certified company
Based on 646 reviews
Our Certification Process
Best Pick Guarantee
Verified License(s)
Verified General Liability Ins.
7th year as a Best Pick Call
"You can count on us. We believe in being there for our customers, which is why our office is open seven days a week and until 8:00 PM Monday through Friday. We also provide 24/7 service to all of our customers."

Alan O'Neill | CEO
Company Information
Services Offered
Abacus provides plumbing repair, installation, and inspection for water heaters, tankless water heaters, water softeners, water filtration and treatment systems, sinks, toilets, fixtures, garbage disposals, and gas lines. Abacus offers repiping, annual plumbing inspections, and slab leak detection as well as drain and sewer cleaning, repair, and replacement.
Services Not Offered
Abacus does not offer septic system work.
The company offers a 100 percent customer satisfaction guarantee.
Company History
Abacus was founded in 2003. CEO Alan O'Neill has 39 years of plumbing experience.
Abacus was awarded the Best of Readers' Choice Award by Living Magazine.
Employee Information
Employees wear uniforms, drive marked vehicles, and undergo background checks and drug testing.
Areas Served
West Houston Suburbs, North Houston Suburbs, Fort Bend County & Southwest Houston, The Heights/Midtown
A selection of 646 homeowner reviews:
“Abacus Plumbing did a great job for our office. Wayne, the technician who served us, was very pleasant, thorough, and kind. When I explained what I wanted to install, he was knowledgeable and even offered suggestions. In the future, I will call Abacus for any projects or repair I need—A+.”
“Best customer service I have ever received from a plumbing company. We will never use anyone else. After one service call, we became lifetime customers—A+.”
“Excellent service provided by extremely professional technicians—A+.”
“Abacus employees have been 100 percent professional and courteous. It might seem like a small thing, but I appreciated their use of disposable shoe covers while walking on my new carpet.”
“Courteous, on time, competent.”
“Great Service and a good value.”
“We are well pleased with the work that Abacus has done for us and plan to stay with them whenever any wok is needed around our home.”
“The service provided was very good. The plumber sent was courteous and knowledgeable.”
“I was satisfied with the work that Abacus Plumbing did. They were nice and Friendly.”
“We were very happy with the service we received from Abacus Plumbing. They were very professional.”