Why You Should Never Use PEX for a Tub Spout

Alright, let me just say this upfront: if you're using PEX for a tub spout, you're gonna have a problem. Not maybe. Not sometimes. Always.

I've seen it a million times, and it drives me nuts because even licensed plumbers forget this. And when they fail it, you're the one left with a bathroom that's somewhat functional but never quite right.

So let's break this down like we're talking over coffee at your kitchen table.

Here's the Deal

When you pull that diverter to switch from the tub to the shower, and you see a little stream of water still dribbling out of the tub spout… that's not a fluke. That's not your water pressure being "off." That's PEX being the wrong choice for that part of the job.

And here's why.

It's Physics, Not Preference

PEX tubing is just too narrow. That's it. The diameter is smaller than that of copper. So when you try to push that kind of pressure through PEX and up to a showerhead, the flow slows down. Not enough pressure builds up to divert the water entirely.

Result? You get a sad little leak at the tub spout every time you take a shower. It's annoying, wastes water, and honestly, it's just bad workmanship.

That's why we only use copper for the tub spout. Period.

Why This Matters to You

Now you might be thinking, "Okay, Mitch, but why should I care?" Totally fair. Let me break it down.

1. Water Waste Adds Up

That drip you see? Multiply that over hundreds of showers. It's money literally going down the drain.

2. Future Mold Issues

Water sitting around the base of your tub spout (especially if it pools) can lead to mold or mildew behind the wall. Not good.

3. It Just Feels Cheap

You paid for a shower that works. Not one that halfway works.

4. Resale Red Flags

Home inspectors catch stuff like this. If you're thinking of selling someday, this little detail could flag a bigger issue.

5. Fixing It Later Costs More

You'll have to tear out tile or panels just to replace a pipe. All because someone saved a few bucks and used PEX.

Real Talk from a Real Job

We had a homeowner in Cypress who kept hearing a drip after every shower. He thought it was the valve. Nope. The previous contractor used PEX all the way up to the spout.

We had to go in, pull the surround, and replumb it with copper. Wasn't cheap, but now he says it's the first time in years the shower's worked right.

He literally said, "I wish I had found you guys first. I wouldn't have had to do this twice."

Lesson learned: it's way cheaper to do it right the first time.

Key Takeaways

• PEX is fine for supply lines (hot and cold). Not for tub spouts.
• Copper handles pressure better, giving you a proper water-to-showerhead transition.
• If you've got a drip, it might not be your diverter. It could be the pipe.

A Word from a Happy Homeowner

"EZ Bath fixed what the other guys messed up. I thought the drip was normal—turns out it wasn't. Mitch and his team were the only ones who explained why and how to fix it for good."

– Steven R., Katy

FAQ

Q: Can I leave it as-is if the drip doesn't bother me?

A: You can, but it's a gamble. Over time, that moisture could cause damage behind your walls.

Q: Why would a plumber use PEX if it causes problems?

A: It's cheaper and easier to install. But cheaper isn't better when it comes to pressure flow.

Q: Is it a big deal to fix?

A: Depends on your setup. If you're already remodeling, we can do it no problem. If not, it might involve opening the wall. But we'll always walk you through it first.

No Pressure, Just Good Advice

If you're thinking about remodeling your bathroom—or just fixing something that's never worked quite right—reach out. No sales pitch. Just real answers.

Shoot me a text, give us a call, or send a message right here. The EZ Bath team (me, Ben, Cliff, Zack—we're all real people) is here to help.

You deserve a bathroom that actually works. Let's make it happen.

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