Mercy Plumbing
Company Overview
Mercy Plumbing takes pride in delivering complete plumbing services across Katy. Our team of plumbers brings close to 20 years of experience to the Katy community. Whatever your plumbing requirements, trust Mercy Plumbing for reliable results.
In Katy, Richmond, and adjacent areas, our friendly plumbers are the go-to for expert service. We are here for you at any hour, providing emergency plumbing services around the clock.
Your reliable Katy plumbers 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! That’s why we strive to make your plumbing repairs and installations as easy as possible. From the moment you reach out, you’ll see why we say, “We’re Merciful when it comes to 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 honed his plumbing skills and expertise at some of Houston's most reputable plumbing companies. John learned firsthand what it means to be a competitive plumbing business in the U.S.'s third-largest city. Ironically, John was a consistently top-performing and award-winning plumber without formal sales training. During this time, plumber John discovered his unique, God-given way of being that transcends plumbing—one rooted in mercy and compassion.
A particularly frightening day for me was when I had no idea what Mercy Plumbing would become. I recall backing out of my driveway and driving through the streets, unsure of where my first customer would be. Today, I feel grateful to all our loyal customers who took a chance on 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

Very high price for basic services and they will try to upsell on things you don't want.

New fridge arrived at 10a when we discovered the waterline hookup had no pressure. John and Jonah to the rescue! They arrived WITHIN AN HOUR to help us! This father-son duo was quick to mobilize and found the problem. Professional, kind, and even spent some time explaining to me the mechanics of my kitchen plumbing so I know what to look out for in the future. Honest family business. Thank you, gentlemen!

I had Mercy Plumbing come out to my mom's house today (5/21/2022) and based on the level of service she was provided, she was like "PLEASE leave a glowing review for me!". She says you guys were prompt, courteous, knowledgeable, and so very kind. Thank you so much for providing my mom with the best customer service!

I am new to the Katy area and used Yelp reviews to choose Mercy Plumbing to do some (what seemed to be) fairly simple repairs. Breanna in the office was very friendly and helpful and John, the owner, told us how experienced he is (several times) so we hoped we had found a good service. The pricing seemed quite high but we moved forward hoping for a professional repair. The price was over $1500 for about 2 hours work. The invoice was extremely vague and unclear so I asked for a breakdown, but never got it. Two days after they were here, the toilet in my master bath started doing the same thing that caused me to call a plumber initially. Everyone was on vacation for over a week so we just didn't use that toilet until they got back. When they came back out, they said some part inside the toilet was installed backwards and that's why the toilet didn't work properly. They charged us another $250 to make this repair which it seems they should have found the first time. A few hours later we found that the toilet was leaking. They came back and repaired it the next day but we told them not to come back if there would be any additional charge. The toilet still doesn't work properly (the handle which they replaced sticks in the downward position when flushed) but we are just living with it and will contact a different plumber at a later date. The whole experience was very frustrating.

Could not be happier with this company. This is a family business and John, the owner, is first class all the way. He was here on a Friday even though they were extremely busy and repaired my sink and clog in no time. He also gave me tips on how to keep it clean moving forward. They were reliable, honest and professional. Highly recommend.

Great customer service, was prompt to respond, quick to visit, and reasonable quotes!

Terrible. If you like working with a dictator choose Mercy. The owner accepts no questions about his work and has a haughty attitude if you have real pertinent questions. Pick another company if you want a peaceful exchange regarding your plumbing concerns. Truly the most rude and overbearing person I have ever met.

Our sprinkler pipe was leaking and we needed same day service. They scheduled same day appointment.
John came and he was very helpful.
He was professional and also positive, polite person.
Thanks Mercy Plumbing, especially John!

Mercy Plumbing has been the 4th plumbing company I've called and used since I have moved to Katy in the last year. I will never use a company or service again if I have had a bad experience with them and this applied to the 3 (SAP Services, Lindsay Company, and The Katy Plumbing Company) I've used prior to Mercy Plumbing.
I would definitely recommend Mercy Plumbing to anyone looking for a trustworthy plumber. John helped me today with a gas pipe and was very upfront about it. He offered a very simple solution to me and priced the service more than fair. It definitely saved me money compared to other plumber services I have used.
They were super responsive and communicative through the process as well after I had booked my service appointment. I would get update calls on ETA and confirmation and showed up right at the beginning of the time window. Would definitely use them again!

Never tried their service because they refused to come out to give a quote. Instead quoting several thousand dollars without laying eyes on the project. John spoke with my sister and was very rude, stating"Well if you've had other people come out to look, why isn't it done by now". It's called getting estimates. If this is how you represent yourself to potential customers, I'd hate to see the quality of work.