Verified record
K.O PRO PLUMBING AND HVAC-R is a Wilmington-area plumbing business whose customers describe careful water-heater work and problem solving. In reviews from 2020 and 2021, homeowners said Armando compared options, explained the work, and handled installations and repairs with attention to detail. A 2021 homeowner described Armando replacing a pipe, moving an expansion tank to code, and installing a water-heater shut-off valve after other plumbers had not solved the problem. Other reviews from 2020–2021 praised prompt communication, project updates, testing, fair pricing, and willingness to review the finished work. The written accounts are dated, so ask what services and availability are current before booking. Confirm the exact scope, options, testing, price, and any code-related work for your project. This may suit homeowners seeking plumbing repairs or water-heater installation who value careful explanations. The strongest public detail concerns work completed in 2020–2021; request current references and a written quote for today's job.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from K.O PRO PLUMBING AND HVAC-R. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$290 – $710
Typical plumbing job around $500
Armando installed tanless water heater at our house this month. When I approached him for quotes, he provided various applicable options to choose from explaining each of them thoroughly. He completed the installation and testing properly taking care of every little detail. He is very professional about the quality of work and time etc. I would definitely hire him for any future repair or installation work at my house and also recommend to my friends and family. #qualityofwork #professional
We had a wonderful experience. We contacted Armando about a problem that we had two other plumbers look at with no success, and Armando was able to identify the problem and come up with a great solution that was cost-effective for us as well. He did excellent work, fixed a few other minor things that we had issues with and we could not be any happier with the work that was done. In all, he replaced a pipe, moved our expansion tank so that it was up to code, and installed a shut-off valve for our water heater. Armando was also very easy to get in touch with, was able to work around our schedules, and showed up early (he gave us a call first to make sure it was okay if he came earlier than expected). We highly, highly recommend this company and will likely use them in the future for our plumbing needs. Very professional in all respects and the work was exceptional.
The serviceman Armando exhibited great knowledge and expertise in his ability to performing the job (installing/replacing) my water heater. I was able to single him out from other plumbers after interviewing him and other plumbers. I was 100 percent satisfied after the completion of the project. I've started to refer him to my colleagues. Should they have similar Projects in their homes.
Armando was very professional and very prompt. He kept me updated when there were changes in the project. Offered great tips to things I otherwise would not have known. Always great to have a fellow veteran who shows great dedication to getting the job done and done to the owners satisfaction. He made sure it was okay before any decisions were made. Reviewed his work and stuck around to make sure things were fine. And also a great price. Would definitely hire him again. Liked him so much that I offered his business card to my brother in-law who's a contractor for other potential jobs.
Armando was very professional from start to finish he went through all the items on the quote, he arrived on time and got right to work. Armando took all those extra steps to make sure everything was done correctly. I am very satisfied with the work that was performed and we talked about other jobs that i need to get done. I would hire him again and have no problems referring him to family or friends. #professional #qualityofwork #prideinwhatyoudo
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1 change recorded — last scanned Sep 14, 2026.
Transparent diagnostics5.0
Quoted price holds5.0
Midnight and weekend help5.0
Broad plumbing and HVAC range5.0
Rapid response5.0
Repeat, years-long customers5.0
Master plumber on every job3.8