It feels like all the Backflow companies want to just take your money and expect you to trust them to 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! read more

Their technician showed up, presented me with a piece of my equipment that was now broken (wasn't before they arrived) & said he could NOT do the test because it was broken. The company then billed me over $75 for the test that was never performed. No matter how much I argued or what proof I provided they demanded payment. Additionally, I subsequently had to pay another company to fix what they broke and to perform the test. If I could rate them negative 10 I would! read more

Worst company ever. They make you pay upfront and then do not show up, No phone call. Nothing. Don't use this service!!! read more

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

Had them repair a couple spots in my yard. One in the back where I had to call them back 3 times and charged me each time for the same repair. When I had my system winterized by someone else this past winter/2025, they found that another repair they had done at the main box connecting to the cities line had been leaking this whole time explaining my higher water bills this past summer. Horrible service!! read more

Backflows Northwest has been testing my residential backflow device for a few years. Previously, I had used three different testing services over the past 20 years. Backflows Northwest has been the most professional, capable, and responsive of them all, and their service price is reasonable. I recommend this company. R. Hall read more

Backflow northwest has a chaotic scheduling and billing system. I moved to a new home and scheduled a backflow test. When I scheduled the backflow test, they told me to prepay for it and I did. Although I called to confirm the new address the day before the test, the technician went to my old house and surprised the tenant. Even more, 3 months after the test, they emailed me to ask if I have paid for the test or not. I don't know if they have sent my report to the city or not because I didn't get a copy. Definitely won't use their service again! read more

I had a back flow preventer valve installed, as well as some other irrigation system upgrades. I was given a fixed price for the work. The quality of the work was below average and the electrical work of connecting the sprinkler system valves to the control system wiring was flat out defective. When I was invoiced for the work (which was never completed) the price was significantly higher than what I was quoted. The invoice was very crude and lacked any detailed information that would allow for a critical review of the charges. When I asked for detailed information, I was told no. I was given a firm fix price for the work, but then invoiced on a time and materials basis, except that there were no details on the T&M pricing. I don't recommend Backflows Northwest. read more

As I look for a back flow provider I think of this company and how they stopped service to so many on Mercer island the company they bought serviced contracts and cancelled the ones that were with more than one sight. I called the old provider to get a referral as back flows has no referrals to offer. Not a healthy way to do business. read more

We didn't have any issue working with them for the past year where they provided a group backflow testing for our HOA. However this year, they suddenly went MIA. They came out, marked our backflow as failed. I tried reaching out to them multiple times through phone and email for the past couple of weeks where they're just unreachable. Phone doesn't go to a live person and no response to emails. They suddenly just disappeared. read more

Northwest services us for our back flow every year and we just had an issue pop up at the restaurant and they wouldn't even come in to check out the issue. One person told me they were busy at a job site so I called another and he told me the original person I called was next to them at the office. Regardless, they "overnighted" a part that they thought was the issue on Monday that hasn't been in all week. After trying to reach out to them all week as well, I just got a response saying they don't have available parts for 2-3 weeks. I reached out to another company and they came out in an hour and fixed it in 15 minutes. read more

Got back to me in a timely manner. Was very kind to go through the process. Found a time that worked for the technician and me.

Third year in a row these guys have failed to submit a report to my water district. This year I'm being fined $189 for late submittal. The only thing i care about, this company consistently fails at. DO NOT USE THIS COMPANY. THEY TAKE YOUR MONEY AND DO NOT PROVIDE THE CONTRACTED SERVICE. read more

Our small 9 unit HOA has been using Backflows NW for four years and aside from some apparently staffing related communication issues we have been satisfied with their services. Once a couple of service addresses contact information was updated, they came out as scheduled and performed the tests, handled the billing, emailed the results to our members and filed them with the city water department. In our experience BNW services have been comprehensive and their fees reasonable. read more

Steve came today and did the testing. First test did not pass and he came to the door and explained why. He then clean out the gunk and second test passed. Excellent communication and a great company for this service!! Thank you!! read more

Our townhome complex used Backflows Northwest for the past two years, and everything went without a hitch. The office staff helped us turn around the scheduling in a relatively short timeline, as our testing was coming due. They even reached out to the city on our behalf to let them know the testing was scheduled. The technicians were on time, friendly, and worked efficiently. All paperwork submitted to the city shortly after testing was done. Billing was simple, and they billed each unit individually in our group to make things even easier. Overall great experience, and we plan to keep using them in the future. read more

Easy to request the service. Price quoted was accurate! I will use them again and recommend them.

