Abacus Plumbing

Abacus Plumbing

Plumbing Contractors

Company Profile

Owner/Key Managers:

Alan O'Neill, CEO

Molly McGuirk, General Manager

George McNeill, Plumbing Manager

Robert Phillips, HVAC Manager
RL Cavanaugh, Electrical Manager

Bill Chan, CFO

Company Message:

When you call Abacus Plumbing, Air Conditioning & Electrical, we will send you a uniformed, state licensed, drug-free, background-checked professional. We will leave you 100% satisfied. I guarantee it! ~ Alan O’Neill, CEO


  • Repair & Installation
  • Faucets, Sinks, Bathtubs
  • Water Heaters
  • Sewer Inspection & Repair
  • Gas Line Repair & Installation
  • Drain Cleaning & Repair
  • Annual Inspections (CLUB)
  • Water Filtration & Purification
  • Water Softeners & Maintenance
  • Video Camera Inspection

Awards & Affilliations:

Angie’s List, Super Service Awards
Accredited Member Houston BBB Since 2003
8-Time Houston BBB Awards for Excellence Winner
3-Time Houston BBB Pinnacle Award Winner
NexStar Network

Credit Cards:

MC Visa Amex Disc. Financing Available O.A.C. Call for details.


Up to 10 years parts and labor

Gold Standards

  • Workers Comp. Insurance
  • Liability Insurance
  • State License No. MPL 20628
  • Current Complaint File
  • Business Practices

Consumer Comments

Consumer Comments

K.W. - We had a leak in the wall between the kitchen and the dining room. I called Abacus and they sent a plumber, Gregg, within the hour. Gregg worked tirelessly troubleshooting the leak to determine from whence it came. This process took a couple of days but he managed to determine it was a blocked and damaged AC drain that was causing water to back up and come up through a tiny hole in the foundation. He brainstormed and, instead of tearing up the foundation or our atrium to tunnel under, he simply rerouted the drain line from the roof area to the outside of the house. What a great guy and a great company! Love Abacus and would highly recommend them. We have used them for plumbing, electrical and AC.

Project Gallery

Service Details & Tips

Abacus Plumbing

Abacus Plumbing

Abacus is a family owned and operated plumbing company. They have been replacing and repairing plumbing for over 11 years. Starting out as a plumbing company, they have grown to become of the biggest home service providers.

Plumbing Services

Abacus provides fast, reliable plumbing repair. They offer 24 hour emergency plumbing repair services in case of a burst pipe or heavy leak. Whether you need to repair old pipes or install a new water heater, Abacus has the right technicians to get the job done. Plumbing services they provide include:

  • Tankless and traditional water heater installation
  • Gas Lines
  • Drain Cleaning
  • Drain and sewer cleaning
  • Water softeners and filtration
  • Re-piping services

Water Heater Installation

Do you need water heater installation in your home? Abacus Plumbing has been installing both traditional and tankless water heater for both home and commercial properties for over 11 years. They can help you decide which type and model of water heater best suits your home. Some selections you may consider when choosing a new water heater include:

  • What are the most popular brands and their breakdown frequency
  • Choosing a gas or electrical water heater
  • Deciding between a tankless and traditional water heater
  • Whether your home is set up for an electrical or gas heater
  • What the cost efficiency of a new water heater unit is

These questions aren’t always easy to answer and having a plumbing expert to guide you can be very supportive to most homeowners. Having hot running water throughout your home is an incredible thing to have. Our recommended plumbers at Abacus can help get a new unit installed in your home today!

Drain Cleaning

Do you have a clog in your bathroom or kitchen drain? Our gold standard plumbers have been unclogging drains and keeping customers happy for years. There are usually many methods to clearing a drain; you want to make sure you have the best options for your home. Drains can become clogged over time due to various types of debris that come from your home bathroom or kitchen sink. Bathtub drains can become clogged with hair and grease over many years of use. Our plumbers are trained and equipped with the specific tools needed to unclog a drain properly.

Abacus Gold Standard Rating

To be included on our recommended list of plumbing and ac contractors, Abacus has had to pass several standards of quality. We make sure that their plumbers are certified, trained, and insured for their protection and yours. Among the many qualifications we look at include:

  • Years in business as an air conditioning and plumbing repair company
  • Current complaint files
  • Over thousands of homeowner interviews
  • Insurance and licensing of their contractors