Found Axis through Yelp and per the reviews they were spot on. The owner was extremely responsive…read moreand I never had to follow up. He showed up on time and as promised per his email. He submitted my back flow testing papers and confirmed via email. He didn't charge for travel time (which other businesses did which I thought was odd). This guy seemed honest and very fair prices. Highly recommend.

Highly recommend! Efficient, fast and reliable!! Glad we chose Axis for our backs flow testing!read more

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.

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!

Been using 5 Star for few years for winterization of our irrigation system as well as the backflow…read moretesting. They're very courteous and responsive to communication. Their fees are competitive as well. Highly recommended.

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!

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!

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!

I have used A+ Backflow for probably 10 years. Very nice and dependable. Highly recommend.read more

Seattle and other cities require annual backflow tests to ensure that boilers used for radiator…read moreheat don't allow dirty water from the heater circuit to flow back into the domestic water supply. Previously we had the testing done through the company that installed our gas boiler (Northwest Mechanical) but they decided to focus on the installation business and referred me to A+ Backflow. Initially there weren't any reviews for the business so I contacted Pops Backflow, but Pops was all booked up and referred me to A+ Backflow saying "Dave is very good and always shows up for his appointments. He has all his ducks in a row in regards to insurance, licensing, bonds, etc. He is honest and does everything by the book. I got him connected with NW and they have told me their customers are very happy with his service, I'm sure you will be too." Dave Kuca at A+ Backflow responded promptly to my call and was able to fit me in with short notice so I could meet the city's deadline. He did a great job and accepts credit cards with a Square reader.

They are professional and easy to work & comminate with, and always complete the job timely.read more

I haven't used another backflow service, but I can't imagine anyone could top Terry's service. Been…read moreusing her for 10yrs. If I follow her around & she explains what she's doing. She explained in detail: allowing mole mounds inside valve boxes causes corrosion of the valves which means they malfunction & need to be replaced -- keep moles out by brick bottom & sealed holes. If a part is bad, she has the replacement. When she's done, your sprinkler valves are set for the season.

Craig was good for a number of years for me for my backflow testing…read more This year I get the usual email stating I should schedule a test from Craig. I request a schedule with Craig. Craig sends me an email saying he can come Saturday. I tell Craig that is fine so long as he does not need my input if anything is wrong. Craig can always come later if he is unable to navigate the property properly. I receive an email saying he doesn't want to come down so far south (He is Lake Stevens, I am Woodway; I have many employees who commute that far daily without issue) so he will raise the price. Okay, no issue, but you did invite me to schedule a test, automated or not. Craig has an issue with the test (no water to the assembly, oops, the input valve is right next to the backflow assembly as he has been shown in years past). I receive no text, no phone call, only an email saying he has an issue after the fact. I call Craig to figure out the issue approximately an hour later. Sorry, this was 4th of July weekend and I had many guests over. He tells me he "wasted" his time coming and will not return. A lot of attitude in the response. I did not need to call to discuss it but I did out of professional etiquette as I understand and appreciate the time commitment, but you also made a professional commitment to me and came despite my unavailability and knowledge of the property. I was really surprised as to the attitude received. If you do not want to come, no problem, don't send me an email inviting me to schedule a test, do not accept a schedule to test on your own and do not get upset when you can't figure it out on your own. Further, have some courtesy in understanding you leave me in limbo with the city given your past commitment to me. I stress that past years have been without issue, but this was purely unprofessional and disappointing.

Craig is very friendly and honest when he does our backflow testing. We had a few things that…read moreneeded to be replaced, and he had the parts on hand and was able to get everything fixed quickly. He is professional and always arrives on time. We highly recommend his services!

August 2025. I had excellent service from Affordable Blackflow Testers. I had a back flow test…read morefail conducted by another provider and was awaiting an estimate for repairs which had taken too long. I called Affordable Backflow Testers and, probably by chance, they had a repair person in the area who was able to address the repair that same afternoon. Upon arrival, Taro was quick to confirm that the preventer had failed. He took apart the BFP, showed me how it had failed (fortunately a simple fix), repaired the device and retested. I received a full report 3 business days later. I was very happy with the firm and will plan to use them next spring.

I've used this company for years because they were responsive and had good rates. But for whatever…read morereason they are no longer answering their phones or answering text messages. So I had to go to another source.