Professional Leak Detection in McAllen, TX
We provide non-invasive diagnostic testing to locate hidden water and sewer leaks accurately—before any repair work begins. Our process is designed to confirm whether a leak exists, identify the affected system, and narrow the location without unnecessary damage.
Quick answer
How much does leak detection cost in McAllen, TX?
At All Valley Plumbing & A/C Co., leak detection in McAllen, TX ranges from $400 to $800 (prices updated September 22, 2026). You can see your exact price online and book without a sales visit, and your price is approved before any work begins. Call 956-686-6656 if you would rather talk to someone.
Upfront Price Guide
See your price before anyone comes out. No sales visit, no upsell — your price is approved before work begins.
Website Special pricing applies when you book online or mention our website pricing when you call. Standard pricing applies otherwise.
| Service | Price |
|---|---|
| Water Leaks & Slab Leak Detection | Standard $460–$920Website Special $400–$800You save up to $120Calling? Just say 'Website Special.' |
| Hydrostatic Testing – Main Sewer Line | Standard $665–$1,125Website Special $575–$975You save up to $150Calling? Just say 'Website Special.' |
Prices last updated: September 22, 2026
Slab Leak Detection and Repair - Rio Grande Valley
Water Leaks & Slab Leak Detection
Pricing may vary based on:
- Accessibility of plumbing lines
- Whether the leak is located under slab, behind walls, or underground
- Time required to isolate systems and confirm findings
This service includes system isolation, pressure evaluation, and advanced detection methods to pinpoint the leak location or zone.
Hydrostatic Testing – Main Sewer Line
Pricing may vary based on:
- Size of the home
- Number of sewer exit points or cleanouts
- Foundation type and access conditions
Hydrostatic testing is used to confirm leaks in underground or slab-embedded sewer and drain systems by monitoring controlled water levels over time.
Website Special pricing applies when you book online or mention our website pricing when you call. Standard pricing applies otherwise.
Additional Specialized Testing
Domestic Water Line Hydrostatic Testing
Used to test interior domestic water piping systems to confirm system integrity or identify concealed leaks within walls, ceilings, or slab foundations.
Shower Pan Testing
Shower pan testing is performed using controlled water testing combined with thermal imaging to detect moisture migration beneath tile, showers, and surrounding walls—without demolition.
Technology Used
- Acoustic leak detection equipment
- Pressure testing and system isolation
- Thermal imaging cameras for moisture and heat pattern analysis
This diagnostic approach minimizes unnecessary cutting and reduces guesswork.
Thermal imaging reveals hidden moisture and leak locations without demolition
What You'll Receive
- Confirmation of whether a leak exists
- Identification of the affected system (water or sewer)
- Defined leak location or test results
- Clear explanation of repair options before any work proceeds
Important Pricing Note
Prices shown are the published ranges for each service. When you book, you approve the posted range. If the job needs anything outside that scope, you see that price and approve it before any work begins.
Service Areas
We provide leak detection and hydrostatic testing throughout the Rio Grande Valley:
McAllen • Mission • Edinburg • Pharr • San Juan • Alamo • Donna • Weslaco • Harlingen
Leak Detection FAQs
Suspect a Hidden Leak?
Get accurate answers without destroying your home. Book leak detection online at the posted price.