How long do pipes really last under pressure?

Honestly, I get where you’re coming from about just replacing sections - especially when you said,

“patching things up just isn’t worth the hassle or risk.”

But sometimes those old pipes have more life in them than we think. I’ve seen a few places where a good cleaning and some TLC bought folks years before a full replacement was needed. Not saying it’s always the best call, but if the budget’s tight and the main lines aren’t showing major issues, sometimes a little maintenance can stretch things out. Just depends on how much “vintage charm” you’re willing to gamble on, I guess.

I’ve always wondered where the line is between “just patch it up” and “rip it all out.” It feels like every plumber I talk to has a different answer, and honestly, sometimes I question whether it’s just about selling a bigger job. I had a duplex where the pipes looked ancient - galvanized, probably original to the house. One guy swore they’d last another decade if I just flushed them and replaced a couple joints. Another said I was asking for trouble and should just bite the bullet on a full repipe.

In your experience, how do you actually decide when a pipe’s genuinely at the end of its life? Are there warning signs that are reliable, or is it just a gamble every time? I get the appeal of stretching things out, especially when margins are tight, but I’ve also seen a “quick fix” turn into a flooded basement and a way bigger bill. I guess I’m just skeptical about how much faith to put in old infrastructure, especially when tenants are involved.

Do you think the type of pipe makes a difference? Like, is copper always worth saving over, say, old cast iron or galvanized? Sometimes I feel like it’s less about the age and more about what’s running through them - hard water, tree roots, that sort of thing. Or maybe it’s just luck of the draw.

Curious if anyone’s found a good rule of thumb, or is it always just a case-by-case call?

I get the appeal of stretching things out, especially when margins are tight, but I’ve also seen a “quick fix” turn into a flooded basement and a way bigger bill.

Man, I hear you on this. I’ve been in almost that exact spot - trying to save a few bucks with a patch job, only to end up spending way more after a pipe burst behind the wall. Not fun.

From what I’ve seen, galvanized is usually the first to go, especially if your water’s hard or you get those weird pressure drops. Copper can last forever if it’s not corroded, but I had a section rot out from pinhole leaks thanks to old insulation trapping moisture. It’s not always about age - sometimes it’s just what those pipes have been through.

I lean toward “if you’re opening up walls anyway, do the upgrade,” but otherwise I’ll stretch things as long as there’s no rust in the water or visible leaks. Still, it does feel like rolling dice sometimes. Honestly, your gut feeling plus what you can actually afford tends to be as reliable as any “rule.”

Yeah, I totally get where you’re coming from. I’ve had my share of “temporary” fixes that turned into way bigger headaches down the line. Sometimes it feels like you’re just gambling with old pipes - one day they’re fine, next day you’re mopping up a mess. I’m with you on upgrading if you’ve already got the walls open. It’s not always easy on the wallet, but man, peace of mind is worth something too. Funny how pipes can look solid for decades and then suddenly decide to give up...

Honestly, I hear you about the “temporary” fixes. I’ve patched a leak or two myself, thinking I’d just get through the season, and then months later I’m staring at water stains on the ceiling and cursing my own shortcuts. It’s wild how you can think a pipe is totally fine - no rust, no weird noises - and then boom, it’s leaking behind a wall you just painted.

I lean toward fixing things right when the walls are open too, but man, the cost adds up fast. Here’s how I usually break it down:
1. Figure out what kind of pipes you’ve got (copper, PEX, galvanized, whatever).
2. Check for any obvious corrosion or weird smells in the water.
3. If you’re already gutting a room and the pipes are old, I’d say bite the bullet and replace them if you can swing it.
4. If money’s tight (which it usually is for me), I’ll prioritize the worst sections - like anything near joints or where there’s visible damage.

I do wonder though - has anyone actually had luck with those pipe lining services? The ones that claim to re-coat your old pipes from the inside? Seems too good to be true, but maybe I’m just skeptical because every “shortcut” I’ve tried has come back to haunt me.

Curious if anyone’s ever regretted not replacing everything while they had access. Sometimes I feel like we’re all just rolling the dice with this stuff...