Had a call last week where a homeowner had cranked down a compression fitting under the sink so hard the ferrule actually split. Water was spraying everywhere, and he couldn’t figure out why tightening it more made things worse. People think more muscle means fewer leaks, but with these fittings it’s usually the opposite. I always tell folks—if you’re using a wrench, less is more. If it still leaks, back up and check your cut and alignment first.
Water Pressure Woes—Anyone Else Dealt With This?
That’s wild, but honestly, I’ve been there too. It’s so tempting to just keep cranking down on those fittings, thinking you’re making it watertight, but it’s such a trap. Here’s what I do now (learned the hard way):
1. Always check the pipe is cut clean and straight—no burrs or jagged edges. I use a pipe cutter instead of a hacksaw now, just for that.
2. Slide the ferrule on gently and make sure it sits flat. If it’s even slightly cockeyed, you’re asking for leaks.
3. Hand-tighten first, then give it maybe a half-turn with the wrench. If it still leaks, I back everything off and look for dings or bits of old pipe stuck in there.
4. And honestly, sometimes I just swap out to push-fit connectors if things are really stubborn—less waste and less stress.
I do wonder if water pressure in older homes makes this worse? Sometimes I feel like our 60s-era plumbing just doesn’t play nice with new fittings. Anyway, totally agree: muscle isn’t always the answer... sometimes it’s just patience and double-checking your work.
I do wonder if water pressure in older homes makes this worse? Sometimes I feel like our 60s-era plumbing just doesn’t play nice with new fittings.
Honestly, I hear this a lot, but in my experience, it’s not always the old pipes causing the drama. Sometimes it’s the new “improved” fittings that are a little too clever for their own good. I’ve seen plenty of 60s copper that’s still going strong—meanwhile, some of these modern push-fits seem to have a vendetta against me personally.
- Over-tightening is definitely a classic mistake (been there, snapped that), but under-tightening can be just as sneaky. I’ve had a few jobs where a gentle hand just didn’t cut it—especially with compression fittings on older, slightly out-of-round pipe. Sometimes you really do need to give it a bit more muscle, just not Hulk-level.
- Push-fit connectors are great... until they’re not. I’ve had them pop off in crawlspaces at 2am. If you’re dealing with high pressure or any kind of vibration, I still trust a good old-fashioned solder joint or compression fitting over push-fit. Maybe I’m old school, but I like sleeping through the night.
- About water pressure: high pressure can definitely make leaks worse, but low pressure can be a pain too—especially if you’re trying to test for leaks and nothing shows up until the city cranks up the main at 6am and suddenly your kitchen is Niagara Falls.
One thing I’d add: don’t forget to check for corrosion inside the pipe or fitting. Sometimes it looks fine on the outside but is pitted or rough inside, and no amount of careful tightening will save you from a slow drip.
Anyway, patience is key, but sometimes you gotta know when to bring out the big wrench... or just admit defeat and call it a day before you start inventing new curse words.
You’re definitely not alone in feeling like older plumbing and new fittings don’t always get along. I’ve had my share of “why won’t this just work?” moments with 60s-era pipes, especially when trying to use those newer push-fit connectors. Sometimes it’s a bit of trial and error, and honestly, patience goes a long way. It’s easy to get frustrated, but you’re doing the right thing by paying attention to pressure and corrosion. Even if it feels like a losing battle some days, you’ll get there—just takes a bit of persistence (and maybe a few deep breaths).
Honestly, I’m not convinced patience is always the answer with old pipes. After a couple of minor leaks from “trial and error,” I started thinking it’s safer (and cheaper in the long run) to just swap out sections of old pipe instead of forcing new fittings. Sometimes shortcuts end up costing more—especially when water damage gets involved.
