Johnson Plumbing
Company Overview
Since its inception in 1960, Johnson Plumbing has been delivering reliable plumbing solutions for residential and commercial needs. We proudly serve the communities of Merced and Mariposa counties in California. Our offerings include a wide range of plumbing fixtures and products, such as swamp coolers, water heaters, and systems for water purification and softening. Our inventory features products from leading brands such as Kohler, Moen, American Standard, Price Pfister, Delta, Eljer, Chicago Faucets, and Zern. Our expertise lies in the installation and repair of toilets, gas lines, faucets, disposals, and grease traps. We also provide services like video pipe inspection, leak detection, root removal, and replacement. Additionally, Johnson Plumbing handles drain cleaning, maintenance, remodeling, and 24-hour emergency services.
Originally known as Sid Johnson Plumbing from 1960 to 1972, the company rebranded to Johnson Plumbing when Greg Johnson, the current president, joined full-time. In 1981, we incorporated and became Johnson Plumbing, Inc. Our focus was mainly on new construction until 2000, after which we became a service company; we are licensed and bonded for all work related to gas, water, and drains. Scott Johnson, our third-generation team member, will soon be joined by his son Andrew this summer, ushering in the fourth generation. We boast a great team with a lot of expertise! Give us a call today!
Hi, I’m Greg Johnson, owner of Johnson Plumbing, Inc. I grew up in this business, following my dad around since I was five. I naturally gravitated towards it, loving to hold the flashlight and hand him tools and fittings. I even remember my first show-and-tell in first grade was about a thermocouple for a water heater! I began at the bottom as soon as I could; you could say I was a ditch digger, LOL. We didn’t have a backhoe in those days; I was the backhoe! I had no idea they made trenchers until my dad hired one; I thought, why am I digging by hand? I think he was just instilling character in me. He was recognized for being fair and honest; I hope we continue that tradition. He was the hardest worker you could ever meet, and I’m proud to be his son. I went full-time after high school, married a wonderful woman named Sharon Fauver, and we have two boys, each with four kids. We cherish them all. Call us today!
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal installation
- 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
- Septic system cleaning
- Septic system installation
- Septic system repair
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Sump pump installation
- Sump pump 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

Never use Johnson Plumbing under any circumstances! Johnson Plumbing take advantage of elderly people. Johnson Plumbing take advantage of Veterans. I called them out to repair/replace a copper hose running up to my mother's swamp cooler that had been leaking. Instead, they took pictures, stayed for 10 mins and charged my mother $126. They stated that the float was broken and that was the cause of the leak. We changed the float and the swamp cooler still leaked. I called the next morning with the same request, please repair/replace the cooper line due to it leaking. This time I was told the Swamp cooler needed to be replaced and the manger would call me later to discuss the issue. Not only did the manger never call me back, but I called another plumbing company that came out that same day, replaced the cooper line and now the swamp cooler runs perfectly! I gave Johnson Plumbing a chance to redeem themselves and make my mother whole, they were not interested. Johnson Plumbing clearly have no integrity.

Another good experience with Johnson Plumbing. I have a small rental house built in 1926, so everything is old. The tenants are fantastic, and I try to keep them happy. I have been using Johnson for various plumbing repairs for many years. Today it was a moderate leak at the shut-off valve for the service supply line. I emailed Johnson last night after closing, and this morning when I woke up, I found a technician was already in route to the house. The problem was repaired within an hour. They replaced the buried shut-off valve by extending the pipes to keep the valve above ground, so it is accessible and functional, and not subject to corrosion from being in the dirt. It's so refreshing to deal with a competent, reliable company. Always friendly, easy to communicate with, and quick to respond. They invoice me via email and take my payment online. Could not be more convenient.

The two gentlemen that came were very knowledgeable and efficient. The reason for our call was an issue regarding the line from the freezer (ice maker) to plumbing of the house.

Overcharged for time and supplies and our water pump still can't pump out water. Bad experience and wouldn't recommend for use.

I've never used a plumber in my 75 years. These guys did a great job. Diagnosed my shower leak to the shower head extension tube. Replaced it and leak tested it and the shower pan. They also recommended a guy to replace the soggy drywall. Who also did a great job.

We had such a problem trying to get a plumber to come out to fix our backup. We were recommended by another customer who was very satisfied with their work as well. They were having some problems while they were trying to fix the backup and they called 3 extra guys to come help. They came out and not only fixed our problem but provided GREAT service. It started pouring while they were here and they still kept working through it all. They also have super affordable prices! I highly recommend them!

I have used Johnson Plumbing 2 or 3 times in the past. Up until the last time, I was satisfied with their service. In early August of 2022, I called them to fix a leak near an outside faucet on my rental house. When the job was finished, I met with the repair man and paid him the amount he requested. Never was I told that the amount requested was only a portion of the total repair bill. Logically, I assumed the repair was paid in full. More than four months later, just before Christmas, I was contacted and told that I owed an additional $280. Had I been told the total price of the repair when it was completed, I would have paid the bill at that time. However, receiving an unexpected bill from a job completed over 4 months ago, it not only seems unprofessional, but suspicious as well. Will I use them ever again? I think not!

Jason was great. Company is very expensive. Not sure if I would call them again. We were in an emergency situation and I did not have time to get other quotes.

Technicians came twice and charge double for service to fix a water heater that could be done in one day. One day they installed the pilot (I was charged per hour of service and part) but my heater it wasn't fixed. Now my controller was broken , they had to come back another day. They gave me the part number so I can buy it myself , I didn't go to the local store they want. I bought the part online (very carefully, with the model number and part number ) $250 dollar cheaper from the store they advised. When the technicians came to install it, they told me that it was the wrong part and they made me buy it from the local store . Then, they compared the parts and both were identical but the one from the store had a small adapter. The result of this, I was charged for two services , they made me return the cheaper part, after recognizing that it was the right part but the small adapter was missing. I could order the adapter easily but they were already charging per hour of service. The part that I bought in the local store includes pilot part that I was charged the first day and they kept it. I called to complain and guess what, I was blamed for all this just because I bought it online. they sent me an additional invoice for $160 that I should not be charged. And I lost $250 in the ""wrong part ""+ $40 in the pilot they kept . I lost $450 for trusting this company. Stay away and find a company that is accountable for it mistakes and doesn't punish its customers for trying to save some money.

JP came to repair a drain pipe. Charged me over $400. Within a year I had to have another Plummer replace the entire pipe. JP had only put a ""patch"" on a corroded drain pipe rather than fix the problem correctly.
Cost another $400+ to have the job done correctly