
Installing a shower valve with PEX (cross-linked polyethylene) piping is a common plumbing task that can be accomplished with the right tools and knowledge. PEX is favored for its flexibility, durability, and resistance to corrosion, making it an excellent choice for shower installations. The process typically involves turning off the water supply, removing the old valve, preparing the PEX pipes, and then installing the new valve by connecting the PEX pipes to the valve body. Ensuring proper fittings and secure connections is crucial to prevent leaks and ensure a long-lasting installation. This guide will walk you through the steps required to successfully install a shower valve using PEX piping.
| Characteristics | Values |
|---|---|
| Task Type | Plumbing installation |
| Difficulty Level | Intermediate |
| Required Tools | Adjustable wrench, PEX cutter, PEX crimping tool, Teflon tape, Pipe dope |
| Materials Needed | PEX piping, Shower valve, Fittings, Fasteners |
| Estimated Time | 2-4 hours |
| Safety Precautions | Turn off water supply, Wear gloves and safety glasses |
| Steps Involved | 1. Turn off water supply, 2. Remove old valve, 3. Measure and cut PEX pipe, 4. Install new valve, 5. Connect PEX pipe to valve, 6. Secure valve to wall, 7. Turn on water supply, 8. Test for leaks |
| Common Mistakes | Not turning off water supply, Improperly cutting PEX pipe, Failing to secure valve properly |
| Tips for Success | Use Teflon tape on threaded connections, Apply pipe dope to ensure watertight seal, Crimp PEX fittings securely |
| Code Compliance | Must adhere to local plumbing codes and regulations |
| Warranty Information | Typically covered under manufacturer's warranty for defects |
| Maintenance Advice | Regularly check for leaks, Clean valve and PEX pipe periodically |
| Environmental Impact | PEX piping is recyclable, Consider water-saving shower valves |
| Cost Estimate | $50-$150 for materials, $200-$500 for professional installation |
| DIY Suitability | Suitable for DIY enthusiasts with intermediate plumbing skills |
| Professional Assistance | Recommended for complex installations or if unsure of procedures |
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What You'll Learn
- Gather Materials: Collect necessary tools and parts, including PEX pipes, fittings, and a shower valve
- Turn Off Water: Ensure water supply is off to avoid leaks during installation
- Measure and Cut PEX: Measure the required length of PEX tubing and cut it using a PEX cutter
- Install Fittings: Attach PEX fittings to the cut tubing, ensuring a secure and leak-proof connection
- Mount Shower Valve: Fix the shower valve to the wall, connecting it to the PEX tubing

Gather Materials: Collect necessary tools and parts, including PEX pipes, fittings, and a shower valve
Before embarking on the installation of a shower valve using PEX pipes, it's crucial to gather all the necessary materials and tools. This ensures a smooth and efficient process, minimizing delays and potential errors. The essential items include PEX pipes, which are known for their durability and ease of installation, and fittings that are compatible with the pipe size and the shower valve. Additionally, you'll need a shower valve that suits your specific requirements, such as the number of outlets and the type of handle.
When selecting PEX pipes, consider the diameter and length needed for your installation. Common diameters for shower installations are 1/2 inch and 3/4 inch. The length of the pipe will depend on the distance between the water source and the shower head. It's advisable to purchase a little extra pipe to account for any unforeseen issues or adjustments during installation.
Fittings are critical components that connect the PEX pipes to the shower valve and other fixtures. Ensure that the fittings are of the same diameter as the pipes and are designed for PEX material. You may need elbows, tees, and couplings, depending on the layout of your plumbing. It's also important to have a PEX crimping tool or a PEX press tool to secure the fittings to the pipes properly.
The shower valve itself comes in various styles and configurations. Some valves have a single handle for controlling both water flow and temperature, while others have separate handles for hot and cold water. Consider the space available in your shower area and the aesthetic you prefer when choosing a valve. Additionally, ensure that the valve is compatible with the water pressure and temperature in your home.
Lastly, don't forget to collect other necessary items such as Teflon tape for threading connections, a pipe cutter or hacksaw for cutting PEX pipes, and a level to ensure that the valve is installed correctly. Having all these materials and tools at hand will make the installation process more manageable and help you achieve a professional-looking result.
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Turn Off Water: Ensure water supply is off to avoid leaks during installation
Before beginning the installation of a shower valve with PEX piping, it is crucial to ensure that the water supply is completely turned off. This step is vital to prevent any accidental leaks or water damage during the installation process. To do this, locate the main water shut-off valve in your home, which is typically found near the water heater or in the basement. Turn the valve clockwise until it stops, which should cut off the water supply to the entire house.
After shutting off the main water supply, it is a good practice to open a faucet in the shower area to drain any remaining water in the pipes. This will help to relieve any pressure and make the installation process safer and easier. Additionally, it is important to check that there are no leaks in the PEX piping or fittings before proceeding with the installation.
When working with PEX piping, it is essential to use the correct tools and techniques to avoid damaging the pipes or fittings. PEX pipes are more flexible than traditional copper or PVC pipes, but they can still be kinked or crushed if not handled properly. Use a PEX crimping tool to secure the fittings to the pipes, and ensure that the connections are tight and leak-free.
During the installation process, it is important to follow the manufacturer's instructions carefully. This will help to ensure that the shower valve is installed correctly and functions properly. Additionally, it is a good idea to have a second person assist with the installation, as this can make the process easier and safer.
