Abacus
Company Overview
?Dispatch fees are eliminated for first-time Yelp clients? Schedule online with ease? Top-tier Better Business Bureau rating.
Abacus Plumbing was established by Master Plumber Alan O'Neill in 2003 with a singular aim: to win loyal clients through superior service. Due to its commitment to customer satisfaction, Abacus Plumbing has become a top player in Houston and has gained a solid reputation nationwide.
Abacus introduced Air Conditioning & Heating to its service portfolio in February 2012. In its first year, the Air Conditioning & Heating services catered to clients in Houston.
In September 2014, the company incorporated Electrical services into its offerings.
The company has exceeded its goals by delivering exceptional, client-centered service and continues to thrive and excel in the HVAC and Electrical sectors. Now, Houston residents can rely on one company for all their plumbing, HVAC, and Electrical requirements.
Tom Tynan remarks: ""Having known Alan O'Neill for over 20 years, I can confidently say that Abacus outshines every other plumbing company in Houston.""
Since 1977, Alan has been involved in the plumbing industry. Alan's journey started as a plumbing apprentice in Dublin, Ireland. Alan is a licensed Texas Master Plumber. Alan is married to Linda and is a father of three. In his leisure time, Alan enjoys family outings and is a certified scuba diver.
Alan shares, “The soothing nature of the underwater environment is a welcome relief from the hustle and bustle of daily life.” Alan enjoys watching Houston's sports teams, especially the Houston Dynamo.
Business Services
- Bathtub installation
- Bathtub repair
- Circuit breaker installation
- Circuit breaker repair
- Drain installation
- Drain repair
- Electric inspection
- Electric installation or replacement
- Electric panel installation
- Electric panel repair
- Electric repair
- Wire installation
- Wire repair
- Electric vehicle charging station installation
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line repair
- Generator installation
- Generator repair
- HVAC installation or replacement
- HVAC system repair
- HVAC system maintenance
- Light fixture installation
- Light fixture repair
- Outlet installation
- Outlet repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
| Mon: | Open 24 hours |
| Tue: | Open 24 hours |
| Wed: | Open 24 hours |
| Thu: | Open 24 hours |
| Fri: | Open 24 hours |
| Sat: | Open 24 hours |
| Sun: | Open 24 hours |
Recommended Customer Reviews
Abacus plumbing replaced my main sprinkler valve. I bled it for the winter and it was wrapped and insulated by them. in the spring when I went to turn it back on the valve leaked and the pipe to it had shattered. Abacus replaced the pipe, but told me the leaky valve was not covered. So I turned the main valve on and off that summer when I needed to use it. In the fall I again bled the system and shut it off, and again it is wrapped and insulated. This was a fairly mild winter in Houston, so I did not expect any problems. I went to turn it on today and it leaked through the insulation wrapping like crazy. My guess, the inferior pipe materials that they replaced it with again shattered. You can count on them using inferior and or previously used worn out pipe. You cannot count on them to stand by their work. I will never use them again and am telling anyone I meet my story. One last thing, they are not a cheap plumber either.
Prior to the maintenance appointment with Abacus, one of their techs had inspected the HVAC system and a plumbing team had been in the attic. None of these folks recommended any insulation to be added in the attic. After a "maintenance" visit from them, their "Best" recommendation was to have all the attic insulation removed and installed for $18k. No visual documentation of any issues. Recommended square footage was inaccurate. Zero detail regarding the type of insulation or method. They have reached out to multiple times via email and phone to schedule the installation. Proceed with caution if decide to use their services.
Scammers. They tell you need at least 20 times more things done than are really necessary and they charge for estimates. We had a small leak in a wall and bathtub was on other side. The guy went up in the attic and said we needed all the pipes in the attic replaced as they were leaking too. I have been in the attic many times and inspected all pipes for leaks and other issues -- and everything was fine. I had checked in the attic 1 day before Abacus came out as I was checking everything due to small leak in wall. Abacus' quote was $16,000. I paid them cost of estimate something like $60 and showed the Abacus guy the door. I had the leak fixed for $300 total two days later and no leak and it still wasn't leaking 10 years later when we sold the house. There is second time I called Abacus and it was at work as our refrigerator ice maker quit working. SAME THING AGAIN.....
