Mercy Plumbing
Company Overview
We at Mercy Plumbing are committed to providing diverse plumbing services in Katy. Our team of plumbers brings close to 20 years of experience to the Katy community. Whatever your plumbing requirements, trust Mercy Plumbing for effective results.
In Katy, Richmond, and adjacent areas, our professional plumbers are the go-to for dependable service. We respond to your call promptly, regardless of the hour—our emergency plumbing services are available 24/7.
Your trusted plumbing experts in Katy know that plumbing troubles are the last thing any Katy homeowner wishes to encounter. We at Mercy Plumbing understand the anxiety these problems can create! This is why we aim to ensure your plumbing repairs and installations are seamless. As soon as you contact us, you’ll understand our motto: “We’re Merciful regarding your plumbing needs.” We are committed to maintaining the safety and comfort of your home. We’ve got you covered for plumbing estimates, troubleshooting, replacements, or repairs.
Understanding the importance of keeping your plumbing functioning well, we stand by our work with a guarantee. Master plumber John Lohse built his plumbing career and expertise while working for Houston's leading plumbing companies. Through his experience, John discovered what it takes to thrive as a plumbing company in the third-largest city in the nation. Ironically, John achieved recognition as a leading and award-winning plumber without any formal sales education. During this time, John uncovered his distinctive, God-given essence that surpasses plumbing, built on mercy and compassion.
A particularly frightening day for me was when I had no idea what Mercy Plumbing would become. I can still picture myself backing out of my driveway, driving through the neighborhood, uncertain of where my first customer would be. Today, I am filled with gratitude for our loyal customers who chose to trust Mercy Plumbing.
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line repair
- Hot water recirculation pump installation
- Hot water recirculation pump 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

Last Saturday, I noticed a large amount of water that appeared on our foundation slab. As we have not needed a plumber since moving fairly recently to this area, I was concerned that we choose a good company to handle this emergency. I was of course also concerned about what a weekend service call would cost.
I looked at recommendations on the NextDoor App, and decided to call Mercy Plumbing. John was quite responsive and came quickly to assess the situation. It was a leak from our refrigerator. He replaced the line, and the Saturday service charge was reasonable.
After we dried out the area behind our refrigerator and got the refrigerator moved back into place, we were not getting water from the front of the door. As the refrigerator was heavier than we were able to pull out, I texted John and he came back out at no charge. It turns out that we had crimped the new line when pushing the refrigerator back into place.
I was impressed with the initial service call, as well as the great customer service shown in the follow-up. I was prepared to pay another service call. I was surprised and pleased to have him not charge, especially since it was inadvertently our fault. I will definitely be using Mercy Plumbing whenever needed in the future, and I definitely recommend the company.

Awesome guys! We had just returned from vacation, and discovered we had no hot water. John and his nephew came out promptly, quoted a price, then left to get the needed parts. Fair price, great sense of humor, and quick work. Would highly recommend.

John and his crew did a great job. Had a pipe break in ground by garage! Nice guys!! Will be using them again for sure!

Had an issue with main water line leaking and causing a mess!! John was able to come out same day to assess the problem, give a fair quote, and started working right away!! He even referred me to a good water restoration company to help the rebuilding process,.!! He was real easy to talk with and down to earth! I felt he gave excellent customer service and would use him again for my plumbing needs!

My bathroom was flooding over the holiday weekend and the owner of mercy plumbing came over within 30 minutes of calling. Fixed the base of the toilet and replaced a part in an hour. Very friendly and trustworthy experience.
The part that was replaced was faulty and my toilet continued to drain (at least without flooding) and they sent someone to replace it free of charge. Overall great experience.

Same day service! Great job! When the water line to my house broke I was stuck without any water. Mercy Plumbing was the only service I called who didn't ask me to wait a few days and was able to have someone to my house in a couple hours. My water was back on within 2 hours of their arrival and the price was definitely affordable. I would definitely recommend Mercy Plumbing.

AVOID AVOID AVOID - RUDE
The owner is rude. Plumber charged $250 for a sink that was not fixed and would not warranty his work.
Very unprofessional yells at customer despite me being patient with him trying to explain a problem with his plumber.
I won't use again.

Highly recommend John at Mercy Plumbing and will only use his company for any job at our house.
I called John at Mercy Plumbing to diagnose a possible leak under our foundation. He examined the water supply system, did a hydrostat leak test of our sewer system, and was able to eliminate our plumbing as the cause (the vapor barrier under the wood floor failed and was letting ground moisture through). He also tightened up a faucet and diagnosed a couple of other small issues for me while he was here for no extra charge while waiting for the hydro.
He's a Texas licensed master plumber, bonded and insured, has an excellent BBB history, and outstanding reviews across all forums. I thoroughly checked out the company and his information before hiring him (I've learned my lesson the hard way after using lessor contractors in the past!).
John is honest. Shows up on time. Tells you the price prior to doing the work. Cleans up after his work area inside and out. Explains what he's doing or what problem he's found. Charges a very fair and competitive rate (far less than many). Does not charge a standard call-out or travel fee (at least not to Energy Corridor area).
I'll never use a different plumber. John is the best I've found in Houston.

I had a plumbing leak in my attic and called John after another plumbing company never returned my calls. John fit me in by the end of the day and fixed my leak within 45 minutes. Pricing was reasonable and John was a pleasure to deal with. I would highly recommend Mercy Plumbing and will use John for my future needs!

My husband and I have lived in our home for 30 years, and in all that time have relied on one of the Big Name Plumbing companies. This time, when our 6-year old water heater nearly leaked through a ceiling, we decided to turn to Mercy Plumbing, and it was life changing.
We called John at 7 AM (so sorry!) on a Saturday morning, and he was at our front door with a replacement water heater by 11. He had called us to let us know that simply replacing the control box would do the job, but knowing that this model's boxes were prone to failure, we opted for a new brand and new machine.
John is knowledgeable, energetic and swift. In two hours we had a faulty machine out of our home, plus a leaking exterior faucet that two different Big Name plumbers told us was impossible to repair working like new.
We will never go anywhere else, and I only regret not making the switch sooner. This is the best plumbing service in town.
Sincerely,
Kathleen McKeague
Travis Posey
Missouri City
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