I would leave 0 stars if I could. They took over a local backflow business I had used for years and unfortunately BNW did not have the manpower or skill to manage these new clients. As a property manager I deal with at least 40 different service providers regularly. 99% are fantastic. Backflows NW is by a mile the worst service provider/contractor I have every worked with over 15 years. They can't return calls, promise they will show up and don't, can't fix things properly. All for what should be a very straight forward service. I gave them the benefit of the doubt for a year. I know it's hard to get employees, folks don't show up, front desk isn't always up to speed on issues, etc. Never left a google review before. Steer clear! read more

Backflows northwest tested our water systems and they failed to tighten a backflow adjustment valve screw, leading to dripping water damage over time. I have a written statement from the plumbing company, stating clearly that the water leak was caused by backflow tester not tightening the adjustment valve screw properly during the backflow test. I communicated this to Backflows Northwest and their response was stunning: they tried to question the cause of the leak while acknowledging that there was a leak from the backflow valve in a last ditch effort of trying to weasel out of any liability. At the same time, and in good faith, I had booked them to perform another backflow test, assuming that they would stand by their earlier work and make things right, i.e., reimburse for the water damage repairs caused by their faulty work. However, when asking for a response to the written plumber statement, this company explained that the only person who can reply had suddenly gone on vacation and they are unable to respond. Needless to say, I'd stay away from this company at all costs. read more

Backflows Northwest tested our yard irrigation in Lakewood, and the technician, Corey, was very thorough and professional. All readings were within limits, he updated the inspection placard, and then he left a testing summary for us on the door handle. Backflows Northwest and Lakewood Water District collaborate for this great service and allow me to use automated bi-monthly billing. This gives me the confidence knowing the certification process is complete and, more importantly, knowing our local water supply is safe and free of any harmful elements or toxins. read more

Showed up and finished the job quickly and painlessly. They sent the necessary paperwork to the city for me as well without my asking. Billed online, was easy to pay through credit card. read more

Backflows Northwest helped remove our backflow with ease. We were fortunate to have Seth working on our property who was very friendly and experienced. They also took care of submitting photos to the water district for the backflow removal. All for a reasonable price! Highly recommend :) Thank you! read more

This company is professional, efficient, and priced just right. I would recommend them. Thank you

Just as others said - very quick, efficient and affordable! Showed up quickly to accommodate the city's deadline, tested our backflow and even sent the report to the city! All I had to do was just pay them online. read more

It's been great working with this company. The first time I saw the tech testing my next door neighbors backflow, and asked if he could do mine. He did that, got my email address, and it's been smooth sailing since then. You can schedule and pay online. They follow up each year. Great business to work with. read more

So quick and easy to work with. Very professional and made the process super easy to get our annual required water backflow testing done for our home. Highly recommend. read more

I first contacted Backflows Northwest via their online scheduling system. After a few days with no response I decided to call and schedule. This was 18 days before my testing was due, so I was scheduled for "sometime in the next two weeks." After 14 days of receiving no indication that testing was done, I called and was told that I had been scheduled the previous week but due to an emergency with another customer my testing was not performed. I had not been automatically rescheduled. Since my deadline was approaching, they offered to schedule me ASAP and file an extension with the water company on my behalf. After three days with no evidence of testing, I called the water company and was told no extension had been filed. At this point I called again to cancel my service request. Bottom line, make sure you are given an actual date for service. I was very happy with the ease of scheduling, the fact that I didn't have to be home for testing, and the friendly folks I spoke to over the phone, but lack of follow through is very disappointing. read more

Backflows Northwest is awesome. I want to thank them for taking care of back flow testing that was required by the water company. I truly appreciate the services they provided and how reasonable their rates were. Not only did they do the work on a very short notice, they also took care of forwarding the report to the water department. I highly recommend this company to anyone who is looking for honest, ethical and skilled people to do back flow testing or winterizing their sprinkler system. read more

I received other quotes from other companies but Backflow Northwest response time and price was great. I was able to make an appointment within a day or two. Our technician was Scott R who is awesome. We are new to the area so Scott explained the reason for the test. He was very professional and did not mind answering any of my questions. The testing was really quick. They send the report to the water company as well. So, the only thing I had to do was make an appointment and pay. We will definitely use Backflows Northwest/Scott for our annual testing. I will definitely spread the word to my neighbors since this is a newer neighborhood. Thanks Scott R for great customer service. read more

I always schedule these backflow tests at the last minute, and Backflows Northwest was kind enough to fit me in. The technician texted me half an hour before arriving and got the job done. Billing was seamlessly taken care of online, and the price was competitive. read more

Everything went smoothly and no need to worry about anything because they took care of all things we asked. One email communication then everything was completed on the date what they promised. read more

Kevin came out and retested the backflow and found the problem of the city flushing out their pipes. Fixed it but said it would probably would not pass next year do to the age of the backflow. We decided that we would go ahead and replaced the backflow on Kevin's recommendation. No pressure to replace it, but trusted Kevin's good work and did not want to chance getting someone else next time. Very pleased with the work and good service. read more

