When is it time to swap out old pipes?

That metallic taste is the worst, right? I keep wondering if I’m drinking more iron than coffee some days. Did you do a full repipe or just swap out the worst sections? I’m always nervous about what’s hiding behind the walls…

That metallic taste is honestly the worst - makes you wonder what’s actually in the water, right? I totally get being nervous about what’s behind the walls. Sometimes you open things up and it’s way more gnarly than you expected, but other times it’s not as bad as you think.

A lot of folks just swap out the worst sections at first, especially if the budget’s tight. But if you’re already seeing rust or tasting metal, there’s a good chance the rest isn’t far behind. I’ve seen people do a patch job and then end up chasing leaks for months... not fun. Still, a full repipe can be a big project, so I get wanting to hold off.

If you do end up opening up a wall, just be careful - sometimes there’s old insulation or even wiring that’s not up to code. Better safe than sorry, even if it takes a bit longer.

I hear you on the patch jobs turning into a never-ending project - been there, done that. When we moved in, I figured I’d just replace the worst stretch under the kitchen sink, but then a year later, the bathroom line started leaking too. It’s like playing whack-a-mole with old pipes.

Here’s how I try to break it down: First, I check for visible rust or corrosion at any exposed joints. Then I look for water pressure drops or weird smells/tastes (like that metallic thing you mentioned). If two or more of those pop up, I start budgeting for a bigger replacement, even if it’s just in phases.

One thing I’m still not sure about is whether it’s better to do whole-house PEX if you’re already opening up walls, or just stick with copper for the sections you can see are bad. Anyone have thoughts on how to weigh cost vs. long-term reliability? Sometimes it feels like you’re just gambling either way...

Honestly, patching old pipes is just delaying the inevitable. Once you start seeing multiple leaks or corrosion, it’s usually a sign the whole system’s on borrowed time. I lean toward PEX for full replacements - less labor, fewer joints to fail, and it handles freezing better than copper. Copper’s great, but prices are wild and it’s not immune to pinhole leaks, especially with older water systems. If you’re already opening walls, might as well future-proof it instead of chasing leaks every year.

That’s a really solid point about patching just being a temporary fix. I’ve been going back and forth on this exact issue since moving in last year. We had one leak, then another, and it’s hard not to feel like you’re just playing whack-a-mole. The idea of ripping out all the old copper and putting in PEX is intimidating, though. I keep worrying about whether it’ll actually last as long as people say, or if there’s some downside I’m missing.

Still, your argument about future-proofing makes sense, especially if you’re already opening up walls. It’s just tough to swallow the upfront cost, but I guess constantly patching isn’t cheap either. I appreciate hearing from someone who’s actually made the switch - it helps to know it’s not just marketing hype. Maybe it’s time to stop being so cautious and just get it done before things get worse...

I get where you’re coming from - it’s a big decision. When I finally bit the bullet and swapped my old copper for PEX, I was nervous too. Honestly, the peace of mind after was worth it. I haven’t had a single leak since, and I used to be on first-name terms with my plumber. Sure, the upfront cost stings, but constantly patching just adds up over time. If you’re already opening walls, it really is the best shot at future-proofing. Just double-check your local codes; some places still have weird restrictions on PEX, which surprised me.

If you’re already opening walls, it really is the best shot at future-proofing.

That’s exactly what pushed me over the edge. Once you’ve got drywall dust everywhere and your living room looks like a construction zone, it feels kind of pointless to put old pipes back in. I was on the fence for ages because yeah, the cost isn’t nothing, but patching leaks every few months gets old fast. Plus, I swear my copper pipes were starting to look like Swiss cheese.

I’ll admit, I was a little skeptical about PEX at first - heard some horror stories about rodents chewing through it or weird taste in the water. But honestly? No issues so far. The plumber even finished faster than I expected, which never happens.

One thing though - I did run into some local code nonsense. Had to get a special permit and all that jazz. Worth checking before you start tearing things out or you’ll end up with a half-finished project and a lot of explaining to do when the inspector shows up...

Definitely agree - once the walls are open, it’s the perfect time to swap out old lines. Here’s how I look at it step-by-step:

1. Check pipe condition - if you’re seeing corrosion or pinhole leaks, that’s a red flag.
2. Research local codes before you touch anything. Some areas are picky about PEX or even require specific fittings.
3. If you’re worried about rodents and PEX, there are sleeves and wraps that help (though I’ve only seen issues in crawlspaces).
4. Always label everything as you go, especially if you’re DIY-ing. Makes inspection way smoother.

