How long do pipes really last under pressure?

I totally get the “if it ain’t broke, don’t fix it” mindset, but I lean the other way when the walls are open. It’s not just about visible corrosion - sometimes the inside of those pipes is a mess and you’d never know until it fails. Had a buddy who thought his copper was fine, then found out the hard way during a remodel that half the pipe wall was gone from inside-out corrosion. Water quality’s a huge factor, yeah, but I guess I’d rather spend a bit more now than risk an emergency later... especially if I’m already tearing things apart for another reason. Just depends how much you want to gamble, I guess.

I hear you on the “might as well while it’s open” logic. I live in a house built in the 1920s, and let me tell you, old pipes are like ticking time bombs half the time. I used to be in the “leave it unless it’s leaking” camp, but then I had a section of galvanized pipe basically crumble in my hands during a bathroom reno. Looked fine from the outside, but the inside was like rusty cornflakes.

Thing is, I get why folks hesitate - the cost adds up fast, and sometimes you just want to get the kitchen back together before your sanity goes. But every time I’ve tried to cheap out and keep the old stuff “just a little longer,” it’s bitten me later. If the walls are open and you can swing it, swapping out old pipes is one of those things you’ll thank yourself for down the road... or at least curse yourself less when something does go wrong.

I get where you’re coming from - those costs really do pile up, especially if you’re already knee-deep in a reno. I had a similar debate with myself when we redid our laundry room. The plumber said the copper lines were “probably fine,” but they were pushing 50 years old. I hesitated, but ended up replacing just the worst-looking section to save money. Now I’m always half-worried about the rest... It’s tough to balance peace of mind with a tight budget, honestly. Sometimes I wonder if I should’ve just bit the bullet and done it all at once.

Honestly, I get the urge to save cash, but patching old copper always makes me nervous. Fifty years is a long time for pipes, and sometimes the “worst-looking” part isn’t actually the weakest spot. Ever had a pinhole leak pop up in a spot that looked fine? Happened to me last year - tiny drip, huge headache. I’d rather just deal with the mess once than keep worrying about what’s lurking behind the walls. But yeah, budgets are real... just not sure peace of mind has a price tag.

“Fifty years is a long time for pipes, and sometimes the ‘worst-looking’ part isn’t actually the weakest spot.”

- I get where you’re coming from, but I’ve had decent luck with targeted repairs.
- Last winter, found a green spot on a 40+ year old line - replaced just that section, kept the rest.
- Used a scope to check inside the walls. Not perfect, but better than guessing.
- Full repipe quotes were way out of my range. Patching bought me time to budget for bigger work.
- Yeah, it’s a gamble... but sometimes you gotta play the odds if cash is tight.

I totally get the “play the odds if cash is tight” approach. Sometimes you just have to prioritize, especially with older homes. I’ve seen a lot of places where the pipes look rough on the outside but are surprisingly solid inside - guess that’s why scopes are so handy. That said, I do think there’s a bit of a risk with patching, mostly because water damage can sneak up on you and mess with finishes or flooring before you even realize there’s a slow leak.

Here’s how I usually tackle it when I’m working around old plumbing during a remodel:

1. **Visual inspection first** - just like you did with that green spot. If something looks off, it probably deserves attention.
2. **Check water pressure** - sometimes low pressure hints at buildup or corrosion even if the pipe looks okay.
3. **Use a scope or camera** - not perfect, but it’s saved me from opening up more walls than necessary.
4. **Prioritize high-risk areas** - kitchens and bathrooms get the most use, so I focus repairs there first.
5. **Budget for future work** - patching is fine short-term, but I always try to plan for a full update down the line.

I do agree that full repipes can be crazy expensive. But sometimes, especially if you’re already opening up walls for another project, it’s worth biting the bullet and doing more at once. Had a client who tried to save by patching, only to end up redoing their brand new bathroom floor six months later because of an unrelated leak. Not fun.

“sometimes the ‘worst-looking’ part isn’t actually the weakest spot.”

That’s so true. I’ve seen pipes that look awful but hold up fine, and others that seem okay but are paper-thin inside. It’s kind of a guessing game unless you really dig in.