Requested service and received a 4 hour window early in the day. Called the company for updated arrival time and confirm appointment several times through out the day. Yet plumber never showed up, and ticket is canceled with no explanation. When we complained that they didn't show up during the window, the plumber called my property manager directly and started yelling at the property manager then abruptly hangs up. Called dispatch back to understand what is going on and the dispatcher just hangs up. Half hour later we get an automated email that they are on the way to the property. Had to call back again and tell them that we don't want to use a company that hangs up on their customers and yells at them.
Surprise!!! You owe $150 for a service call that earlier in the day you confirmed was covered by your maintenance agreement and warranty on an expensive thermostat replacement just a few months ago. When did you find out??? After the work is completed. (#970760 1/24/2024). And . . . . the fee is made known at the end of repair work that was indeed a result of faulty workmanship six months ago which I reluctantly paid several thousand dollars for. Why such a high cost for the original work??? (#906499 8/25/2023). Because Joseph 8/25/2023 tech said during a 100+ degree heat wave that Abacus would have the send the Lenox parts under warranty in for credit before he could start work. (Lenox Corporate later said this statement was not true). Don't bother calling a manager. They don't return calls. Weeks or sometimes a few months later the customer service calls but in reality they cannot do anything. It seems like you can count on Abacus to charge every customer something even when Abacus says something different in the beginning.
Layla A.Had a breaker go out that caused us to lose power in the living room. Called Abacus to see how much it costs to replace the breaker ...The electrician said that our two breaker panels need to be completely redone because it wasn't wired correctly by the builder, and our house will catch fire if we just replace that bad breaker that went out! He refused to only change the bad breaker out, saying he would be held liable if our house caught fire. He quoted us $20K to redo the breaker panels! And left us without power to our living room, but not without charging us $200 for a "diagnostic fee". I called another electrician immediately for a second opinion. He verified that Abacus was not telling us the truth and he fixed the problem without hesitation. After the stress that Abacus has caused me today, and no less charging me for it as a "diagnostic fee" I will be filing reports on them with various entities for fraudulent business practices. They need to be held accountable...
Hell no. I called them out because I had a faulty temperature sensor on my tankless water heater. That's been working fine up until yesterday. Because I heard them advertise on the 740 a.m. radio I thought they must be good. What a joke.
So I ask him how much the charge was and he said they charge $500 for diagnostic and then another $500 to fix the issue. I told him just forget it man I can buy a brand new tankless water heater for $1100. He then says wait a minute causes boss and says OK I'll do it for 397. But then the guy comes out and never opens the water heater, but starts checking my entire house for code. He spends more time checking my gas meter and then all my appliances and then says you need a high-pressure meter and a regulator at every gas device in my house at $500 each. So
Now we the total is $400
An hour plus $2500 for regulators and we henhasnt even looked at the tankless water heater..!I at this point I asked can you just fix the temperature sensor on the tankless as it's been running fine for
Months. So he calls his boss and says no we make repairs because at this point we have to put everything up to code 1st..
I looked up the issue myself and it's a water temperature sensor that I found at a parts house for $12. I mean at this point I could literally take out the tankless and put a regular water heater back in there for 500 bucks. This place is a money scheme, and they are only coming out to figure out how they can rape you and not fix your issues . This is a warning to everyone do not use abacus plumbing unless you want to be screwed over from the start. They knew what they were doing and that's how they operate to make money..
We called Abacus Plumbing to quote us a price to replace a kitchen faucet. We were given a quote of $495.00. Is this ok?
I called them to. Heck on my HVAC system. I had explained I have one unit with 2 zones and one of the zone is working fine but the other is not. They were quick to take all the information and gave the appointment. I asked is there any charge, I was told no charge to come out. Here I where they get you. They said no charge to come out, once technician was here he said there will be $199 diagnostic charge.
This is unethical. I did not ask him to come and look at my home. I had called them for a specific problem.
Buyer be aware.
Horrible experience. What should have been a VERY simple faucet installation after new countertops and cost $400 ended up costing more than $1000 after refusing several services pushed on us and a refusing a "membership" we didn't want and were pressured to sign up for. Additionally, after paying $1000 for approximately 45 minutes worth of work, the plumber neglected to turn the water to the dishwasher back on and caused problems with our dishwasher. Had to call them the next day to come back and fix what they had "installed." Avoid them and use anyone else.

























