VERIFIED THE BEST! The City of Mercer Island sent notice that we needed a backflow test. The notice…read moreincluded a list or 40 companies that were approved by the city. I loaded all 40 of them into my Claude AI program and asked the AI to tell me which one was the best. Which one had the highest ratings and had no bad feedback. It came back stating that 5 Star Backflow was the BEST of the 40 approved companies! I then called Josh, the owner of 5 Star Backflow, and he and his team worked around the clock to help me because I was up against a deadline. His communication with us was spectacular and thanks to him our water did not get cut off. We even had a complication with the backflow valve being broken, but he got it taken care of and he went way above and beyond to help us. I wish I could give him a 100 stars, because he is the real deal and he deserves a great review. If you need a backflow company, 5 Star Backflow is the absolute best! Thank you Josh!

I've been using 5 Star Backflow Services for my required city backflow inspections for years now…read moreand I've always been happy with the service, so it's probably time for a review. Once they had me in their system, they started contacting me in advance to schedule the test each year, which I really appreciate since the city notice doesn't usually give a lot of turnaround time. This year the city surprised me by sending the notice a month early, and I was on vacation when the notice came. This left me with just over a week before it was due. I contacted 5 Star Backflow Services and they were able to do the test just a couple days later. After the test they always send the report directly to the city within 24 hours. I have been very pleased with the service. Thank you!

I was very happy with this company from the office staff to the salesperson and especially the…read moreplumber who installed the new garbage disposal. It works like a charm and I'm so happy with it.

I had a great experience with Ally Plumbing and their technician Donny…read more My tankless water heater which they installed 8 yrs ago was not performing well for either hot water or radiant heating. Donny was extremely thorough in identifying the issue and diagnosed that the unit I had was not the right size for my home. In addition the piping was inefficient and not up to code. They offered to refund the prior install, designed a sleek solution with a new combi boiler and somehow managed to make everything fit perfectly into the very small mechanical room in my home. This was a complicated install made even more challenging by the small space, but Donny's workmanship and problem-solving was excellent. They were able to accommodate my schedule, finished on time and were collaborative with me throughout the process and helped me land on a solution and price that I was satisfied with. My home has never been this comfortably heated in the winter before while not compromising on hot water in the bathroom and kitchen. I highly recommend Donny and Ally Plumbing for quality work and a team that truly cares about doing things the right way.

While the field backflow testing service itself was adequate, the company's back-office operations…read moreare poorly managed and unacceptably disorganized. Their reminder system is not aligned with municipal requirements, and their billing and accounts receivable processes are fundamentally flawed. I was repeatedly told by staff that a prior invoice had not been paid, despite the fact that I retained written confirmation showing the payment was submitted through their Intuit QuickBooks link and acknowledged with a "thank you for your payment" email. Despite providing this documentation, the company unilaterally canceled a scheduled service appointment the day before it was to occur, citing non-payment. When confronted with proof, the explanation shifted to a claim that they "never received the funds from the credit card company," which is not a defensible position to place on a customer after confirming receipt. These outdated business practices, inconsistent internal communication, and lack of basic financial controls introduce unnecessary risk for clients. While I had initially intended to continue using this company, the operational failures and resulting service disruption make them unreliable and difficult to do business with. There are other providers who can deliver the same service with greater professionalism, transparency, and reliability, and I will be pursuing those alternatives going forward.

I don't recommend this company to anyone. I used them for over 7 years for two properties with 5…read moredevices in total. This year due to an emergency situation that I needed to go to hospital, I couldn't keep my appointment. I asked Loren Hanson, the owner, to reschedule the test date for me, he replied by saying 'we don't work for you any longer! Loren has no appreciation of customer royalty.

Reasonably priced irrigation repair & pleasant to work with...will use them again. Always have them…read moredo our back flow testing.

It feels like all the Backflow companies want to just take your money and expect you to trust them…read moreto do the test for you at some point before it's due. Oh, but you have no idea whether that's this week, next month, 4 months from now - who knows! Not Backflows Northwest. I called them to make sure the rates were accurate, and to get an idea of when they would do the test. The guy was super nice, and he said he'd do the test on Wednesday, and they said they'd leave a note on the door when it was completed. They did it a day early, and left the note on the door just like they said. This was exactly the ideal experience in my opinion, so I strongly recommend them!

