sump pump and drainage - Knockout Plumbing & Mechanical

Sump Pump & Drainage

Sump pumps, French drains & yard drainage before the next storm

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

Call or text us now for immediate service!

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WATER IN YOUR BASEMENT OR YARD?

Rainy season is here. If your sump pump is struggling, failing or missing altogether, or water is pooling around your foundation, we can fix it before the next storm.

Sump pump installs & replacements for basements & crawl spaces
Battery backup pumps so you’re covered in a power outage
French drains & yard drainage to move water away from your home
Downspout & discharge line routing
Licensed, bonded & insured, with upfront pricing

Water coming in now? Call or text (206) 858-2211

Sump Pump installations & Outdoor Drainage Solutions in Seattle

Looking for something specific?
✅ Sump Pump Installation & Replacement
✅ Outdoor Drainage Systems

Heavy rains and soggy soil are a regular part of life in the Seattle area—but they don’t have to lead to water damage. Knockout Plumbing & Mechanical offers expert sump pump installation and outdoor drainage solutions to protect your home from flooding, foundation erosion, and standing water.

Whether you need a sump pump for your basement or a custom-designed drainage system for your yard, we ensure everything is done efficiently and up to code.

Our Services Include:

✅ Sump pump installation & replacement
✅ French drain systems
✅ Yard & surface drainage solutions
✅ Downspout extensions & channel drains
✅ Drainage system repairs & maintenance

Why Choose Knockout Plumbing?

Friendly, local team serving Seattle & the surrounding areas
Licensed, bonded, and insured professionals
Thoughtful, efficient workmanship with fair pricing
Solutions tailored to your specific property & landscape

FAQs About Sump Pumps & Drainage

Q: Do I need a sump pump?
A: If you have a basement or crawl space that collects water during heavy rains, a sump pump can help prevent flooding and water damage.

Q: What’s the best way to fix standing water in my yard?
A: It depends on your landscape. We design drainage systems based on slope, soil type, and runoff patterns to redirect water safely.

Q: How often should sump pumps be maintained or replaced?
A: Annual maintenance is recommended, and most pumps last around 7-10 years depending on use and conditions.

Protect Your Home with the Right Drainage System Ready to stop water from wreaking havoc on your property? Reach out to Knockout Plumbing & Mechanical for sump pump and drainage solutions tailored to your home. Call (206) 858-2211 or click here to schedule online.

    
 
 
       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!
  
 
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    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!