Alt Plumbing and Leak Detection

★★★★★ 4.7 / 5 (51)
Emergency Call


: San Marcos, CA 92078
: (760) 761-1166
: http://www.altplumbing.com/

Company Overview

Whether it’s a simple jammed disposal or a full remodel, Alt Plumbing is equipped to manage both small and large plumbing tasks, including sewer, gas, and water line replacements. We specialize in detecting and repairing leaks, and we’re here to help you with your insurance process. Additionally, we focus on high-end fixtures for remodels.

Hello, I’m John, a second-generation plumber. As a family-owned business, we bring over three decades of plumbing expertise. Customer satisfaction is my priority, and I take great pride in the plumbing work I deliver. If you’re not pleased with our service, I will do everything possible to rectify the situation. I use high-quality materials that may cost a bit more but offer greater durability over time. My goal is to provide you with all possible options so you can make an informed choice about your plumbing repairs. We take pride in our work and eagerly anticipate meeting you. We treat our clients like family. You can count on us to be reliable, punctual, courteous, ethical, and fair. We aim to impress you with our service and earn your loyalty.

In North County, we are your trusted plumbing solution. We welcome your questions and feedback, so please reach out anytime. We look forward to connecting with you soon.

Your support is vital to our future.

Best regards, John Alt, Owner
Being a second-generation plumber and a dedicated North County San Diego local fills me with pride. I have a deep passion for my career, my family, and providing excellent service to my clients. I am confident in my ability to deliver top-quality service with the best materials, one client at a time.

Business Services

  • Bathtub installation
  • Bathtub repair
  • Damage restoration
  • 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
  • Mold remediation
  • 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:7:00 AM - 11:00 PM
Tue:7:00 AM - 11:00 PM
Wed:7:00 AM - 11:00 PM
Thu:7:00 AM - 11:00 PM
Fri:7:00 AM - 11:00 PM
Sat:7:00 AM - 11:00 PM
Sun:7:00 AM - 11:00 PM

Recommended Customer Reviews

Sharon F.
★★★★★

John Alt is such a great guy to work with. He listens and knows the plumbing solution to any plumbing issue. He's a hard worker and really cares about taking care of the customer. I would recommend him each and every time to anyone needing an honest and experienced plumber.

Eric X.
★★★★★

Good service, fast response, price is also reasonable. Richie is the hero guy to provide service to me.

Frank W.
★★★★★

I encountered a sudden drop in water pressure on my kitchen faucet. My wife and I tried to fix the issue ourselves thinking it was the cartridge that was bad. But we had no success. It was time to call a professional and I contacted Alt plumbing. They showed up on time and diagnosed the problem within 30 to 40 minutes and fixed my faucet. They were easy to work with the price was very reasonable. I would definitely recommend them for plumbing issues.

Karen T.
★★★★★

Probably can't say enough good things about my experience! We had a leak in the garage ceiling which we discovered late on Friday night. I started calling plumbers Saturday morning and spoke to the very friendly and nice Sydnee who said John would be able to get to me that day and gave me a 3 hour window. John was at my house right in the middle of that time frame and quickly discovered the source of the leak in a very tricky, poorly accessible spot. He was still able to to get his hands in there to fix it with minimal removal of dry wall and a lot of dexterity. Coupled with the fact that John is very friendly, knowledgable, professional and efficient...and charged me a very fair price...I couldn't have been happier. I thought I'd need to have the water turned off all weekend as other plumbers were either closed or said they couldn't come out until Monday! I highly recommend John and Alt plumbing!!

James A.
★★★★★

Great plumber!!! Hard working, fast, and very nice people. It is affordable and quality plumbing. They are very respectful around the house and clean up better then they found it. 100% recommend them. The owner John is a great guy.

Brad R.
★★★★★

Best plumber. Quickly figured out a complex problem and cost effectively solved it. He spends the time to understand an issue and then solve it. A true master of his craft.

Jorge G.
★★★★★

We are really happy with Alt Plumbing! They are friendly and they really know what they are doing. They made it very clear when they could save me money and what they were going to do. Very trustworthy. Would definitely recommend!

Alyson M.
★★★★★

We have used John on two separate occasions now. He did great work both times finishing the jobs pretty quick and for a fair price. Definitely our go to guy when we have a plumbing issue!!

NB K.
★★★★☆

I think I've found ""my"" plumber! Friendly, fast, knowledgeable, fair price, good work. For what more can one ask? John is now my ""go to"" plumber.

Tiffany B.
★★★★★

Thank you so much to Both John and Travis for fixing our plumbing promptly and for having excellent pricing! It's nice to be able to trust a company to do the job right the first time. Genuine good people! Would recommend to everyone!

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