If you’re living with older pipes, I’d say keep an eye out for any changes - stains on ceilings, musty smells, or even tiny bubbles in paint can be early warning signs. And if you’re updating finishes anyway, maybe peek behind the walls while you’re at it... saves headaches later.

Anyway, targeted repairs make sense if you’re careful and keep tabs on things. Just don’t forget to factor in the “what if” costs down the road - it’s always a balance between budget and peace of mind.

- Love your checklist - especially the bit about budgeting for future work. From my side, I always get a little nervous when clients want to refresh a space but leave the old pipes untouched. You can design the prettiest bathroom, but if you get a leak under new tile... yikes.

- Curious if anyone’s actually factored in the cost of patching vs. just going for a full update? I’ve seen patch jobs go years without issues, but also watched one tiny drip ruin custom cabinetry in no time flat. Is there some magic number where it just makes sense to gut and redo?

Honestly, I get where you’re coming from - patching can be a gamble. I’ve had copper pipes last decades with just minor fixes, but one time a “quick patch” turned into a full-on flood behind the walls. Sometimes it’s worth biting the bullet and doing the full update if you’re already investing in a big reno. But yeah, it’s tough to know when that tipping point is... I usually weigh the age of the pipes and how much demo is involved. If you’re already tearing out tile, might as well check what’s underneath, right?

If you’re already tearing out tile, might as well check what’s underneath, right?

I get the logic, but I’ve seen folks go down that rabbit hole and end up gutting way more than they planned. Sometimes a patch really is all you need, especially if the rest of the system’s holding up and you’re not seeing signs of corrosion or leaks elsewhere. I’ve worked on places where 40-year-old copper was still solid - just needed a little TLC. Demo can snowball fast, especially in older homes where you never quite know what you’ll find behind the walls... Sometimes “while you’re at it” turns into a whole new project.

Ever get that feeling where you pull up a bit of tile and suddenly you’re Indiana Jones, uncovering ancient plumbing mysteries? I swear, every time I open up a wall in my place, I have to ask myself: do I really want to know what’s lurking back there, or am I better off leaving well enough alone? Has anyone here ever regretted NOT replacing old pipes when the opportunity came up? Or is it usually just fine to let sleeping pipes lie…

I have to ask myself: do I really want to know what’s lurking back there, or am I better off leaving well enough alone?

- If you’ve got galvanized or old copper, I’d lean toward replacing while you’re in there. It’s a pain to go back later.
- That said, I’ve left 70s copper alone in one bathroom reno and it’s still fine 8 years later. Sometimes you just gotta weigh the risk vs. budget.
- Regret usually comes when you see a leak after everything’s buttoned up... but honestly, not every old pipe is a ticking time bomb.

Ever run into any weird DIY “fixes” behind your walls? Found a garden hose used as a drain once - still can’t believe it worked.

I’ve definitely seen my share of “creative” plumbing behind the walls - flexible vinyl tubing for a hot water line once, and the classic duct-tape-over-pinholes trick. Honestly, sometimes I wonder if people just used whatever was in the garage.

I get what you’re saying about 70s copper. I’ve left some in place too, and it’s still holding up, but I always get that nagging feeling when I close up the wall. Like, is this the time it’s gonna fail? Hard to say if it’s paranoia or just experience talking.

Ever notice how some houses have pipes that look ancient but are totally fine, while others have newer stuff that’s already corroded? Makes me wonder how much is about water quality or maybe even how the house was originally plumbed. Anyone ever tested their water for corrosiveness before deciding whether to replace old pipes, or is that just overkill?

Testing for corrosiveness isn’t overkill at all - actually, it can save you a ton of headaches down the road. I’ve seen “new” PEX lines eaten up in less than a decade because the water was super acidic, while some old copper from the 60s still looks brand new. Here’s my typical approach: if I’m on the fence, I grab a water sample and run a quick test for pH and hardness. If you see greenish stains or blue residue around fixtures, that’s a red flag too. Sometimes it really is just about what’s flowing through those pipes, not how old they are.

