to a safe, adjustable range.
- Thermal Expansion Bypass: Manages pressure increases due to thermal expansion, preventing system damage.
- Adjustable Pressure: Factory set at 50 psi (345 kPa), with an adjustable range of 25 to 75 psi (172 to 517 kPa).
- Durable Components: Includes a removable integral stainless steel strainer, corrosion-resistant screws, a high-temperature diaphragm, and a replaceable seat module for extended service life.
- Versatile Connections: Compatible with various end connection options for simplified installation.
Figure 1: Watts LF25AUB-Z3 Lead-Free Water Pressure Reducing Valve, front view.
Safety Information
- Always shut off the main water supply before installation or maintenance.
- Depressurize the system before working on the valve.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Ensure all connections are properly sealed to prevent leaks.
- Consult a qualified plumber if you are unsure about any installation or maintenance procedures.
- This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm (Proposition 65 warning).
Setup and Installation
The LF25AUB-Z3 valve is designed for straightforward installation. Follow these general guidelines:
- Prepare the Installation Area: Ensure sufficient space for the valve and access for future maintenance.
- Shut Off Water Supply: Locate and close the main water shut-off valve to your property.
- Depressurize System: Open a faucet at the lowest point in your plumbing system to drain water and relieve pressure.
- Identify Flow Direction: The valve body has an arrow indicating the direction of water flow. Install the valve so that the arrow points in the direction of water flow from the main supply into your property.
- Connect the Valve: The valve features NPT female union inlet and NPT female outlet connections. Use appropriate fittings (PEX, CPVC, Quick-Connect, or NPT threaded) and sealing compounds (e.g., PTFE tape or pipe dope) to ensure watertight connections.
- Tighten Connections: Securely tighten all connections, but avoid over-tightening, which can damage threads or fittings.
- Restore Water Supply: Slowly open the main water shut-off valve.
- Check for Leaks: Inspect all connections for any signs of leaks. Tighten as necessary.
- Verify Pressure Setting: Use a pressure gauge to confirm the outlet pressure. The valve is factory set to 50 psi.
Figure 2: Watts LF25AUB-Z3 Lead-Free Water Pressure Reducing Valve, showing union connection.
Video 1: Watts Pressure Reducing Valve Overview. This video provides a visual overview of the Watts pressure reducing valve, demonstrating its function and typical installation context within a household plumbing system.
Operating Instructions
The Watts LF25AUB-Z3 valve is designed for automatic operation once installed and adjusted. The primary operational aspect is pressure adjustment.
- Initial Setting: The valve is factory preset to 50 psi (345 kPa).
- Adjusting Outlet Pressure:
- To increase the outlet pressure, turn the adjustment screw (located at the top of the bell housing) clockwise.
- To decrease the outlet pressure, turn the adjustment screw counter-clockwise.
- Pressure Range: The adjustable pressure range is 25 to 75 psi (172 to 517 kPa). Do not adjust outside this range.
- Monitoring: It is recommended to use a pressure gauge downstream of the valve to accurately monitor and set the desired outlet pressure.
- Thermal Expansion: The built-in bypass feature allows for reverse flow when outlet pressure exceeds inlet pressure by approximately 10 psi due to thermal expansion, protecting the system.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Watts LF25AUB-Z3 valve. The design allows for easy in-line serviceability.
- Strainer Cleaning: The valve includes a removable integral stainless steel strainer. Periodically inspect and clean the strainer to prevent debris buildup, which can affect performance.
- Seat Module Replacement: The valve features a replaceable seat module. If the valve fails to hold pressure or exhibits consistent leaks, the seat module may need replacement. Consult the Watts website or a qualified plumber for replacement parts and procedures.
- Diaphragm Inspection: The high-temperature diaphragm is a critical component. If pressure regulation becomes erratic, inspect the diaphragm for wear or damage.
- General Inspection: Annually inspect the valve for any external damage, corrosion, or leaks.
Video 2: Watts Pressure Reducing Valve Preview. This short video demonstrates the removal and inspection of the internal strainer, a key maintenance step for the Watts pressure reducing valve.
Troubleshooting
This section provides general guidance for common issues. For complex problems, consult a qualified plumbing professional.
| Problem | Possible Cause | Solution |
|---|---|---|
| High water pressure downstream | Valve not regulating, debris in valve, incorrect adjustment. | Adjust pressure screw counter-clockwise. Inspect and clean strainer. Check for damaged seat module or diaphragm. |
| Low water pressure downstream | Valve set too low, debris in valve, insufficient inlet pressure. | Adjust pressure screw clockwise. Inspect and clean strainer. Verify main water supply pressure. |
| Water dripping from relief port | Thermal expansion, debris in bypass, worn seat. | This can be normal due to thermal expansion. If excessive, check for debris in the bypass or a worn seat module. Consider installing an expansion tank if not already present. |
| Visible leaks from valve body | Loose connections, damaged seals/gaskets, cracked housing. | Tighten connections. Inspect and replace seals/gaskets. If housing is cracked, replace the valve. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | LF25AUB-Z3 |
| Size | 2 Inch |
| Material | Lead-Free Cast Copper Silicon Alloy |
| Inlet Connection Type | NPT Female Union |
| Outlet Connection Type | NPT Female Outlet |
| Adjustable Pressure Range | 25 to 75 psi (172 to 517 kPa) |
| Factory Set Pressure | 50 psi (345 kPa) |
| Maximum Operating Pressure | 300 psi (20.7 bar) |
| Temperature Range | 33°F to 180°F (0.5°C to 82°C) |
| Exterior Finish | Stainless Steel (SS Seat) |
| Item Weight | 12.7 pounds |
| Product Dimensions (L x W x H) | 6 x 6 x 4 inches |
| Certifications | IAPMO |
Warranty and Support
Watts products are manufactured to high standards of quality and reliability. For specific warranty information, technical support, or to locate authorized service providers, please refer to the official Watts website or contact their customer service department.
Watts Water Technologies is committed to providing innovative solutions for water management. More information can be found on their official website: www.watts.com