Once the shower valve is installed, it is important to turn the water supply back on and check for any leaks. If there are any leaks, tighten the connections or replace any damaged fittings as necessary. Finally, test the shower valve to ensure that it is functioning properly and providing the desired water flow and temperature.
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Measure and Cut PEX: Measure the required length of PEX tubing and cut it using a PEX cutter
To measure and cut PEX tubing for installing a shower valve, begin by determining the exact length needed. This involves measuring the distance from the water supply lines to the shower valve location, ensuring to account for any bends or turns in the tubing path. Use a flexible measuring tape for accuracy, especially when navigating around obstacles or through walls.
Once the required length is determined, select the appropriate PEX cutter for the job. PEX cutters come in various sizes and types, including manual and motorized options. For most residential installations, a manual PEX cutter will suffice. Ensure the cutter is designed for the diameter of the PEX tubing being used.
Before cutting, mark the tubing clearly at the measured length using a permanent marker or a piece of tape. This will help guide the cutting process and prevent errors. When cutting, hold the tubing firmly and use a smooth, controlled motion to make a clean cut. Avoid applying excessive force, which can cause the tubing to deform or the cutter to slip.
After cutting the PEX tubing to the desired length, inspect the cut end to ensure it is straight and free of burrs. Any rough edges or imperfections can interfere with the connection to the shower valve or other fittings. If necessary, use a utility knife or a file to smooth out the cut end.
Finally, dry-fit the cut PEX tubing into the shower valve and the water supply lines to ensure a proper fit before making the final connections. This step helps to identify any potential issues with the length or alignment of the tubing before committing to the installation.
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Install Fittings: Attach PEX fittings to the cut tubing, ensuring a secure and leak-proof connection
Begin by selecting the appropriate PEX fittings for your shower valve installation. Choose fittings that match the diameter of your PEX tubing and are compatible with the valve you're installing. Common fitting types include elbows, tees, and couplings. Ensure that the fittings are made of high-quality materials, such as brass or stainless steel, to prevent corrosion and leaks.
Next, prepare the PEX tubing by cutting it to the desired length using a sharp utility knife or PEX cutter. Be sure to cut the tubing cleanly and straight to ensure a proper fit with the fittings. Remove any burrs or debris from the cut edges to prevent damage to the fittings or leaks in the connection.
To attach the PEX fittings, use a PEX crimping tool or a PEX press tool. If using a crimping tool, slide the fitting onto the tubing and then use the tool to crimp the fitting securely onto the tubing. If using a press tool, insert the fitting into the tool and then press it onto the tubing until you hear a click, indicating that the connection is secure.
After attaching the fittings, inspect the connections carefully to ensure that they are tight and leak-proof. You can use a wrench to gently tighten the fittings, but be careful not to overtighten, as this can cause damage to the tubing or fittings. Once the fittings are securely attached, you can proceed with connecting the shower valve to the PEX tubing.
Remember to follow the manufacturer's instructions for both the PEX fittings and the shower valve to ensure a proper and safe installation. Additionally, be sure to turn off the water supply before beginning the installation process to prevent any accidental leaks or water damage.
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Mount Shower Valve: Fix the shower valve to the wall, connecting it to the PEX tubing
Begin by ensuring that the shower valve is properly aligned with the wall studs. Use a level to check that the valve is perfectly horizontal and vertical. Once aligned, mark the locations where the valve will be secured to the wall. Typically, this involves attaching the valve to the studs using screws or bolts. Make sure to use the appropriate fasteners for your specific valve model and wall type.
Next, connect the PEX tubing to the shower valve. This usually involves inserting the tubing into the valve's inlets and outlets, ensuring a snug fit. Use PEX clamps or crimp rings to secure the tubing in place, following the manufacturer's instructions for proper installation. Be cautious not to overtighten the clamps, as this can cause the tubing to crack or leak.
After connecting the PEX tubing, turn on the water supply to test the valve and connections. Check for any leaks around the valve and tubing connections. If leaks are present, tighten the connections or replace any damaged components as necessary. Once the system is leak-free, finish the installation by covering the valve with a decorative plate or trim, if desired.
Remember to follow all local building codes and regulations when installing a shower valve. If you are unsure about any aspect of the installation process, it is recommended to consult with a professional plumber to ensure a safe and proper installation.
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Frequently asked questions
To install a shower valve with PEX, you will need a PEX crimping tool, PEX cutter, adjustable wrench, plumber's tape, and a level. Additionally, having a pipe wrench and a hacksaw can be helpful for certain parts of the installation.
First, ensure the PEX pipes are cut to the correct length using a PEX cutter. Then, use a deburring tool to smooth out the edges of the cuts. Next, insert a PEX fitting into the end of each pipe and use a PEX crimping tool to secure the fitting in place. Make sure the fittings are compatible with your shower valve and the pipe size.
Begin by turning off the water supply to the shower. Then, remove the old shower valve if applicable. Next, apply plumber's tape to the threads of the shower valve where the PEX pipes will connect. Insert the PEX fittings into the valve and tighten them by hand, then use an adjustable wrench to ensure they are secure. Finally, turn the water supply back on and check for leaks.
Use a level to ensure the shower valve is aligned vertically and horizontally. Once the valve is in the correct position, secure it to the wall using the provided mounting hardware. Tighten the screws or bolts evenly to avoid damaging the valve or the wall. After securing the valve, double-check its alignment and make any necessary adjustments.











