I cannot say enough good things about this company. I needed a rescue from an unscrupulous…read morecontractor and Jimmy delivered. Rather than assume I needed a valve replacement as the other contractor said, jimmy tested it and found I didn't need one after all. And his price to replace the valve was less expensive, although I didn't need it in the end. I really appreciate how honest and reliable Jimmy was.

Flow Six has conducted our back flow test every year that we have lived in our home. Jimmy and his…read moreteam are very professional and friendly. The process of scheduling and conducting the test with his team is very straightforward. He is proactive in offering insight into other tests that will be required for our sprinkler system and recommending technicians for that service. We plan on continuing to use Flow Six for our annual back flow test and highly recommend then for anyone looking for this service!

Garrett was extremely professional and respectful of my property and home, worked quickly and…read morefocused towards evaluating and fixing my plumbing challenge, was personable and informative, left everything clean, and I felt comfortable with him working on my home "health"! I whole-heartedly recommend Garret and the staff at Salish Plumbing and they will be my Go-To if I need assistance in the future. Kathy P

Fabulous is all I can say! Thank you! Showed up on time, gave instant prices and work was done next…read moreday! Thank you!

When I looked up businesses to fix the water pipe leakage at my Seattle home, this was the company…read moreI decided to contact first - it's a good thing yelp sent my request to other companies as well. The Pipe Doctor responded almost immediately, but that could've been a bot. Their response was slow after that. They said they did not need to physically be at my home to give and estimate - just asked for specific photos. When I sent the photos, they said they will get back to me soon. That was 1/13/26 and never heard back from them. Disappointing.

I have had great service from Tricia in the past, but for some reason this time she failed to show…read moreup on the day she said she would 3 times in a row without sending a message or even responding when I asked if she was still coming. I could have easily got someone else to do the job in the meanwhile but persisted because I liked working with her in the past. I'm not sure what is going on for her at the moment but I would consider the possibility that she may not show up if you need something done soon.

Overall I think responsiveness, timeliness, and completeness there were nothing wrong at all. I…read morerarely cross over outside of reviewing restaurants but This time I had to leave a review. After the work was completed, I was told the report would be sent to the city and I would get an invoice later for the work since there was an additional device that needed to be tested. I of course said ok and thought nothing more of it. Fast forward about a month later. I had already forgotten this issue since I was expecting an email. I get a letter from the city saying my test was incomplete and that my water will be cutoff soon. I called back and was told they had forgot to submit the report and they would do it ASAP. There were no mention of the second device cost so I thought maybe they were going to throw it in for free since there was a lateness. I of course then get an email with the invoice for the additional device and finally a few days later I think I was cc'ed on the report sent to the city. Now, if I had been out or didn't check my mail for a while I really could have my water turned off and I think that even affects my credit? That's not good.

Fantastic Experience!…read more Needed a backflow test completed, as we were late by a week according to the city. Scheduled an appointment with Good Guy for Friday, and then I sent an email asking them to come earlier, if possible. They got back to me in an hour, and confirmed they could make an earlier appointment for me! Super cool service, super easy, and well worth it! I would use Mac again in a heartbeat!

Good service, professional We have used her services for…read moreall our jobs that require backflow testing. She is always responsive and professional. Thank you

Great service and they were able to fit me in within a week. I am very pleased. I will be…read moreutilizing Batgirl each year for my required backflow device testing.

It's the second time that Jafco Plumbing & Sewer did the work at my house. Both times they were…read morevery respectful of property, correct, professional, attentive. Unfortunately, the second project coincided with some serious health problems of one of the members of our family. As a result, I had to postpone the project and then, being overwhelmed, I had difficulty finalizing the paperwork for the financing. They assisted me with all the steps needed until everything was resolved. I could not thank enough the Jafco Plumbing & Sewer team not only for their professionalism but also for their kindness. I highly recommend this company for any project you may need.

First company to respond and come out for an estimate. Dakota was very responsive and easy to…read morecommunicate with. He provided 2 estimates - one with more work to make everything look nicer and one with just the basics. We had other companies come out as well and I inquired about a PRV that another company offered (at MUCH higher quotes) and Dakota worked with me to add the PRV to the basic quote at a great price. Very professional and the team completed everything in 2 days as promised. My highest recommendations!