Regulators can definitely fail, but it’s not super common unless they’re really old or installed wrong. I’ve seen a couple that stuck open and spiked pressure—usually you’ll notice leaks at weak spots first, like old flex lines or crappy fittings. If you’re worried, just keep it under 75 psi and you’ll be fine. Most homes are safe around 60-70 psi anyway. If your pipes are ancient, maybe err on the lower side just in case.
I’ve run into my fair share of pressure regulator issues over the years, and I’d say your take is pretty spot-on. Most folks never even touch the regulator until something goes sideways—usually a leak somewhere sketchy, or suddenly the shower turns into a power washer. Had a call once where a guy’s regulator stuck open, and his old copper lines started weeping at every solder joint. He was lucky it didn’t turn into a full-blown flood.
You’re right about the weak spots showing up first. Those braided flex lines under sinks and behind toilets are always the first to go when pressure spikes. I’ve seen more than a few cheap ones burst and soak floors before anyone noticed. If you’ve got those, it’s not a bad idea to swap ‘em out for stainless if you’re already poking around.
Keeping things at 60-70 psi is usually safe, but I get a little twitchy if the house is pushing 75, especially on older plumbing. Sometimes the gauges aren’t dead accurate either, so I like to err on the side of caution. There’s no shame in dialing it down a notch if you’re worried about the pipes being ancient. Honestly, most fixtures don’t need firehose pressure anyway.
One thing I’d add: if you’ve just put in a booster pump to get the pressure up, make sure the regulator downstream is still doing its job. Had a situation last winter where someone added a booster and the old regulator couldn’t keep up. Ended up with a leaking water heater valve and a pretty grumpy homeowner.
It’s good advice to keep an eye on things, especially if your house is older or you’re running new equipment. A little caution goes a long way.
Funny you mention those flex lines—when I installed my booster pump, I thought I was being smart by bumping the pressure up just a little. Next thing I knew, the cheap line under my upstairs bathroom sink started dripping. Didn’t even notice until the cabinet started warping. Lesson learned: if you’re messing with pressure, swap out anything that looks even remotely sketchy. Also, I’m not convinced most regulators are as “set and forget” as people think... mine needed a tweak after the pump went in or the toilets wouldn’t stop hissing. Sometimes it feels like plumbing is just a series of small disasters waiting to happen.
Sometimes it feels like plumbing is just a series of small disasters waiting to happen.
That’s honestly the most accurate description I’ve heard in a while. I had a similar thing happen when I swapped out my old showerhead for a low-flow one—thought I was being eco-friendly, but the extra back pressure made an ancient valve start leaking behind the wall. Ended up tearing out half the drywall. You’re right about regulators too, they’re definitely not “set and forget” in my experience. It’s always something, but at least you caught it before it got worse.
I totally get the “series of small disasters” vibe. I’m still not convinced these low-flow fixtures are worth the hassle—mine made the pipes rattle like crazy, and I kept worrying something else would give. Did you end up replacing the valve yourself, or did you have to call in a pro? I keep debating if it’s better to just bite the bullet and upgrade all the old stuff at once, but then I worry I’ll just create new problems.