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Why Is Only One Faucet’s Water Pressure Low?

At 2 Sons Plumbing Seattle, we know how irritating it is when one faucet just doesn’t cooperate. You turn the handle, expecting a good strong flow, and instead you get a weak little trickle. You stand there, waiting, maybe tapping the handle or turning it off and back on, wondering why this one sink is giving you trouble when every other tap in the house works perfectly.

It’s one of those small annoyances that makes everyday chores feel like more work than they should. The reassuring news? When only one faucet is acting up, it’s almost always something simple, and it can be fixed without much fuss.

Why Just One Faucet Acts Up

When water pressure is low in just one spot, it almost always means something is going on right there at the fixture—not with your entire plumbing system. It could be:

Clogged aerator – The tiny screen on the end of the faucet collects minerals and debris over time. Once it clogs, the water slows to a weak trickle.
Worn or dirty cartridge – Inside many faucets, the cartridge controls how water flows. If it’s gunked up with sediment or has worn down, pressure at that faucet drops.

Simple Fixes You Can Try Yourself

If you’re handy with small household tasks, here are a couple of things you can check before calling in a pro:

Clean the aerator – Unscrew it, soak it in vinegar for an hour to dissolve mineral buildup, rinse it, and screw it back on. You’ll be surprised how often this solves the problem.
Replace the cartridge – If the aerator looks fine but pressure is still low, the cartridge may be the culprit. Replacing it can be trickier, but it’s doable with the right tools—or a plumber can take care of it quickly.

If neither of these fixes does the trick, that’s your signal the issue might be bigger than the faucet itself.

When It Might Be Something Bigger

If more than one faucet has low pressure—or if you notice weak flow throughout the house—the cause could be:

A problem with your main water line
A failing pressure regulator
Corrosion or buildup inside your plumbing system

These aren’t DIY-friendly fixes and need a licensed plumber to get to the bottom of things.

What You Can Expect to Pay

Here’s the good news: when it’s just one faucet, fixing low pressure is usually one of the cheaper plumbing repairs.

DIY fixes – Cleaning or replacing an aerator usually costs $5–$15.
Professional repair – A plumber replacing a cartridge or handling a more stubborn issue typically runs $200–$350.

It’s a small investment compared to the daily frustration of living with a faucet that barely works.

Don’t Settle for a Dribble

At first, a weak faucet doesn’t feel like an emergency. But after a while, it sneaks into every part of your day. It doesn’t have to stay that way. Call 2 Sons Plumbing Seattle at (206) 487-1757, and we’ll take the frustration off your plate.

2 Sons Plumbing, Electrical, Heating & Air

4.9

Based on 3327 reviews

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Victor Garcia

20:12 23 Oct 25

Dave and David came and cleared out a huge clog in my kitchen sink (both sides) that has been plaguing us for a while as well a ton of glass shards that got into the drain when our glass fridge shelf broke. Dave walked us through each step of the process and explained everything which was excellent. He also gave us advice about galvanized piping replacement. They even gave us a few free parts for the sink drain that had eroded away and didn’t charge extra for it!! All around 5 star service!!!

Victor Garcia

20:12 23 Oct 25

Steve P

20:40 21 Oct 25

Fantastic service and communication. Local company. Solved my clogged basement laundry utility sink. Dave and David were courteous, informative, professional and easy to engage with. Scheduling was easy (they came the next day) and they arrived within the expected time window. Transparent pricing and i could also apply a coupon. I will use them again.

Steve P

20:40 21 Oct 25

Ashton Wylde

05:46 21 Oct 25

Great service and Dave their plumber is the best. We have an odd house with even odder plumbing. The pipes are a mess of grandfathered-in open air nonsense, when our pump started making some noises (and a little leaking) after some DIY heat tape adventures (getting ready for colder weather), we were worried that we would need a massive repair but Dave came and looked at it and immediately realized we had unplugged the float plug from the pump plug which was 90% of the problem and the leak just need a little tightening of a flex joint. The company was quick and didn't charge for an estimate or in this case a quick "thats not plugged in right". The experience and the overall professionalism has convinced me that when I do finally need that big repair job, I'll call these guys.

Ashton Wylde

05:46 21 Oct 25

Spencer Charles

05:07 20 Oct 25

Booking an appointment was extremely easy, and we were able to get one just the next day. Communication was excellent with timely reminders and a call before our appointment. Kerry did a fantastic job both advising us and effectively resolving our issue.

Spencer Charles

05:07 20 Oct 25

LuAnn Mitchell

02:38 14 Oct 25

I have all good things to say about 2 Sons Plumbing. My first experience was a few years ago and the whole process went very smoothly. Making the appointment was easy and quick, the repair was done with no problem and I thought the price was fair. Recently, Dave from 2 Sons came out to look at several plumbing problems I was having and, within a matter of minutes, all of the problems were diagnosed. Dave gave me options and estimates all before he left my house. I haven’t had the work done yet but appreciate the information and the prices seemed fair to me. Dave was on time, professional and very knowledgeable. 2 Sons are my go to Plumbers.

LuAnn Mitchell

02:38 14 Oct 25

Kayla Huitt

16:58 13 Oct 25

Bob at 2 Sons Plumbing was amazing! We had a horribly backed up kitchen sink drain and he was able to fix it, and save us some money in the process! He heard what we had to say about our issue and double checked everything. Super friendly and very helpful. Thank you for the amazing work Bob!

Kayla Huitt

16:58 13 Oct 25

Mingmin Zhu

00:31 11 Oct 25

I had great experience with Chase, Riley, Seth, Manu, Nolan with a recent fix. They showed up promptly, transparent about the price upfront, set the expectations right, very professional, got things done perfectly, great communication and very honest and patient to answer all my questions, I will definitely use 2 sons again and will recommend it to my friends and neighbors.

Mingmin Zhu

00:31 11 Oct 25

Arul Menezes

00:41 10 Oct 25

Stellar job by Carey and his team at 2sons today. I had a complex job -- installing a yard hydrant/faucet for a garden across the (private) street. They had to go into the floor of the garage, run piping under the floor, out of the house, across the road. Had to cut into the asphalt, trench down a couple feet, then patch it all up again, including fixing the garage concrete floor. Super job. Looks really clean. Got it all done in a day.

Arul Menezes

00:41 10 Oct 25

First Name

00:04 10 Oct 25

A wonderful experience every time with 2 Sons plumbing. Jake and Angelo helped us with our plumbing issue. They showed up on time and gave a very reasonable estimate for the repair. We ended up replacing a couple of toilets and a part of a sink drain. They came back the next day to complete the work due to our schedule. Excellent communication, prompt, and hard working! Thank you so much Jake and Angelo!! We are very happy with 2 Sons and have used them multiple times.

First Name

00:04 10 Oct 25

Erica G.

00:11 09 Oct 25

Brandon and Ethan were awesome. I had a basic plumbing issue that I was too scared to address myself. They were very non judgmental and provided excellent customer service. I totally recommend 2 Sons Plumbing.

Erica G.

00:11 09 Oct 25