RK Knight Plumbing
Company Overview
Since 1956, R.K. Knight Plumbing in Whittier, CA has proudly operated as a family-owned business. At R.K. Knight Plumbing, we provide a wide range of plumbing solutions such as drain repair, trenchless drain repair, drain cleaning, hydro-jetting, plumbing fixture repair, commercial plumbing, water heaters, water lines, gas lines, and trenchless installations for water and gas mains, plus additional services!
Ronald Knight Sr. began his plumbing career in 1947, focusing on new construction projects in the Los Angeles and Palm Springs regions. In 1956, he made the decision to establish his own company, R.K. Knight Plumbing. In 1980, Ronald Knight Jr., Sr.'s son, chose to follow in his father's footsteps and joined the family business. After years of commitment to his family and labor, Sr. left us in 2007. Today, Ronald Jr. is supported by his two eldest sons, Ronnie III and Randy, to uphold this family legacy. Ronnie III serves as the general manager, while Randy is one of our skilled technicians. Our family business is rounded out by Delia, our office manager, along with technicians Shawn and Memo.
I inherited this business from my dad, who took over from his own father. I enjoy going to work, meeting new people, and hearing their unique stories. I find it fulfilling to solve unexpected problems for others. Moreover, encountering someone who recalls me as a kid working alongside my grandpa is a unique feeling. I realized that my father and grandfather held great respect in our community and the plumbing field, and I aimed to attain that same honor.
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line 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: | 8:00 AM - 5:00 PM |
Tue: | 8:00 AM - 5:00 PM |
Wed: | 8:00 AM - 5:00 PM |
Thu: | 8:00 AM - 5:00 PM |
Fri: | 8:00 AM - 5:00 PM |
Sat: | 8:00 AM - 12:00 PM |
Sun: | Closed |
Recommended Customer Reviews

RK Knight is a honest, reputable company. They get the job done right!

Our bathtub clogged up last Friday. We didn't know about it until after 2pm Friday afternoon. We called RK Knight Plumbers, and they came out within the next 90 minutes. We were very happy with the prompt and efficient service we received! They were able to take care of our problem in a very short time. We will always use RK Knight & highly recommend them!

R.K. Knight is a reliable plumbing service.
The company has worked on my plumbing
and installed a new garbage disposal in the last two months. Their employees are professional and knowledgeable. I found their prices to be fair. I plan to use the company for all my plumbing needs. Their response time was prompt.

This company is great! I was able to get an appointment the very next day. Randy arrived right on time which I really appreciate. Randy was great. He quickly figured out the problem and fixed it. He did this even though all of my dogs wanted to constantly say hello. I would absolutely recommend this company.

Awoke and jumped in the shower. After the shock of icy water, I shivered to the water heater to find no pilot light. Tried to get it back going with no luck!
Called RK Knight. They have done work at this house since my grand parents owned it.
They gave me a time of 2-4PM and promised sooner if a worker became available. About 11am I get a call that help is on the way.
Randy takes a look, tries to start the pilot. Concludes the unit looks good and it is likely the Thermo Coupler. We agree on a price and he gets to work. All done in about 40 minutes.
All looks good and clean. Hot water is flowing. Thanks Randy!

After calling several other local plumbers just to come out and provide a quote I was quickly frustrated with their canceling of appointments and lack of response. I finally called RK Knight on a Saturday and they came out on the same day to evaluate and quote. They came back on Monday to perform the work for the agreed upon price. Lou was honest and friendly and I will definitely call again.

We have had a home in Whittier for 28 years, and RK Knight Plumbing has always been our go to plumber. I can do a lot of home repairs, but I don't do plumbing well at all. Recently we have been having trouble with a kitchen line backing up. They have come out to unplug it and a couple of months later it is clogged again. This has happened 4 times in the past 6 months. Their warranty has them coming back without any additional charges from the first time, but I have been getting frustrated at the problem. They too have been frustrated and finally Lou suggested we try a jet spray of the pipes. More expense, but wham! The pipes were clear. He ran a camera down the pipes and yes they were clear, but the problem would be back because the contractor that I used to replace all of the drain lines 10 years ago turned out to have been very unqualified.
Lou and Shawn came back the following day, and in less than 3 hours had the old pipes cut out and a proper set installed and with a pitch that kept the water flowing. Unlike my previous setup that had dips and valleys that created mini traps throughout the lines. I was holding my breath at the cost, but they came up with a price that was fair. The best news, it all works perfectly now.
This company employs good plumbers that know what they are doing. They are focused on repeat customers, so they do everything possible to make you happy!

Very kind, courteous, prompt, honest, arrived before promised time, CLEANED up the mess, and the price was very reasonable.

Very honest, straight-forward, 'no-nonsense' sorta company. They told me what I could get done for the various price points and did not try to pressure me into an ""up-sell."" They had to clear roots out of our main sewer line exiting the house--(as of now, we've opted for the temporary, as opposed to permanent fix for this problem)--but the plumber educated me on what exactly was going on, what I'd eventually have to do, and what my various options were. Part of this job was actually pretty disgusting, and our guy dove right in and cleaned it all up without batting an eyelash. We have used them for other problems in the past as well, and they were always quick to respond and very easy to do business with. RK Knight is the sort of small, family-run, honest-dealing company that we're rapidly losing in this country (which is sad). But hire these guys and you'll get a taste of how things used to be...and how things ought to be still.

Found RK Knight on yelp because of other great reviews. The team was very honest about scheduling for work to be done at my property and very quick to get the job done. One of the employee's took his time to not only explain the work to be performed at my home but also took time to draw out the problem so I can understand the plumbing issue under my home. I have never seen someone take time out to draw out the issue in order to help me understand. I appreciate a company that not tries to sell you a product or service but really takes the time to help you understand the problem and options to get it completed. I would highly recommend RK Knight to my friends and family. Thank you very much for the hard work by Ronnie and his team.