VALVE REPLACEMENT PLUMBING IN SEATTLE

Main shut-off & fixture valve replacement done right

Same-day appointments · ★★★★★ 5-Star Google Reviews
Licensed • Bonded • Insured • Residential & Commercial

Call us now for any and all plumbing needs!

Reliable Valve Replacement & Plumbing Services in Seattle

At Knockout Plumbing & Mechanical, we specialize in replacing worn-out or faulty valves that control your home’s water flow. Whether it’s a leaking shut-off valve, a stuck main water valve, or outdated pressure regulators, our Seattle plumbers handle each job with care, code compliance, and clean workmanship.

We inspect, repair, and replace valves to ensure your plumbing system runs efficiently and safely. From main water shut-offs to fixture-specific valves, we use high-quality materials and expert techniques that stand the test of time.

OUR VALVE REPLACEMENT SERVICES INCLUDE:

✅ Main Water Shut-Off Valve Replacement
✅ Angle Stops & Supply Line Valve Replacement
✅ Laundry & Hose Bib Valve Replacements
✅ Pressure Reducing Valve (PRV) Installations
✅ Fixture Isolation Valve Installation
✅ Water Heater Valve Replacements
✅ Code-Compliant Materials & Installations

WHY CHOOSE KNOCKOUT PLUMBING FOR VALVE WORK?

We’re a local, family-owned company committed to quality plumbing in Seattle. Whether you’re updating an older home or dealing with a sudden leak, we provide fast response times, fair pricing, and workmanship that passes inspection the first time. Our team ensures each valve replacement is completed cleanly, correctly, and without cutting corners.

FAQ – VALVE REPLACEMENTS

How do I know if I need to replace a valve?

If a valve is leaking, corroded, stuck, or no longer fully shuts off the water, it’s likely time for a replacement.

Can I just tighten a leaking valve instead of replacing it?

Sometimes, yes—but many older valves fail internally. We’ll inspect it first and only recommend replacement if necessary.

Do I need to shut off water to the whole house for valve work?

For some valves, yes. For others, like under-sink shut-offs, we may isolate that section. We’ll walk you through it before we begin.

What type of valves do you install?

We use high-quality, code-approved brass valves and PRVs from trusted brands that meet Seattle plumbing code.

★★★★★ 5-Star Google Reviews
Licensed • Bonded • Insured • Residential & Commercial

    
 
 
       Posted on Google  
    Justin Gerardy 
 
 
 
 Trustindex verifies that the original source of the review is Google. As a restaurant owner in Seattle, I tend to find it infuriating when tradespeople over charge. It’s a real problem in this city. Knockout was fair and fast. Can’t say how much I appreciate it. I’ll be back for sure.
  
 
      Posted on Google  
    Margot Potts 
 
 
 
 Trustindex verifies that the original source of the review is Google. Zack and his crew were able to come within a couple days of calling and resolved my issue within minutes. They were very friendly and generous - highly recommend!
  
 
      Posted on Google  
    Veronica Seifner 
 
 
 
 Trustindex verifies that the original source of the review is Google. Knockout was great to work with - very courteous, responsive, and fair pricing. Zach came out to cap off a gas line for an appliance we switched to electric. The option was to do it from the inside or from the outside and remove the dedicated pipe altogether. Zach gave reasonable pricing (checked with two other companies) and was able to get the job done right away with expertise and professionalism. Knockout will be our top-choice, first-call for any future pluming needs in our home.
  
 
      Posted on Google  
    Mindy Martin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent experience. I was considering replacing my water heater back in the spring and Knockout was one of the companies I shortlisted to talk to. Ultimately I decided to wait on replacement, but Knockout was definitely at the top of my list. When my water heater started leaking the other day, I immediately reached out to Knockout, and they were able to get me scheduled the next day! I was given the choice between Bradford White and AOS. Zach came out and did a fantastic job. Friendly but professional; quick and efficient but thorough. Knockout respected the quote I was given a few months back which was very competitive. I strongly recommend this company!
  
 
      Posted on Google  
    rozap _ 
 
 
 
 Trustindex verifies that the original source of the review is Google. I asked these guys about hydrojetting our old sewer line that would occasionally get clogged. Zach showed up and looked at the situation, and after chatting for a bit he figured I could DIY it so I would know how to do it rather than paying every time it happeened. So he showed me a fitting for my pressure washer I could get, and described what to do. I did all that and it worked great, and I saved $850 that it would have cost, and then I knew how to do it going forward. They didn't even charge me. They're super honest guys with a lot of integrity. Definitely recommend them.
  
 
      Posted on Google  
    Jason Franklin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Colin and his team have completed 2 projects for us and is always very helpful and informative in his diagnosis and explaining his course of action. I highly recommend him and Knock out Plumbing for all your plumbing needs.
  
 
      Posted on Google  
    Michael Johnson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Zach has done a number of plumbing jobs for us over the years ranging from large bathroom additions to smaller repairs, every time they've been top quality. I highly recommend Knockout!
  
 
      Posted on Google  
    Simone 
 
 
 
 Trustindex verifies that the original source of the review is Google. Zach is a consummate professional. He was thorough, timely, efficient, personable, and diligent. He returned the next day after the job to place a cover on a part, which is something my partner & I wouldn’t have known. Clearly, he has integrity, which in my book is paramount. We emphatically would not recommend anyone else, but him and his team for plumbing jobs. We were beyond pleased with Zach’s skill and caliber. 20/10 ⭐️
  
 
      Posted on Google  
    Evan Wiederspan 
 
 
 
 Trustindex verifies that the original source of the review is Google. Zack and his crew replaced my kitchen sink drain after it started leaking. I was really happy with the price, and the speed and quality of their work. It was also easy to get a quote and schedule over the phone. I would definitely hire Knockout Plumbing again in the future!

READY TO REPLACE A FAULTY VALVE?

Contact Knockout Plumbing & Mechanical today for expert valve replacements in Seattle and beyond. We’ll get the job done right—the first time.

📞 (206) 858-2211
💻 knockoutplumbingseattle.com/contact