Honestly, you’re not alone in second-guessing this stuff. I see a lot of folks hesitate to swap pipes unless there’s an obvious problem, but if you’ve already got the walls open, it’s usually the smartest time to do it. Old copper can last a long time, but once it starts to go, it tends to fail in spots you can’t see—usually at the worst possible moment.
Here’s how I usually break it down:
1. If the pipes are showing signs of corrosion (greenish stains, pitting, or weird smells), that’s a red flag.
2. If you’re already doing a reno and have access, you’re saving yourself a ton of labor costs down the line.
3. Peace of mind is hard to put a price on, especially if you’ve ever dealt with a hidden leak and the mess that comes with it.
It’s not always easy on the budget, but in my experience, biting the bullet now saves a lot of headaches later. That said, if your pipes are in great shape and you’re not planning to stay long-term, sometimes it’s fine to leave them be. Just depends on your risk tolerance and how much you want to gamble with future repairs.
I get where you’re coming from, but I’ve got to push back a bit on the “just do it while the walls are open” logic. I’ve managed a bunch of rentals over the years, and honestly, sometimes replacing pipes just because you can ends up being overkill—especially if you’re dealing with decent copper that’s not showing any real issues.
Here’s what I always ask myself: Are there actual signs of trouble, or is it just the age? Because I’ve seen 60-year-old copper that’s still going strong, and I’ve also seen newer stuff fail early because of bad water chemistry or shoddy installation. If you’re not seeing corrosion, leaks, or weird pressure drops, is it really worth the extra cost and hassle? Especially if you’re running on a tight reno budget.
Another thing—sometimes opening up more of the system than necessary can introduce new problems. You swap out a section and suddenly you’re dealing with weird galvanic reactions between old and new metals, or you disturb something that was working fine before. Not saying it always happens, but it’s bitten me before.
And then there’s the tenant factor. If you’re renting out the place, sometimes “peace of mind” means not having to explain why their water was off for three days longer than planned because a simple reno turned into a full repipe job. That’s never fun.
I guess my take is: unless there’s clear evidence of trouble or you know for sure the pipes are at end-of-life (like old galvanized), sometimes leaving well enough alone is actually the smarter move. Just my two cents from too many years patching up old buildings...
Title: When is it time to swap out old pipes?
That’s a fair point about not fixing what isn’t broken, especially with copper. I’ve definitely fallen into the “while we’re in there” trap before and ended up chasing my tail with stuff that didn’t need messing with. One time I swapped out a section of perfectly fine copper just because it was old, and then spent two days trying to track down a tiny leak at a new joint—should’ve just left it alone.
But I do get a little twitchy about hidden corrosion or pinhole leaks that you don’t see until it’s too late. Maybe that’s just paranoia from dealing with one too many surprise ceiling stains. I guess for me it comes down to how much of the wall is open and how easy it’d be to get back in there later. If it’s a spot that’ll be a nightmare to access again, I might lean toward replacing, but otherwise, yeah, sometimes it’s better to just patch and move on.
Funny how much of this stuff is just gut feeling mixed with past regrets...
I get what you mean about that “while we’re in there” spiral. It’s so easy to convince yourself you’re saving future hassle, but sometimes you just end up creating new headaches. I’ve had similar regrets—replaced a section of galvanized that looked fine, only to have the new PEX fitting start weeping a month later. Sometimes the devil you know really is better.
Here’s how I try to break it down:
- If the pipe’s accessible and there’s visible corrosion or greenish buildup, I’ll swap it. Otherwise, I leave it.
- For hidden runs, especially behind tile or in ceilings, I’m more likely to replace if I’ve already got things open. The thought of tearing out a finished wall for a pinhole leak later just bugs me.
- Water quality matters too. We’ve got pretty hard water here, so I check for mineral buildup inside the pipes when I can. If it’s crusty, that’s a red flag.
- Age is tricky. Copper can last decades, but if it’s 50+ years old and I’m already doing a reno, I’ll at least inspect it closely.
I do wonder about the environmental side of it, though. Ripping out perfectly good copper or even PEX just because it’s “old” feels wasteful. But then again, a leak can cause way more damage and waste in the long run. Kind of a balancing act.
Has anyone tried those in-line water sensors that detect leaks? I’ve been thinking about installing one as a compromise—leave the old pipes but get an early warning if something goes wrong. Curious if they actually work or just end up being another gadget to babysit...
I’ve actually installed a couple of those leak sensors in my rentals—one’s a basic battery job, the other’s a smart one that texts me if it detects water. Honestly, they’ve saved me twice now, both times catching slow leaks under sinks before they turned into real disasters. I wouldn’t call them totally foolproof (false alarms from condensation once), but for the peace of mind, I’ll take it. Still, nothing beats just keeping an eye on old pipes, especially if you can see them. Sometimes I think we overthink it—if it’s not broke, don’t fix it... but have a backup plan just in case.