Backflows Northwest were timely and super-responsive! And they showed up within the 2-hour window and completed 4-backflow-tests and were finished within 1-hour. We are now on an annual program with them! read more

I've gone thru BN for the last two years, and will continue to do so. Their promptness and ease of service (you're not required to be home) is great for a busy schedule! The first time I wasn't home and they left the results at my door, the second time they came I wasn't feeling well and wasn't disturbed at all, they came, did the test, left results, and that's it! Easier the better when it comes to getting things like this done, especially with a very random schedule. They also have great customer service and work with you to make sure it's done quickly. After dealing with a couple other places that I was less than impressed with I will continue through BN as long as I need backflow testing! Thank you for a great experience! read more

I echo Lucy L. Backflows NW has looked after our annual testing for several years. They contact me (even before I get my notice!) and schedule the inspection. We don't have to be home. They test, record, and submit the paperwork to the city. Done. Very reasonable cost for the service rendered. I won't go away as a customer unless they go away as a service company! read more

Thank you for being customer focused. I love that you send me an invoice and all is taken care of in the background. And then I get a receipt hanging on my door, letting me know that it was all done. I wish there were more companies like you! read more

This is a very professional business. They scheduled quickly, sent Scott who tested and repaired so we could meet the fast approaching City reporting requirement. I am happily signed up with their annual Backflow testing program so I never need to seek another company. read more

Based on a failed test by our annual tester, he recommended that we replace our backflow assembly because of the age of the device. After having another company not show up and chalk it up to a "misunderstanding" about the date, I contacted Backflows Northwest. I spoke with Steven who discussed possible repair or replacement of the assembly. We scheduled an appointment for Tim to come out on Saturday morning of the Memorial Day weekend. Tim arrived at our house promptly before 8 am and after glancing at the device, didn't think it looked that bad. He suggested testing it and it passed! He saved us hundreds of dollars and gave us back several hours in the day. We truly appreciate Tim's honesty and genuine concern for his customers. He is a standup guy and a tremendous asset to the company. We wish all technicians are like Tim! read more

Terribly RUDE and irresponsible company. try to avoid. wish there were 0 stars option. so back in April, it was time to annual back flow test, we scheduled one with them, asked them what they need from us. they told us they will take care of everything, we don't even have to be at home for the test. that's great right? then in may, we got a notice from the city saying we did not finish our back flow test, so I contacted them again, didn't answer the phone. then I contact the city, and was told I had two irrigation and fire sprinkler back flow tests, and the fire sprinklers were not tested. I was confused and called the company again, without giving out any of my info, I asked if they'd take care of everything, the operator said yes, they will take care of everything for $45. then I specifically asked, if they would take care of the irrigation and the fire sprinkler test as well, she assured me again, they will take care of everything for $45. it was Thursday and the deadline from the city was 4pm next Tuesday, so I told her the situation and ask for a test before that, she said she couldn't. well, then I told her to get a supervisor and finally we had an appointment down on Tuesday 10AM. at this point, I was OK because everyone makes mistake right? then it comes to 10AM Tuesday, the technician came to knock my door, I opened the door and he said he's testing the back flow, I said ok and went back to grab my glasses, when I came back out (within 2 minutes), he's gone, without asking what I have and without entering my garage (where the fire sprinkler thing is). hey, I scheduled this test just to test fire sprinklers, and you left without even asking or looking at it? seriously? then I called the company third time, and thankfully the technician came back later in the day. ok I had to stay home for this long, but at least our water won't be shut off. the above is irresponsible part and here comes the rude part. I received a second invoice asking for another $45 for "annual testing of back flow assemble". I thought it must be a mistake because we have paid for the first invoice $45 before they even came back. so I called them, again. and they still asked me to pay for this $45, well, what about "$45 dollars we take care of everything"? guess what, operator defined 'everything' for me, she said, 'everything' means 'everything from trip fee, filing fee, paperwork fee, etc', and irrigation is not in 'everything' for fire sprinkler, and fire sprinkler is not 'everything' to irrigation, and we do this for 'everyone', so I guess we might have a different understanding on 'everyone' right? because I asked couple of my neighbors (same development, same builder, all built within last 12 month), they all finished the test for $45. at this point, the women on the phone was being rude already, won't even let me speak, won't let me finish my sentences. I didn't want to argue on the phone, so I just said, if we come down to business next year, I'll pay $90, but this year, I asked for a quote, you give me $45 without asking how many devices I have, just plain said $45 for everything, it's you mistake, I'll not pay $45. guess what, she said, "if you don't want to pay $45, fine, I'll write it off. but I'll note on your account, bad customer, we will never do business with you again", and she hangs up immediately. yeah, I guess finally we can be on the same page, I will never do business with you too. read more

This company makes people life easier. The back flow test request once set, I don't need to worry as they will take care of everything including sending test result to the City Water District yearly. Needless to say, their service charge is also compatible with others. Highly recommended! read more