When it comes to maintaining a well-functioning plumbing system, occasionally, replacements and upgrades are necessary. If you find yourself in need of replacing a Zurn Wilkins XL600 (1.5″) pressure reducing valve, you’ve come to the right place.

In this blog, we will provide you with a comprehensive step-by-step guide on how to successfully replace a Zurn Wilkins XL600 (1.5″) valve. From preparation to installation, we will cover the key aspects to ensure a smooth and efficient process.

Gather the Necessary Tools and Materials

Before starting the replacement process, it’s essential to gather all the required tools and materials. This may include a pipe wrench, adjustable wrench, Teflon tape, pipe cutter, soldering equipment (if applicable), replacement valve, and any additional fittings or connectors needed for the specific installation.

Shut Off the Water Supply

The first step in any plumbing project is to turn off the water supply. Locate the main water valve and shut it off to prevent any water flow during the replacement process. It’s crucial to verify that the water supply is completely shut off before proceeding.

Drain the System

To avoid any water leakage during the replacement, it’s necessary to drain the system. Open all faucets and drain valves in the vicinity to release any remaining water in the pipes. Ensure that the system is fully drained before proceeding with the valve replacement.

Remove the Old Valve

Using a pipe wrench or adjustable wrench, disconnect the fittings and pipes connected to the old Zurn Wilkins XL600 valve. Carefully remove the valve from its mounting location. Take note of the configuration and placement of the fittings for reference during the installation of the new valve.

Prepare the New Valve

Before installing the new valve, inspect it for any defects or damage. Apply Teflon tape to the threaded ends of the fittings to ensure a secure and watertight connection. If soldering is required, follow proper soldering techniques and ensure a clean and smooth connection.

Install the New Valve

Carefully position the new Zurn Wilkins XL600 valve in the mounting location, aligning the fittings with the corresponding pipes. Begin by hand-tightening the fittings, ensuring they are properly aligned. Then, use a wrench to securely tighten the connections, but be cautious not to over-tighten and risk damaging the fittings or the valve.

Test the Installation

Once the new valve is securely installed, it’s essential to test the system for any leaks or issues. Slowly turn on the main water supply and check for any water leakage around the connections. Monitor the system for a few minutes to ensure there are no signs of leakage or abnormal pressure fluctuations.

Make Adjustments if Necessary

In some cases, slight adjustments may be required after the initial installation. If you notice any minor leaks or issues, carefully inspect the connections and fittings. Make necessary adjustments, such as tightening the fittings or applying additional Teflon tape, to ensure a watertight seal.


Replacing a Zurn Wilkins XL600 (1.5″) pressure reducing valve may seem like a daunting task, but with proper preparation and careful execution, it can be accomplished successfully. By following the step-by-step guide outlined in this blog, you can confidently replace the valve and ensure a reliable and efficient plumbing system.

Remember to gather the necessary tools and materials, shut off the water supply, drain the system, remove the old valve, prepare and install the new valve, test the installation for leaks, and make adjustments if necessary.