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Why Does My Shower Lose Pressure When a Toilet Flushes?

You’re in the shower, finally enjoying a little peace and quiet. The water feels perfect. Then, out of nowhere, someone flushes the toilet and your soothing stream turns into a disappointing trickle. Suddenly, your moment of calm is gone.

Plenty of Everett homeowners deal with showers losing pressure whenever another fixture kicks in. Most of the time, it’s caused by older plumbing that can’t keep up or a weak water pressure regulator that isn’t doing its job. At 2 Sons Plumbing Everett, we’ve helped countless families fix this problem so showers stay strong, no matter what else is running.

Why Showers Lose Pressure After a Toilet Flush

Your plumbing system is like a highway—when too many cars enter at once, traffic slows down. The same thing happens with water. Common causes include:

Older Pipes – Narrow or aging pipes can’t always handle water demand from multiple fixtures.
Failing Pressure Regulator – This device keeps water pressure consistent throughout your home. If it’s weak, the shower will suffer.
Unbalanced Valves – Standard shower valves don’t adjust well when other fixtures turn on, leading to sudden drops in pressure.

The problem is annoying, but it’s not something you have to live with forever.

Things You Can Try on Your Own

If you’re tired of sudden weak showers, here are a few steps you can take:

Stagger water usage – Try not to shower while toilets, dishwashers, or washing machines are running.
Upgrade to a pressure-balancing valve – This helps keep your shower steady even when other fixtures are in use.
Check your regulator – If it’s outdated or failing, replacing it can make a big difference.

These small changes may help, but for long-term comfort, professional solutions are often needed.

When It’s Time to Call a Plumber

If pressure drops happen throughout your house—or if nothing you try makes the shower better—it’s time to bring in an expert.

At 2 Sons Plumbing Everett, our licensed plumbers can test your home’s water pressure, inspect your regulator, and recommend the best fix. That might mean installing a new regulator, upgrading your shower valve, or improving your plumbing system.

What It Usually Costs

Pressure regulator replacement: $750–$1,200
Shower valve upgrade: $650–$1,700

While it’s an investment, it’s one that pays off every time you step into the shower.

Get Back to Strong Showers with 2 Sons Plumbing Everett

Your shower should be a place to relax, not a daily reminder of weak water pressure. If the stream fades every time someone flushes the toilet, don’t just put up with it—fix it.

At 2 Sons Plumbing Everett, we’ll find the root of the problem, explain your options clearly, and get your plumbing working the way it should. No more guessing, no more weak showers—just comfort you can count on.

Call us today at (206) 487-1757. With 2 Sons Plumbing Everett, you’ll get expert service, honest advice, and the relief of showers that stay strong and steady, no matter what else is happening in your home.

2 Sons Plumbing, Electrical, Heating & Air

4.9

Based on 3393 reviews

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Maria Kute

23:01 18 Nov 25

Thank you, Bob, for your professional, courteous, and kind service! My downstairs tub was running with high pressure due to some worn out stems. Bob was thorough—but unfortunately our fixtures are quite old, and he didn’t have appropriate replacements available the first day. However, they were able to find the appropriate stems for our tub and fixed the leak right away day 2. I cannot speak highly enough about how grateful I am for the way 2 Sons accommodated my schedule when they needed to return with the appropriate fixtures. The technician was a genuine joy to work with—and I appreciate the quick follow up and turn around. I also appreciate the way Bob walked me through the process and double checked for leaks.

Maria Kute

23:01 18 Nov 25

Evan Rose

16:17 18 Nov 25

We had a great experience. Brandon and Chris were very polite and professional. We had a massive leak under a toilet and they came and fixed it on a Saturday. They were very timely and hardworking. Ethan was another who was also very polite and professional. Pricing was also very manageable for the extent of the problem we had. I would highly recommend.

Evan Rose

16:17 18 Nov 25

YuliyaG

22:06 14 Nov 25

I had a great experience with 2Sons Plumbing. Communication was on point from start to finish. Dave arrived on time, was very friendly, and knowledgeable. He also gave me a helpful heads-up about our heater and offered great advice. I really appreciate the professionalism and will definitely use them again!

