Dealing with old pipes during a bathroom overhaul - worth replacing or just patching up?

Title: Dealing With Old Pipes During A Bathroom Overhaul - Worth Replacing Or Just Patching Up?

I’ve run into this dilemma on a few projects, and it always feels like a balancing act. When I’m planning a bathroom refresh, I tend to think about the “hidden” details as much as the finishes - because nothing ruins a gorgeous tile job faster than a leak behind the wall. If you’re already opening things up, it’s an opportunity to future-proof, but I get that not everyone has the budget for a full overhaul.

One thing I’ve noticed: even if pipes look decent, sometimes there’s unseen buildup or corrosion that doesn’t show until it’s too late. I’d focus on replacing anything that looks even remotely questionable, especially around fixtures you’re updating. As for PEX vs copper, PEX is definitely easier to work with and less disruptive to install, especially in tight spaces. I’ve specified it for several remodels and haven’t had any complaints yet, but I do make sure it’s high quality and properly supported.

If you’re keeping some old lines, maybe document exactly where they run before closing up - just in case. It’s not glamorous, but it can save headaches down the line.

“nothing ruins a gorgeous tile job faster than a leak behind the wall.”

That hits home. I once spent weeks on a mosaic shower wall, only to have a pinhole leak in an old copper line show up a year later - total heartbreak. Ever since, if I’ve got the walls open and the pipes are even a little sketchy, I just bite the bullet and swap them out. It’s not the fun part, but it’s way better than tearing out your hard work down the road. PEX has been a lifesaver for me in tight spots, too.

“if I’ve got the walls open and the pipes are even a little sketchy, I just bite the bullet and swap them out.”

I hear you, but sometimes I wonder if we’re being too quick to replace. Ever pressure test old copper before deciding? I’ve seen 60-year-old lines hold up fine, but then again, one hidden pinhole and it’s game over. How do you decide when it’s worth the risk?

Ever pressure test old copper before deciding?

Yeah, I’ve pressure tested plenty, but honestly, if the pipes look rough or have green spots, I just swap them. You’re already in there - no sense risking a leak behind new tile. Seen too many callbacks from “good enough” lines.

Couldn’t agree more about not trusting “good enough” when you’re already tearing things up. I’ve seen folks try to save a few bucks by leaving sketchy copper in place, only to end up ripping out fresh tile six months later. If it looks suspect - especially with those green crusty spots - it’s just not worth the gamble. You’ll sleep better knowing it’s all new behind the walls.