Good Guy Backflow
Company Overview
Fast, reliable, less than 30-minute backflow prevention inspection with on-the-spot appointments. Licensed backflow assembly inspection, assessment and repairs. Authorized, protected, and guaranteed.
Schedule a backflow prevention service with round-the-clock protected online scheduling at goodguybackflow.com/appointments.
At Good Guy Backflow, we are a trusted name in backflow prevention -- Certified Backflow Inspection and Repair, based in Seattle and covering King, Pierce, and Snohomish counties. We are dedicated on maintaining your drinking water secure and uncontaminated, and committed to providing you with the highest quality assistance at a fair value.
Our team consists of Licensed Backflow Prevention Device Technicians with over two decades experience in backflow prevention repair, repair and customer service. Certified, Protected, and Covered.
Arrange a backflow appointment with round-the-clock protected web-based scheduling at our website.
Business Services
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
Business Location & Hours
Mon: | 8:00 AM - 6:00 PM |
Tue: | 8:00 AM - 6:00 PM |
Wed: | 8:00 AM - 6:00 PM |
Thu: | 8:00 AM - 6:00 PM |
Fri: | 7:00 AM - 4:00 PM |
Sat: | 10:00 AM - 2:00 PM |
Sun: | Closed |
Recommended Customer Reviews

Mac just came to my house and checked out my parents house. He is a wonderful person, I feel comfortable having him around me and the fam. Nice guy. I will recommend him to anyone.

Many backflow technicians only check but Mac cans diagnose and actually fix the issue. Prompt, professional, and friendly service

Overall I think responsiveness, timeliness, and completeness there were nothing wrong at all. I rarely 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!
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!

Sure there were already six perfect reviews. Just thought I'd add a seventh. Scheduled my appointment online. Got email reminders. Guy came as promised. Took fifteen minutes. Was personable, professional and Bam, done. Last year we went with someone else. 3X the price and 1/3 the service. Good Guy will get my service every year.

Easy peasy. Love the simple, clean, on-line scheduling. And voila, Mac at the door on time, quick, nice guy and had an emailed copy of the registration sent into the city of Seattle that afternoon. (Last company didn't/wouldn't send in registration and we had to have it done a second time.)
See you next year Mac.

Mac arrived on time (I appreciate the early morning appointment option), completed work quickly and submitted report to city for me. Will use again next year.

As a owner of a plumbing company I recommend good guy backflow. Prompt with all 3 times I have used the company. Great communication, price, and professionalism around my customers.

This is my first time doing backflow test as requested by the city. The communication was very quick and efficient. And the technician, Mac, was very nice and friendly! Mac has responded to my email in an hour and came to my house on the same day! He gave me the best quote and handled all the documents for me as well. Great to work with.

Mac has been testing our Backflow prevention assemblies for the past few years. He provides excellent service, scheduling is a breeze, he has email and text appointment reminders, and he is always on-time and efficient. He then takes care of all the paperwork and submits the test results to the city. Highly recommended!! Yes, he is a ""Good Guy""!!