New Construction Plumbers in Mercer island, WA

"Professional from beginning to end. Everything was completed exactly as promised."

"Nathan was awesome. He took the time to make sure the job got done correctly and he made the whole experience easy. I will definitely hire them again and will be sharing his info with all my family neighbors and friends"

"Mark was great. Very knowledgeable and willing to endure my persistent questions. Installation was quick no mess and works perfectly."

About us: "Knockout Plumbing & Mechanical LLC is a local Seattle based company. Knockout strives to leave their clients with peace of mind when each job is said and done. From hydro jetting and sewer repair to remodels/new construction we knock it out. We look forward to hearing from you, so please never hesitate to reach out."

About us: "Cahill's Plumbing & Heating has served the greater Maple Valley, WA area for more than 30 years and is setting new industry standards for plumbing. Our company provides every new and existing client honesty, value and high quality services. Our staff of experienced plumbers and heating contractors works hard to surpass your expectations with both materials and labor. We don't use the "flat-rate" gimmick, but provide prompt, honest service. All work is done by knowledgeable plumbers who are trained to use the best tools available. Our plumbing and heating services include: • All plumbing repairs • Grease trap repair and installation • 24-hour service • Hot water tank and boiler sales • Compressed air piping • Drain cleaning and repair At Cahill's Plumbing & Heating, we use American Standard, Moen, Kohler, Delta and Grohe to complete plumbing repairs and installations. You can depend on us to complete all projects efficiently and on time. We are licensed and insured, and your satisfaction is guaranteed. Call Cahill's Plumbing & Heating today for your next service call and see how we're setting the industry standard for honesty, value and service!"

About us: "2 Sons Plumbing is a full-service plumbing and sewer company serving the greater Seattle area. Known for reliable service, honest recommendations, and quality workmanship, our team handles everything from everyday plumbing repairs to complex sewer solutions—helping homeowners keep their systems running smoothly year-round."

"They quickly identified the issue and ended up identifying a second related problem that they also resolved within days."

"Derek was very knowledgeable, respectful, and pleasant. He quoted us prices to install a new faucet and/or to repair the faucet."

"Did a great job. The project was done in 30 mins."