I used to think copper was the gold standard, but after seeing how fast PEX goes in - and how much less wall gets torn up - I’m kinda sold on it too. Just wish permits weren’t such a hassle...

Copper used to be my go-to too, but after getting a quote for a small bathroom reno, I started looking at PEX just to keep costs down. Honestly, the speed and flexibility sold me. Only thing I’d add - if you’re on a tight budget, check if your city offers any permit fee waivers for DIYers. Mine did, but it was buried on their website. Saved me a couple hundred bucks. And yeah, labeling everything is a lifesaver when you’re staring at a mess of pipes later...

PEX has definitely changed the game for small renos. I remember when running copper through a tight crawlspace felt like wrestling an octopus - now with PEX, it’s more like threading a garden hose. That said, I still see a lot of folks defaulting to copper just because “that’s how it’s always been done.” There’s nothing wrong with copper, but unless you’re dealing with high heat or exposed lines where aesthetics matter, PEX is usually more forgiving and budget-friendly.

Permit waivers are a great tip. I’ve seen people get tripped up by surprise fees or, worse, skip the permit altogether and run into headaches when they go to sell. Cities don’t exactly advertise those waivers, either... you’ve got to dig for them. It’s worth the effort, though - nobody wants to pay more than they have to for paperwork.

Labeling is one of those things that seems unnecessary until you’re staring at a spaghetti bowl of pipes behind a wall. I’ve had to trace lines in 100-year-old houses where someone thought “I’ll remember which one is which.” Spoiler: they never do. Even just masking tape and a Sharpie can save hours down the line.

One thing I’d add - if your old pipes are showing green corrosion, pinhole leaks, or you’re getting rusty water, that’s usually a sign it’s time to swap them out. Sometimes people wait until there’s a major leak, but by then you’re looking at drywall repairs too. If you’re already opening up walls for a reno, it’s usually cheaper in the long run to replace old lines while you’re in there. Nobody wants to finish tiling just to have to rip it all out again six months later.

PEX isn’t perfect - rodents can chew through it if you’ve got that problem, and UV light will break it down if it’s exposed - but for most bathrooms and kitchens, it’s hard to beat for cost and speed. Just make sure you use the right fittings and tools; I’ve seen some creative “solutions” that didn’t end well.

Anyway, swapping pipes is one of those things where an ounce of prevention really does save a pound of headaches. If you’re on the fence, check what kind of shape your current pipes are in before making the call.

- Ran into this exact scenario last year during my kitchen reno. Thought I could get away with leaving the old galvanized pipes since “they’re still working,” but then I found a section that was basically held together by rust and hope.
- Agree on swapping when you see green corrosion or pinhole leaks. In my case, the water pressure had been dropping for months, but I just chalked it up to the old faucet. Turns out, the inside of those pipes looked like a clogged artery.
- PEX made the replacement way less painful than I expected. Crawling under the house with copper would’ve been a nightmare.
- One thing I’d question - does anyone else worry about PEX longevity? I know it’s supposed to last, but I’ve heard mixed things about fittings failing if you don’t use the right crimp tools.
- Labeling is a must. I skipped it once and spent an afternoon playing “guess which shutoff does what.” Never again.
- If you’re already opening up walls, just do it. Waiting for a leak is tempting fate, and drywall repairs are never as easy as they look on YouTube...

Funny timing - I just finished chasing down a mystery leak behind my laundry room wall, and it was the last bit of galvanized left in the house. I kept telling myself, “It’s fine, it’s lasted this long,” but yeah, turns out 60-year-old pipes don’t age like wine. The inside looked like a science experiment gone wrong.

On the PEX thing, I get the hesitation. I did a ton of reading before switching over, and it seems like most of the horror stories come from folks using cheap fittings or not getting the crimp right. I went with the expansion fittings (the ones with the big blue tool) and so far, no issues. Still, I find myself checking for leaks every time I walk by, just in case.

Labeling - 100% agree. I thought I’d remember which line went where. Spoiler: I did not. Ended up turning off the water to the whole house just to swap out a faucet. Never again.

