How To Plumb A Shower Head With PEX: A Step-by-Step Guide for Beginners

Why Pluming a Shower Head with PEX Is the Smart Choice (And How You Can Do It Yourself)

You’re standing in your bathroom, staring at a leaky shower head or an outdated copper pipe system that’s been dripping for months. You’ve called a plumber—twice—and each time, the quote was over $400. You’re tired of paying high labor costs just to fix something that should be simple. What if you could replace that old plumbing yourself—with tools you already own—and do it right the first time?

That’s where how to plumb a shower head with PEX comes in. PEX (cross-linked polyethylene) is the modern, flexible, and affordable alternative to rigid copper or PVC. It’s used in over 80% of new U.S. home constructions (source: National Association of Home Builders, 2023), and for good reason: it’s easier to install, resists freezing, and lasts decades.

This guide walks you through every step—no experience required. We’ll cover tools, safety, common mistakes, and even how to test your work before turning the water back on. By the end, you’ll not only know how to plumb a shower head with PEX, but you’ll feel confident doing it again.

Why PEX Over Copper? The Pros and Cons (At a Glance)

Before we dive into the steps, let’s quickly compare PEX with traditional copper plumbing. This isn’t just theory—it’s based on real homeowner feedback and plumbing industry data.

“PEX is the most game-changing material in residential plumbing since the invention of PVC.”
— Mike Smith, Master Plumber & Host of “Plumbing Made Simple” (YouTube, 2.1M subs)

If you’re looking to save money, reduce stress, and avoid soldering burns, PEX is your best bet.

What Tools and Materials Do You Need?

You don’t need a professional toolkit. Here’s what you’ll actually use:

✅ Essential Tools:

• PEX crimp tool (or pinch clamp tool) – $40–$70
• PEX tubing cutter – $15
• Tape measure – any standard one
• Adjustable wrench – for connecting to fixture
• Screwdriver (flathead or Phillips)
• Safety glasses & gloves

✅ Materials:

• ½-inch PEX tubing (Type A or B) – buy 10–15 feet
• PEX-to-shower arm adapter (brass, ½-inch NPT male thread) – $8–$12
• PEX crimp rings or stainless steel clamps (depending on tool)
• Pipe insulation (optional, for cold climates)
• Teflon tape (plumber’s tape)

💡 Pro Tip: Always buy Type B PEX if you’re in the U.S.—it’s the most common and code-compliant for residential use. Type A is for radiant heating.

Step-by-Step: How to Plumb a Shower Head with PEX

Follow these 7 clear, numbered steps. We’re assuming you’re replacing an old shower arm connected to copper or galvanized steel. If you’re starting from scratch, the process is even simpler.

Step 1: Turn Off the Water and Drain the Line

• Locate your main water shutoff valve (usually near the water heater or in the basement).
• Turn it clockwise until fully closed.
• Open the shower faucet to drain residual water. Let it run for 2 minutes.⚠️ Never work on pressurized lines. A burst pipe can flood your home in seconds.

Step 2: Remove the Old Shower Arm

• Use an adjustable wrench to unscrew the old shower arm from the wall nipple.
• If it’s stuck, apply penetrating oil (like WD-40) and wait 10 minutes.
• Clean the threads on the wall pipe with a wire brush. Remove old Teflon tape.

Step 3: Measure and Cut the PEX Tubing

• Hold the PEX-to-shower arm adapter against the wall nipple. Mark where the PEX needs to end.
• Use the PEX cutter to make a clean, square cut.✅ Cutting tip: Never use scissors—they crush the tube and cause leaks.

Step 4: Insert the PEX into the Adapter

• Slide a crimp ring (or clamp) onto the PEX tube—about 1 inch from the end.
• Push the PEX firmly into the adapter’s barbed fitting until it hits the stop.
• Use your crimp tool to compress the ring evenly around the tube.🔧 Crimp Tool Trick: Place the tool’s jaws over the ring and squeeze until you hear a “click.” Don’t over-crimp—it can crack the PEX.

Step 5: Secure the Adapter to the Wall

• Wrap 3–4 layers of Teflon tape clockwise around the male threads of the adapter.
• Screw the adapter into the wall nipple by hand, then tighten with a wrench—only ¼ turn past hand-tight.⚠️ Over-tightening can crack the adapter or strip the threads. Less is more.

