They arrived on time, explained everything thoroughly. I had a leak that no one else had been able…read moreto find, repaired broken sprinklers and got everything up and running! So, thankful they came. Definitely calling again.

From the owner: With over 25 years of experience, we provide licensed irrigation and backflow repair and…read moreinstallation services, including backflow testing and comprehensive drainage solutions. Specializing in Rainbird, Hunter, and Febco brands, we proudly serve Houston and surrounding areas such as The Woodlands, Spring, Cypress, Katy, Tomball, The Heights, Bellaire, and Pearland.

I've had backflow testing with 4 different companies over 25 years. I have to declare that TP…read moreBackflow Testing Inc. is the BEST EVER!! So mad I didn't find him earlier. Mr. Phan was very timely, efficient, knowledgeable, and responsive. What's more amazing is his price! Wow! Couldn't ask for a more stress-free, wonderful experience. Whenever I see the initials T.P., I used to think of toothpaste (we are a dental office). But now when I see T.P. or TP, I think of Tan Phan! Tan Phan is the Man!! Call him! You won't regret it! (P.S. No, I'm not his friend or related to him in any way)

Always enjoy doing business with Bud. Super easy to work with, reliable, on time, and always gets…read morethe job done. He's been helping me with backflow testing for three years in a row now. No complaints! I plan on continuing his service for future needs. Thanks Bud!

Very nice guy! Tested the backflow and answered all my questions. Will definitely use him again if…read moreneeded.

Great customer service. From scheduling an appointment to actually servicing the backflow. Highly…read morerecommend The Backflow Guy!

From the owner: We take pride in our work and take care of all of our customers!read more

Highly recommend, work was done in a timely manner, very polite and professional , really liked his…read morework I give him 10/10 !!

Had a toilet clogged up quick to come and service and repair the issue 5/5 great pricing and quick…read moreto fix my emergency call.

I would highly recommend Neptali/GCS Backflow Services. Although he was not able to complete the…read morework I needed done, he was thorough, patient, and provided an exhaustive list of solutions and alternatives. He responded to request for quote quickly and was out the next day. I would definitely recommend GCS Backflow!

From the owner: GCS Backflow inspects, repairs and certifies backflow assemblies utilizing experienced, TCEQ…read morelicensed professionals. We provide the following services: new installation certifications, annual compliance re-certifications, and device troubleshooting and repairs. We focus on the certification of backflow prevention devices for homeowners, landscapers, plumbers, builders, and business owners. Proper backflow prevention device testing and maintenance is essential for compliance to regulations as well as avoiding costs incurred due to a faulty backflow device. GCS makes it easy for you to stay compliant. Call today and see why GCS stands for Great Customer Service.

Wow, Darwin and his team were absolutely fantastic! From start to finish, the entire experience was…read moresmooth, professional, and truly above my expectations. He arrived on time for the estimate, communicated clearly, and his crew showed up early and ready to work on the scheduled day. He even improved the irrigation layout to make future maintenance a breeze, which was a huge bonus. The paver patio turned out beautiful. Darwin followed my design perfectly and recommended the ideal stone to ensure it stays solid and stunning for years to come. The craftsmanship really shows. When the job was done, his team cleaned up my yard so well you'd never know major work had been done, except for the amazing new patio of course! Anytime I had questions, Darwin took the time to explain everything thoroughly and made sure we were completely aligned. It's rare to find someone who cares this much about quality and customer experience. I will absolutely hire Darwin again for future projects and highly recommend him to anyone looking for reliable, skilled, and genuinely awesome service. You'll be glad you chose him!

Scammer. If you hired this man go ahead and re-dig the whole thing. The box he put in was not even…read morea whole box for the irrigation. Sent a txt threat for more money. Nope, fired. We have a new crew working on your botched job, have to spend more time and money with this project. We told him not to cover the WEEP HOLES and he told us "is okay for me" like are you serious? He told my fiancé he will not be covering those, he did not even tell us he did. We had to find out for ourselves. The pipes were all crooked and not buried below the foundation. Just a complete liar.