If you’re already opening up walls, might as well do it right. Drywall patching is way less fun than it looks on YouTube... especially if you’re not a pro.

- That “science experiment” look inside old galvanized pipes is wild, right? I pulled one out last year and couldn’t believe the buildup.
- I’m with you on the PEX expansion fittings - seems like fewer issues with leaks, but I still get nervous about plastic in the walls. Wondering if anyone’s seen long-term downsides, especially for water quality?
- Labeling is one of those things I always *think* I’ll remember, but nope. Sharpie is my new best friend.
- Curious - did you consider copper at all, or was it just too pricey or not eco-friendly enough? I’ve heard mixed things about the environmental impact of PEX vs. copper, but not sure what’s actually better in the long run...

Copper’s still my go-to for reliability, even if it costs more up front. PEX is fine, but I’ve seen some weird taste issues in the first year or two - nothing major, but worth noting.

“I still get nervous about plastic in the walls.”

- Copper’s solid, no doubt, but man, sweating those joints in tight spots is a pain - burned my knuckles more than once.
- PEX is just so much faster to run, especially if you’re dealing with weird angles or retrofits. The taste thing? Yeah, noticed it too, but it usually fades after a bit.
- I get the plastic-in-the-walls paranoia. My uncle’s place had a PEX line pop off because someone skipped a clamp... water everywhere. Not fun.
- For resale, copper does look better on paper, but most buyers probably won’t even know what’s behind the drywall unless there’s an issue.
- If your old pipes are getting green crusties or you’re seeing pinhole leaks, that’s when I’d start thinking swap - not just because it’s old. Sometimes old copper outlasts the new stuff anyway... go figure.

Honestly, both have their headaches. Just depends how much you like crawling around with a torch versus snapping fittings together and hoping for the best.

If your old pipes are getting green crusties or you’re seeing pinhole leaks, that’s when I’d start thinking swap - not just because it’s old.

Couldn’t agree more with this. Some folks get spooked just by the age of their pipes, but if they’re not leaking or corroding, why mess with them? I’ve seen copper from the 60s still going strong, while newer stuff sometimes fails early. PEX is a breeze to install, but yeah, skipping a clamp is a nightmare waiting to happen... Seen it once and it was a total mess. At the end of the day, it’s about what you’re comfortable working with and what your house actually needs.

Honestly, I was in the same boat when I bought my place last year. The inspector flagged the pipes as “old but functional,” and I spent weeks worrying if I should just bite the bullet and redo everything. Ended up leaving them alone, and so far, no regrets. Like you said, age alone isn’t a dealbreaker - my neighbor’s got copper from the 50s and it’s still kicking.

I do keep an eye out for those green spots and any weird leaks, though. Had a friend who ignored a tiny pinhole and it turned into a full-on ceiling disaster... lesson learned there. PEX is tempting for the DIY factor, but I’m always paranoid I’ll mess up a fitting somewhere behind a wall and not know until it’s too late.

Guess it comes down to how much peace of mind you want versus the hassle and cost. For now, I’m just keeping a close watch and saving up in case things go sideways.

PEX is tempting for the DIY factor, but I’m always paranoid I’ll mess up a fitting somewhere behind a wall and not know until it’s too late.

Man, I totally get that. I swapped out a section of galvanized for PEX in my laundry room last winter - figured it was a “safe” spot to experiment. The sharkbite fittings are supposed to be foolproof, but I still checked every joint like ten times before closing up the wall. No leaks yet, but I’m still half-expecting to find a puddle one morning. Honestly, as long as you’re not seeing corrosion or weird water pressure drops, keeping an eye on things seems smart. The peace of mind is nice, but ripping out perfectly good pipe just for the sake of it feels like overkill... unless you’re already remodeling anyway.

I’m in the same boat - always weighing cost vs. risk. Last year, I only replaced a short run of old copper that was starting to turn green at the joints. Figured if it’s not leaking or causing pressure issues, why mess with it? I do worry about hidden leaks with PEX, but honestly, I’d rather keep an eye on things than tear up walls for no reason. If it ain’t broke...

Had the same debate last winter. Ended up leaving most of my 60s copper alone, just swapped out a section that was getting crusty near the water heater. I get nervous about PEX too - heard stories about rodents chewing it. For now, I’m just checking for leaks every few months and hoping for the best... seems like overkill to rip everything out if it’s still holding up.