Step 6: Test for Leaks (CRITICAL STEP)

• Turn the water back on slowly.
• Let it run for 1 full minute.
• Check every joint: adapter, crimp ring, and where PEX connects to the valve.
• If you see even a drip, shut off water immediately and re-crimp or re-tape.

Step 7: Attach the Shower Head

• Screw your new shower head onto the PEX adapter.
• Hand-tighten only. No tools needed.
• Turn on the water again and enjoy your new, leak-free shower!

📌 Real-Life Case: In 2024, a homeowner in Minneapolis replaced her 30-year-old copper shower line with PEX after a freeze-induced burst. She spent $28 and 90 minutes. Her water bill dropped 12% the next month due to eliminated drips. Source: Minnesota Home Improvement Blog

Common Mistakes to Avoid When Pluming a Shower Head with PEX

Even experienced DIYers slip up. Here are the top 3 errors—and how to dodge them:

🌐 For code compliance and safety standards, always check your local plumbing code. Most U.S. states follow the IPC (International Plumbing Code)—see details at Wikipedia.org/wiki/International_Plumbing_Code .

FAQ: Your Top Questions About Plumbing a Shower Head with PEX, Answered

Q1: Can I use PEX for a shower head if my house has copper pipes?

Absolutely. PEX connects easily to copper using a sharkbite fitting or a threaded brass adapter (which we used in this guide). No soldering required. Many homeowners retrofit PEX into older homes without tearing out walls.

Q2: Does PEX last as long as copper?

Yes—PEX lasts 40–50 years under normal conditions, according to the Plastic Pipe Institute. Copper can last just as long, but is far more prone to corrosion in hard water areas. PEX wins in durability and cost over time.

Q3: Can I install PEX myself, or do I need a permit?

In most U.S. states, DIY plumbing is allowed for simple fixture replacements like shower heads. However, if you’re modifying the main water line or adding a new valve, check with your local building department. Permits are usually free and take 1–2 days to approve.

Q4: What’s the best PEX brand for beginners?

We recommend Uponor (formerly Wirsbo) or Rehau. Both are widely available at Home Depot and Lowe’s, come with clear labeling, and are compatible with most tools. Avoid no-name brands—they may not meet ASTM F876 standards.

Q5: Will PEX freeze and burst in winter?

PEX is more freeze-resistant than copper because it expands slightly under pressure. But it’s not freeze-proof. Always insulate exposed pipes in unheated areas (garages, attics). Use foam pipe insulation sleeves—they cost less than $1 per foot.

Q6: Can I use PEX with a rain shower head or high-pressure system?

Yes! PEX is rated for 160 PSI and temperatures up to 200°F. Most residential showers run at 40–80 PSI. As long as your water pressure is under 80 PSI (use a gauge to check), PEX handles it effortlessly.

Final Thoughts: You’ve Got This

Plumbing a shower head with PEX isn’t just a DIY project—it’s a smart, money-saving upgrade that improves your home’s longevity and comfort. You’ve learned how to cut, connect, and test PEX like a pro. No more waiting for a plumber. No more dripping ceilings. Just clean, quiet, reliable water flowing from your shower.

And here’s the best part: once you’ve done this once, you’ll feel empowered to tackle other bathroom upgrades—like replacing a sink faucet or installing a new toilet. PEX makes it all possible.

💡 Ready to share your success?
Tag a friend who’s tired of leaky showers. Share this guide on Pinterest or Facebook with #PEXPlumbingWin. Your next door neighbor might be facing the same problem—and you just gave them the solution.

✅ Summary Checklist: How To Plumb A Shower Head With PEX
☐ Turn off main water
☐ Drain old line
☐ Remove old shower arm
☐ Cut PEX cleanly
☐ Slide crimp ring + insert into adapter
☐ Crimp with proper tool
☐ Wrap Teflon tape
☐ Screw adapter into wall (hand-tight + ¼ turn)
☐ Test for leaks
☐ Attach shower head

You did it. Now go enjoy your perfectly plumbed shower. 🚿