Mercy Plumbing
Company Overview
Mercy Plumbing takes pride in delivering thorough plumbing services across Katy. With nearly 20 years of experience, our plumbers have been serving the community. For any plumbing service you require, reach out to Mercy Plumbing for excellence.
Residents in Katy, Richmond, and nearby regions count on our professional plumbers for expert service. No matter the time, we answer your call swiftly—our emergency plumbing services are at your disposal 24 hours a day, 7 days a week.
Your dependable plumbers in Katy understand that plumbing issues are the last thing any homeowner wants to face. We at Mercy Plumbing understand the anxiety these problems can create! Thus, we work to make your plumbing repairs and installations trouble-free. From the moment you reach out, you’ll see why we say, “We’re Merciful when it comes to your plumbing needs.” We genuinely care about keeping your home safe and comfortable. We’ve got you covered for plumbing estimates, troubleshooting, replacements, or repairs.
We know how crucial it is to keep your plumbing in working shape, so we guarantee all our services. Master plumber John Lohse honed his plumbing skills and expertise at some of Houston's most reputable plumbing companies. John gained firsthand experience in what it takes to be a successful plumbing company in the third-largest city in the U.S. Ironically, John achieved recognition as a leading and award-winning plumber without any formal sales education. 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 remember pulling out of my driveway and cruising down the streets, not knowing where my first customer would come from. 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

Looked to set up appointment but read some of the reviews and I am glad I did not. Actually I did but after got call from the owner to clear what was the problem it was obviously he is rude person and company itself is just looking how to take your money. They asked for $125 for just a finding the leak in case I decide to fix it by myself. Well, I said I know where leak is since I can see it and I don't want you charge $125 my card even before you come to my house. Since I was able to explain exactly what work needs to be done I was quoted $450 as a minimum charge. I did make a comment that price seems to be high (even it is how much all similar rip off companies charge for similar repair) but respond from the guy on the phone (owner) was absolutely unprofessional and I can say rude. He said something like ... there are stores that selling shovels so you can dig it by yourself. Well I did. Fixed simple problem spending less then 10% of money that I was quoted as a minimum charge. Decided to do it by myself even I found other real plumber that quoted me $120 for same work. This company, same as other similar "big" companies charge to much and I feel sorry for people like our senior citizens who are not able or not skilled enough for DIY repairs. This company and owner will not have mercy. If you can somehow avoid them and look for some decent handyman in your neighborhood that will be way to go.

John & his associate came out to inspect and repair my water heater. Although I had some standing water in the emergency pan he was able to quickly find out that the water came from the roof and not the water heater itself. He relit the pilot light, did some service work and was finished in about 15 minutes. He didn't try and take advantage of me when I thought the situation was much worse.
He also fixed a couple of my sink poppers that weren't working at no charge. He is an honest guy who also was kind enough to give some goodwill. His prices were much lower than others, but I would have been willing to pay the same as other large companies quotes to have him perform the service work.
I highly recommend his company and plan to use him for all plumbing issues.

Great service! Mercy Plumbing is affordable and efficient. They fixed our toilet in less than 45 minutes. I recommend them to anyone who wants personal and reliable service.

Great company...The owner "John" and his son came to my home Saturday morning they were pleasant, professional, affordable and got the job done quick!The prices are good...I was VERY pleased.

If you like dealing with incompetent people call them. The guy that came out quoted me $375. I said that's too much. He said how about $275? I reluctantly agreed but then got him to change the pee trap and check some other things for no extra charge. Very nice young man but I think he's been taught to see what you think the customer will pay which is why they won't give a quote over the phone.
I started to write him a check he said we don't take checks. I said well they should have told me that when I set up the appointment. He ended up taking the check.
That was the middle of May.
I called several times to extremely incompetent office workers to find out why they hadn't cashed my check. No one knew. Was told the owners wife would call me. She did and assured me she had my check and would go to the bank the next week. That was the first part of June.
The owner called me September 25 to say he had just found my check in the back of his desk and wanted to know if it was still good to cash.
I hung up on him!

Wonderful experience with John (owner) and Jonah (apprentice ) at Mercy Plumbing! Very professional, fair, and efficient. They addressed the main reason for my call and corrected an additional problem that I had been told by three previous plumbers "couldn't be fixed/was a result of the design of the home".....at NO additional charge! Very thankful for their service and will call on Mercy in the future.

I have used them in the past and had good prior experiences. They are fast to respond, friendly, and local. However today they over charged me. I needed 3 valves under my sink that had corroded and needed to be replaced. They charged me $750 for this simple one hour repair. Yelp has a $20 off coupon that I tried to use and they would NOT honor the Yelp check in coupon!!! They told me due to COVID-19 it wasn't valid. I will shop around for another plumber next time one is needed

I feel like he tried to take advantage of me because I'm a woman who knows nothing about plumbing! He came out and used his camera to find the problem ($350) then he said our only way to fix it was to dig it up and replace the pipes($1400)! I paid him the $350, but got a 2nd opinion and the 2nd guy came out and fixed the problem for $180! He also mentioned one pipe needed to be replaced because it had shifted and it didn't need to be all completely dug upand replaced! He said he would do it for $420 for everything!!!! I feel like the 2nd plumber did a great job and it was not half ass or anything!
Don't chose Mercy Plumbing unless you just want to waste time and money!!

Excellent timing. Knowledgeable. Skilled. Jerome was wonderful. Without being pushy, he answered all our questions to a tee. He replaced our broken toilet w/ a new one. It flushes so quietly.

Finally a plumber you can trust.
After calling several plumbers I called John at mercy plumbing who was the only person who didn't try to swindle or take advantage of my situation.
I had a gas valve leak & every other plumber I called was dishonest, including some listed here that have good reviews.
John &his assistant went above and beyond, they took time to explain the problem & gave me choices on how to fix the problem.
I am a happy customer. I would recommend mercy plumbing 100% & certified too!!!