YuliyaG

22:06 14 Nov 25

Brandy Przybylak

19:28 05 Nov 25

We really enjoyed our experience with 2 Sons. We had an emergency that had water all over our kitchen and basement. They were able to send someone out later in the evening for us after several other companies either cancelled on us or said they couldn't come until the next day. Our technician/plumber Riley was great to work with - friendly, quick, and effective! They even gave us a call back a few days later to check in on our experience and to answer some extra questions we had. Highly recommend!

Brandy Przybylak

19:28 05 Nov 25

Carol Wong

19:21 04 Nov 25

I have not decided to go with 2 Sons for the plumbing issues I have yet. However, I am very impressed by the technician, Guy, who came for the appointment. He was professional, friendly, knowledgeable, courteous, and thorough. I told him that I was just getting a quote and not ready to commit to do the repair right away. He was very understanding. I have a clogged kitchen sink, disconnected washer hose causing water damage, and likely a disconnected pipe behind the wall. He explained the steps I need to take before he can help for all three issues. Like I should hire the restoration company to repair the water damage before reconnecting the pipes. He also helped to take pictures and referred me to a restoration company for the jobs outside of his scope. Before he left, he measured the water pressure to make sure the pressure is within a normal range. Just to make sure the water is not putting too much pressure on the fixtures resulting leaks. It was definitely a surprisingly pleasant and thorough experience with Guy.

Carol Wong

19:21 04 Nov 25

Joanne Chan

01:00 31 Oct 25

Excellent service from 2 Sons Plumbing – highly recommended!

We recently had 2 Sons Plumbing come out to fix several issues at our place. We couldn’t be happier with the results. Marcos and Chris were absolutely fantastic — professional, knowledgeable, and very thorough in their work. Every single job was done with precision and care.

Marcos and Chris took the time to explain what they were doing, answered all our questions patiently, and made sure everything was up to code and functioning perfectly before they left. They worked efficiently, left the area spotless.

It’s rare to find such reliable, honest, and detail-oriented professionals these days. I wouldn’t hesitate to recommend them to my friends and neighbors.

Joanne Chan

01:00 31 Oct 25

Jurusha Emerson

16:11 28 Oct 25

I called 2 Sons Plumbing and was able to get them to come out to the house the very next day. The over the phone customer service were very personable and friendly. On the day of my appointment, Bob was the one sent to our house to fix our kitchen faucet. Bob was extremely friendly and helpful in fixing my faucet. He was very considerate and quick with his work. I did not feel like I was being taken advantage of or overpriced as far as how much they were charging. Bob was always transparent with the cost and also trying to find the most cost-effective way to accomplish what needed to get done? I would recommend 2 Sons plumbing to anyone who needs plumbing service. 2 Sons plumbing has a gem for an employee (Bob). If I were to call 2 Sons plumbing again for service, I would definitely want to request Bob as my priority person.
Thankyou so much

Jurusha Emerson

16:11 28 Oct 25

Mackenzie Maynes

02:22 28 Oct 25

After the recent power outage I discovered that my combi-boiler went on the fritz, meaning no hot water and no heat in my home—a very chilly situation for Seattle fall. 2 Son’s was so friendly and able to send out Adam same-day which was a huge relief! Adam quickly assed the issue, fixed it and provided a thorough explanation of what he did to get the system up and running again (which I deeply appreciated). I am thoroughly impressed by his knowledge of these units; turns out the pressure reducing valve on my machine also needs to be replaced, which explains why my water pressure has always been a bit funky between hot and cold. Adam provided an affordable proposal for a future repair to my unit for optimal functioning. Would absolutely recommend Adam and 2 Sons!

Mackenzie Maynes

02:22 28 Oct 25

Amy J

01:15 28 Oct 25

Had a great experience with 2 Sons Plumbing, Heating & Air. Their scheduling system was smooth — I got a call when Carey was assigned, could track his arrival, and everything ran on time. Carey was fantastic! He inspected the garbage disposal, coordinated with my property manager for approval, and quickly installed the new system. He was respectful, efficient, and made sure everything worked perfectly. Really appreciated his help!

Amy J

01:15 28 Oct 25

Oaktree President

22:17 24 Oct 25

Our house decided to replace our own toilet, but we got stuck halfway through because we didn’t have the right tools and accidentally broke an anchor bolt. I called 2 Sons Plumbing, and they showed up within an hour to help us out. Derek, our plumber, was super friendly, explained everything clearly, and got the job done quickly and professionally. Excellent service all around—highly recommend!

Oaktree President

22:17 24 Oct 25