John Castro Plumbing
Company Overview
Specializing in TANKLESS water heaters, John Castro Plumbing and Construction serves the greater Los Angeles area, extending to the San Fernando Valley, Santa Clarita Valley, Orange County, and Ventura County, with new services available in Las Vegas, NV. Our services encompass all aspects of plumbing and repairs, tankless water heaters, and we take pride in transforming kitchens and bathrooms. We excel in top-notch tile and stone craftsmanship at competitive wholesale prices!
Having 40 years of expertise, we offer the best prices in California on tankless water heaters, plus we offer exclusive package deals for bathroom remodels. We also undertake specialized custom projects. We offer a wide range of kitchen cabinets, with remodels finished in as few as 5 days!
No other plumber in the San Fernando Valley installs as many tankless water heaters as John Castro Plumbing and we can swiftly address even small repair jobs. Together with our associates, John Castro Plumbing and Construction provides the lowest hassle-free prices for room additions.
We strive to offer the highest quality service at the most affordable prices!
Established by John Castro in 1980. John Castro has been a trusted plumbing contractor in California for decades, a former insurance executive and a certified expert in all areas of residential and commercial plumbing. Continuing this tradition of excellence, Chris Castro serves clients in Los Angeles and Las Vegas! Chris serves on the Board of Building and Fire Code Appeals, is a Top Tier ""Ace Pro"" Rinnai Tankless Dealer/Installer, and also a Top Tier Rheem Tankless provider. Chris has also managed Home Depot stores, and has a background as an insurance agent specializing in tankless water heaters and energy-efficient solutions.
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

I was in the final stages of a home remodel and my new tankless system put in by another plumber wasn't working as expected. Before my final inspection was scheduled, I wanted a second opinion to make sure everything plumbing related was done properly and called John Castro Plumbing.
I spoke to Chris on the phone and he was in the area and stopped by on a Sunday evening to take a look. Who does that these days!! Chris looked at my plumbing, listed all the issues that needed to be corrected, and helped properly program my tankless system. I was so grateful to Chris. He gave me the reassurance that I needed. Thanks for everything, Chris!! I will definitely be using John Castro Plumbing for my plumbing needs in the future.

Chris Castro installed a tankless water heater at our house and did a terrific job. The price was more than fair, especially in light of the meticulous work he did. His knowledge of various tankless heaters and their characteristics was equally impressive.

John installed two Rheem tankless water heaters for me. He was on time, professional and very knowledgeable. I would definitely use again. On a side note he gave me a great price.

Very rare to find a person like Chris Castro. I was amazed the response he gave me to help restart my gas line on my tankless water heater early in the morning. He immediately gave me a code to restart without a service call. Matter of seconds it restarts. Wow. No financial gain. Would no doubt only call John Castro Plumbing for my plumbing needs.

My tankless water heater broke down during some stormy weather and one of the technicians (Chris C.) had reached out to help me troubleshoot. It turned out that there was a power/electricity issue, which helped me save time and money in fixing this issue. They responded very quickly and helped guide me through the troubleshooting process free of charge. It was much appreciated especially during the winter where every day without hot water counts!

I called Chris because our very old water heater had kicked the bucket. He helped me find the kind I needed, even though he was booked for the day and couldn't do the actual job. It's rare to find someone helpful and kind unless they are getting paid. I will 100% call him again when I have another plumbing issue.

Fantastic service. Was happy to diagnose issue over text free of charge to try and fix it over the phone before he even got here! Very friendly guy and happy to explain everything he's doing and why he stands behind the brands he chooses to install. You won't find anyone more knowledgeable about tankless water heaters, and I doubt you'd find a better price!

Chris at John Castro plumbing has been the best plumber I have ever used. He was able to help me troubleshoot my hot water heater problems and help me apply for the manufactures warranty.
Five star service, thanks Chris.

Chris Castro thank you so very much for answering my call immediately and carefully listening to the problem I was having with my water heater and trouble shooting with me over the phone. I did the things you asked me to and the problem was resolved! Best service I've received and you have my trust! Thank you so very much!

Chris had been communicating with me for the past year about getting a tankless water heater. We moved out of the country for 6 months, so it had to be delayed, but when we got back, I was ready to get this baby going.
Chris was responsive as usual, gave me updated quotes, and eventually we scheduled a date and he came and installed.
The outdoor tankless opened up so much space in our laundry room that formerly was cramped with a huge tank. He rolled it out front- picked up in less then 30 minutes.
He expertly worked on the piping and install, and let me pick his brain while he was at it (I'm a DIY queen and very curious how all the things work).
I have had it with tradespeople overcharging and doing shoddy work. Chris was NOT that tradesperson. He did great work, and his rate was below what I expected. He informed me what to do to get the rebate, and we received our check in a few weeks.
All in all, great experience with Chris and very glad we went with him. Now when do you get to say that about a tradesperson?
Thanks!