Slab Leak Detection Services in Fontana & Surrounding Areas

Fast, accurate leak detection using advanced equipment to protect your property
Schedule Free Leak Detection

Professional Slab Leak Detection You Can Trust

When water leaks under your concrete foundation, it can cause serious damage to your Fontana, Upland, or Rancho Cucamonga home. AS Plumbing & Mechanical specializes in finding these hidden slab leaks before they destroy your floors, walls, or foundation.

Our experienced technicians use electronic leak detection equipment and acoustic listening devices to pinpoint the exact location of underground pipe leaks. This saves you money by avoiding unnecessary concrete cutting and guesswork repairs.

We serve homeowners throughout Corona, Redlands, Glendora, and all nearby communities who notice signs like warm spots on floors, unexplained high water bills, or the sound of running water when everything is turned off. These are often early warning signs of slab leaks that need immediate attention.

Our team responds quickly because we know slab leaks get worse over time. We'll locate the problem, explain your repair options, and get your plumbing system back to normal. Most leak detection services are completed the same day, giving you peace of mind and protecting your biggest investment.

24/7 Emergency Support

We provide 24/7 emergency plumbing support to address urgent issues anytime.

Customer Satisfaction

Our top priority is customer satisfaction, ensuring every client is happy with our work.

Quality Assurance

We guarantee quality workmanship and use high-grade materials for all projects.

Most Frequently Asked Questions

Do you service areas outside of Fontana?
Yes, we provide slab leak detection throughout Upland, Rancho Cucamonga, Corona, Redlands, Glendora, Orange County, Pasadena, Monrovia, and all surrounding communities in the Inland Empire and nearby areas.
How long does slab leak detection take?
Most leak detection services take 2 to 4 hours depending on your home size and the leak location. We typically complete the detection the same day you call, so you can move forward with repairs quickly.
How do you detect slab leaks without digging up my floor?
We use electronic leak detection equipment and acoustic listening devices to locate leaks through your concrete slab. This technology lets us pinpoint the exact spot without any guesswork or unnecessary demolition.
What are the warning signs I have a slab leak?
Common signs include warm or hot spots on your floors, unusually high water bills, the sound of running water when everything is off, wet carpets or flooring, and cracks in walls or floors. If you notice any of these in your Fontana or Upland home, call us right away.

Current AS Plumbing Promotions

Full Home Repipe

$1,500 Off

Solve low pressure and water quality issues permanently
Increase property value and prevent future emergencies
Minimally invasive installation protects your home
Get Free Estimate
November 15, 2025
$1,500 discount on complete hot and cold water supply line repipe. Minimum project scope required. Does not include drain lines. Limited time offer.

Leak Detection Special

Free Leak Detection

Expert detection finds hidden leaks fast
Prevent structural damage and mold growth
Clear upfront pricing for any needed repairs
Find My Leak
November 15, 2025
Diagnostic fee only, does not include repairs. Repair quote provided separately. Valid for one leak issue per household during standard business hours.

Water Heater Special

$799 Off

Endless hot water on demand—never run out
Lower utility bills with energy-efficient technology
Space-saving design—no bulky tank needed
Save $799 Now
November 30, 2025
Discount applied to complete tankless installation. Modifications to plumbing, gas, electrical, or venting extra. Customer pays permit fees. Limited time offer.

Drain Cleaning Special

$69

Expert cable cleaning of one drain line
Fast restoration of proper water flow
Service for kitchen, bathroom, or shower drains
Clear Your Drain
December 31, 2025
Valid for one residential drain line with accessible ground-level cleanout. Does not include main sewer lines, hydro-jetting, or toilet removal. Standard business hours only.

Gas Leak Detection

$250

Licensed technicians with advanced detection tools
System-wide pressure test of all gas lines
Detailed upfront estimate for repairs
Protect Your Home
November 30, 2025
Valid for residential properties only. Cannot be combined with other offers. Some restrictions may apply.