Hard Water Buildup and How to Clean an Aerator
Okay, here's the thing. If your faucet water sputters, sprays sideways, or just comes out weaker than it used to, nine times out of ten it's not the faucet. It's the aerator. That's the little screen tip on the end of your spout, and here in Utah County our water is hard enough that it clogs those things up on a schedule you could set a watch to.
What hard water actually does
Hard water just means it's got a lot of dissolved minerals in it, calcium and magnesium mostly. You can't see them in the glass, but you can absolutely see them once the water evaporates and leaves the minerals behind. That white crusty stuff on your showerhead, the chalky ring in your teakettle, the buildup around your faucet tip. Same culprit every time.
The aerator is a magnet for this because it's the last thing the water passes through before it leaves the pipe, and it's got a screen mesh that's perfect for catching mineral flakes. Over months, that mesh gets narrower and narrower until your water pressure feels like it's dying. It's not dying. It's just clogged.
How to clean it, real quick
You need a pair of channel-lock pliers (or slip-joint pliers, whatever you've got, a DI run will get you a decent pair for a few bucks), an old toothbrush, and white vinegar. That's the whole shopping list.
1. Unscrew the aerator. Look at the very tip of your faucet spout. You'll see a seam where a little cap threads onto the end. Sometimes you can unscrew it by hand. If it's stubborn, wrap it in a rag first so you don't scratch the finish, then use the pliers to turn it counterclockwise.
2. Take it apart and look at the order. Inside you'll find a few pieces stacked up, usually a screen, a little plastic or rubber flow restrictor disc, and a rubber washer. Lay them out on the counter in the order you pulled them, left to right. This matters more than people think. Put them back wrong and you'll get weird spray patterns or no water at all.
3. Soak it. Drop all the pieces in a small bowl of white vinegar. Let it sit for at least twenty minutes. If it's really crusty, go an hour. The vinegar dissolves the mineral deposits without you having to scrub hard.
4. Scrub with the toothbrush. After the soak, brush each piece gently, especially the mesh screen. You should see the holes open back up. Rinse everything under running water.
5. Reassemble in the same order and thread it back on. Hand-tight is plenty. Turn the water on and check your spray pattern. If it's blasting sideways or dribbling weird, you've got a piece flipped or out of order. Take it back apart and try again.
That's it. Fifteen minutes, most of it just waiting on the vinegar to do its job.
My opinion on this one
Patience beats skill here, same as with drywall. The vinegar soak is doing the actual work. If you try to skip the soak and just scrub a crusty screen dry, you'll fight it for twenty minutes and get frustrated. Let the chemistry work first. Don't overthink it, just let it sit.
A word about touching things you don't need to touch
This is where I'll tell on myself a little. My first ever drywall patch, years back, I got impatient waiting for the mud to dry and started sanding way too early and way too aggressive. I sanded right through my own patch. Ended up with a bigger hole than I started with. Learned the hard way that the waiting part is the actual skill, not the sanding part.
Same lesson applies here, just smaller stakes. Don't yank the aerator apart the second it comes out of the vinegar and start scrubbing like you're trying to win a fight with it. Let it soak the full time. Let the mineral deposits soften on their own. Then a light brush does the whole job. If you're aggressive with it you can crack the plastic flow restrictor, and now you've got a $20 replacement part problem instead of a free vinegar problem.
When it's not the aerator
If you clean the aerator and your pressure is still bad, or if it's bad at every faucet in the house at once, that's usually something bigger going on with your pipes or your water heater, and that's outside what a toothbrush and vinegar can fix. Call a plumber for that one. But check the aerator first. It's the cheap, easy answer nine times out of ten, and I'd hate for you to pay someone to do what you could've done at your kitchen sink with stuff already in your pantry.
Before next time
Pull the aerator off one faucet in your house before we meet again, just to see what's going on in there. You might be surprised how crusty it is even if the water still feels fine.