When managing a commercial plumbing system, ensuring consistent water pressure is crucial. Too much pressure can damage pipes and equipment, while too little pressure can affect performance. That's where a commercial pressure reducing valve (PRV) comes in. In this guide, we'll walk you through everything you need to know about choosing and installing a PRV to keep your system running smoothly.

What is a Commercial Pressure Reducing Valve?

Understanding the Basics

A commercial pressure reducing valve is a device that automatically reduces high incoming water pressure to a safer and more manageable level. It's commonly used in commercial buildings where the water pressure from the main supply can be too high for the plumbing system to handle effectively.

How Does It Work?

The valve is typically installed at the main water supply line. It uses an internal diaphragm or piston to control the flow of water and reduce the pressure. When water enters the valve, it pushes against the diaphragm, which then adjusts to allow only a certain amount of water through, thereby reducing the pressure.


 

Why Do You Need a Pressure Reducing Valve?

Protecting Your Plumbing System

Excessive water pressure can cause pipes to burst, fixtures to wear out faster, and can even lead to leaks and flooding. By installing a commercial pressure reducing valve, you protect your plumbing system from these potential damages.

Energy and Water Efficiency

Reducing water pressure can lead to significant energy and water savings. High pressure often leads to more water being used unnecessarily, which not only increases utility bills but also wastes a valuable resource. With a PRV, you can control and minimize water usage, making your system more efficient.

Maintaining Consistent Water Flow

In commercial settings, maintaining consistent water flow is essential for operations. A commercial pressure reducing valve ensures that the water pressure remains steady, which is especially important for buildings with multiple floors or extensive plumbing networks.

How to Choose the Right Pressure Reducing Valve

Consider Your Water Pressure Requirements

Before selecting a PRV, it’s important to know the current water pressure in your building and what the ideal pressure should be. Most commercial buildings aim for water pressure between 50 to 70 PSI (pounds per square inch), but this can vary depending on the specific needs of your system.

Material and Durability

Commercial PRVs are typically made from durable materials like brass or stainless steel to withstand high pressure and last longer. When choosing a valve, consider the material based on the type of water in your system—whether it's potable, non-potable, or involves corrosive substances.

Size and Compatibility

Ensure that the PRV you choose is compatible with the size of your pipes and the overall design of your plumbing system. Most commercial valves come in standard sizes, but it’s crucial to match the valve size to your existing pipes to avoid installation issues.

Adjustable vs. Pre-Set Valves

Some PRVs allow for adjustable pressure settings, while others come with pre-set pressure levels. Adjustable valves offer more flexibility, allowing you to fine-tune the pressure based on your needs. However, pre-set valves can be more convenient if your pressure requirements are straightforward and consistent.

Step-by-Step Guide to Installing a Commercial Pressure Reducing Valve

1. Gather Your Tools and Materials

Before you begin, ensure you have all the necessary tools and materials. You'll typically need:

• Wrench set
• Pipe cutter
• Teflon tape
• Screwdriver
• The chosen PRV
• Safety gear (gloves, goggles)

2. Shut Off the Water Supply

Safety first! Before starting the installation, shut off the main water supply to the building. Open a faucet at the lowest point in the building to drain any remaining water from the pipes.

3. Locate the Installation Point

The PRV should be installed after the main shutoff valve but before any branch lines. This position ensures that all water entering the building passes through the valve.

4. Cut the Pipe

Using a pipe cutter, carefully cut the section of pipe where the valve will be installed. Ensure the cut is clean and straight for a proper fit.

5. Install the Pressure Reducing Valve

Wrap Teflon tape around the threaded ends of the PRV to ensure a tight seal and prevent leaks. Then, attach the valve to the cut section of the pipe, making sure it's aligned correctly with the flow direction marked on the valve. Tighten the connections using a wrench.

6. Adjust the Valve Settings

If you’re using an adjustable PRV, set the desired pressure level by turning the adjustment screw. Refer to the manufacturer's instructions for specific details on how to adjust the pressure correctly.

7. Turn the Water Supply Back On

Once the valve is securely installed and adjusted, slowly turn the water supply back on. Check for leaks and ensure that the pressure is at the desired level by testing it with a pressure gauge.

8. Final Inspection

After the installation is complete, conduct a final inspection. Ensure there are no leaks, and that the water pressure throughout the building is consistent with your settings. Make any necessary adjustments and recheck.

Maintenance Tips for Your Pressure Reducing Valve

Regular Inspections

To ensure your PRV continues to function properly, conduct regular inspections. Look for signs of wear, leaks, or reduced performance. Early detection of issues can prevent costly repairs and downtime.

Cleaning and Replacing Parts

Over time, debris can accumulate in the valve, affecting its performance. Periodically, clean the valve or replace internal parts as needed. Follow the manufacturer's guidelines for maintenance intervals.

Professional Servicing

While PRVs are relatively low-maintenance, scheduling professional servicing every few years can extend the life of your valve and ensure it operates efficiently.

Conclusion

A commercial pressure reducing valve is a vital component in maintaining the safety, efficiency, and longevity of your plumbing system. By understanding how to choose the right valve and installing it correctly, you can protect your system from damage, reduce water and energy consumption, and ensure consistent water pressure throughout your building.

Whether you're installing a new system or upgrading an existing one, following these steps will help you achieve optimal results. And remember, regular maintenance is key to keeping your PRV and your entire plumbing system in top shape.