Honestly, I get the worry about mixed materials, but in my experience, PEX and copper can actually play pretty well together if the fittings are solid and you keep an eye on things. I wouldn’t stress too much about the green stains unless they’re spreading or you see actual drips. Sometimes those little signs are just cosmetic, especially if you’ve got older copper. If you want to be extra cautious, I’d check under sinks and behind appliances every few months—catching a slow leak early is way less painful than dealing with a surprise flood.
I get what you’re saying about cosmetic stains, but I’ve always wondered if there’s a way to tell when those green marks actually mean trouble. I’m trying to avoid unnecessary costs, but I also don’t want to ignore a warning sign. Has anyone noticed if water pressure changes when pipes start to go, or is it more about visible leaks? I’ve got a mix of PEX and copper too, and I’m not sure which one’s more likely to fail first under constant pressure...
Title: How long do pipes really last under pressure?
I’ve been down this road with my old house—copper in the basement, PEX upstairs from a reno about ten years ago. Those green stains on copper always made me nervous, but in my case, they were mostly from condensation and not actual leaks. I did have one spot where the green turned kind of crusty and white, and that’s where I eventually found a slow drip. Never noticed any water pressure drop before that, though. The leak was so tiny it just left a little puddle every few days.
With PEX, I haven’t seen any visible warning signs at all. No stains, no weird noises, nothing. But I did hear from a plumber buddy that PEX can sometimes fail at the fittings if they weren’t crimped right or if there’s a lot of UV exposure (which is rare inside walls). He said copper tends to give you more visual clues—like those stains or even pinhole leaks—while PEX just... goes when it goes.
One thing I did notice: when my neighbor had a pressure regulator fail, his copper pipes started making banging noises (water hammer) and he got some leaks at the joints after a while. Made me wonder if high pressure is harder on copper than PEX? Or maybe it’s just older solder joints giving up.
Have you ever checked your water pressure with a gauge? I picked one up for like $15 and it was eye-opening—my pressure was way higher than I thought. Dialing it back seemed to help with some of the creaks and groans in the pipes.
Curious if anyone else has had PEX issues crop up out of nowhere, or if copper really does give you more warning before things go south...
I swear, pipes are like the divas of home infrastructure—some love the spotlight (copper with its dramatic green stains), while others just quietly implode backstage (looking at you, PEX). I’ve seen copper pipes throw a fit with high pressure, especially if they’re older and the solder’s seen better days. PEX is more mysterious... no warning, just sudden chaos if a fitting fails. I always tell clients: check your pressure, and if your pipes start singing or sweating, it’s time for a little TLC. Water hammer is not the percussion section you want in your house.
Copper gets a bad rap for those green stains, but I’ve seen 60-year-old lines still holding up just fine—assuming nobody cranked the pressure way up over the years. PEX, on the other hand, is only as good as the install. If the fittings are cheap or not crimped right, yeah, you’re in for a surprise. But honestly, most pipe failures I’ve dealt with came down to poor water quality or shoddy work, not just pressure alone. Water hammer’s a symptom, not the root cause... usually means something else is off balance.