That’s wild about PEX getting eaten up that fast. I’ve always assumed newer materials would automatically outlast the old stuff, but apparently not if the water’s off. I’m curious - if you spot those greenish or blue stains, is it always a sign of corrosion, or could it be something else? And does pH testing cover everything, or are there other tests you’d recommend before deciding to swap pipes? Water chemistry seems like such a hidden factor... makes me wonder how many remodels get tripped up by this kind of thing.

I’ve seen those blue-green stains pop up on fixtures and tile before, and yeah, it’s usually copper corrosion, but sometimes it’s just from water sitting too long or even certain cleaners reacting weirdly. pH is a big one, but I’ve also heard folks talk about testing for dissolved oxygen and even chlorine levels - apparently those can mess with pipes too. Ever had a plumber recommend a full water analysis before starting a remodel? Seems like it could save a lot of headaches down the line.

Honestly, I kinda think the water analysis thing gets overhyped sometimes. I mean, sure, if you’ve got weird stains or old pipes, it makes sense. But for a basic remodel? Half the time it’s just buildup from hard water or cheap cleaners. My last place had copper pipes from the ‘60s and they were still kicking - just needed a bit of TLC now and then.

Copper from the ‘60s is pretty solid, I’ll give you that. Those old pipes were built to last, and if you’re not seeing green corrosion or pinhole leaks, you’re probably fine for a while. Still, I wouldn’t write off water analysis completely. Sometimes it’s not just about stains or buildup - if you’re in an area with aggressive water (low pH, high chlorides), even copper can get eaten up faster than you’d expect.

I’ve seen houses where the pipes looked fine on the outside but were thinning out inside from years of acidic water. You don’t always catch that with a quick visual check. That said, for a basic remodel, I usually just check for obvious issues - discoloration, leaks, weird smells. If everything looks and smells normal, and you’re not getting blue-green stains in the sinks, you’re probably good.

Honestly, half the time people freak out about their pipes when it’s just hard water scale or cheap fixtures breaking down. A little vinegar and elbow grease goes a long way. But if you’re already opening up walls or floors, it’s not a bad idea to at least take a look at what’s going on with the pipes. Saves you from having to rip things up again later if something does go wrong.

Long story short: copper can last 50+ years easy, sometimes more, but local water chemistry and how the system’s been treated make a big difference. If you’re not seeing any red flags, I wouldn’t stress too much. Just keep an eye out for changes - pressure drops, weird tastes, or new stains. That’s usually your first sign something’s up.

- I’m in the middle of a reno and this is exactly what I’ve been wondering about.
- Pipes look fine from the outside, but I keep thinking - what if there’s something going on inside that I can’t see?
- Water here is pretty hard, but not acidic. No blue-green stains or weird smells so far.
- Is it worth getting a water test just for peace of mind, or am I overthinking it?
- Kinda tempted to just leave the copper alone unless I see something obvious... but then again, ripping up new drywall later would suck.
- Anyone ever regret not replacing old copper when they had the chance?

I get where you’re coming from - ripping out drywall later is a nightmare. I’ve lived in a 1920s place for years, and the copper’s held up way better than I expected. Like you, I worried about what I couldn’t see, especially with hard water. Ended up getting a basic water test during my last reno, mostly for peace of mind. It wasn’t expensive, and it actually told me more about sediment and mineral build-up than I thought it would.

Honestly, if you’re not seeing stains or smelling anything funky, and your water pressure’s steady, you’re probably fine. Copper can last decades, especially if the water isn’t acidic. That said, if the pipes are original and you already have everything open, it might be worth at least checking for pitting or green spots at joints. I skipped a couple sections behind finished walls once - regretted it when a pinhole leak popped up five years later. Not the end of the world, but definitely annoying.

You’re not overthinking it. It’s just one of those “pay now or maybe pay more later” situations...

I get the “pay now or maybe pay more later” logic, but I gotta say - sometimes you just end up paying both ways.

“I skipped a couple sections behind finished walls once - regretted it when a pinhole leak popped up five years later.”