Guarantee Plumbing & AC, Inc.

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About Guarantee Plumbing & AC, Inc.
Guarantee Plumbing & AC, Inc. operates as a licensed plumbing contractor serving San Antonio homeowners and property managers. Founded in the early 2000s, the company maintains an office on the city's northeast side and currently holds a 3.9-star average across 41 customer reviews. Regular service hours run Monday through Friday from 8 AM to 5 PM, with Saturday and Sunday reserved for emergency callback availability. The business specializes in residential drain clearing, water heater installation, and slab-leak detection under existing concrete foundations.
Negative feedback in recent reviews raises concerns worth noting. Multiple customers describe situations where described services may not have achieved intended results, including one instance involving a cleared drainline that reportedly remained problematic afterward. Billing disputes appear across several reviews, with one customer referencing a $13,000 drain repair project and another mentioning a maintenance agreement where promised preventive checks did not prevent subsequent equipment failure. The company's receptionist consistently earns positive mention for phone handling and professional communication.
Working Hours
| Sunday | Closed |
| Monday | 8 AM–5 PM |
| Tuesday | 8 AM–5 PM |
| Wednesday | 8 AM–5 PM |
| Thursday | 8 AM–5 PM |
| Friday | 8 AM–5 PM |
| SaturdayToday | Closed |
Services
Drain Clearing & Rooter Service
Main line and secondary drain blockage removal using rooter equipment and jetting services.
Water Heater Installation
Traditional tank-style water heater replacement including gas and electric models.
Slab Leak Detection
Underground pipe leak location using acoustic listening devices and pressure testing methods.
Maintenance Agreements
Annual or semi-annual service contracts covering water heater inspection and pressure checks.
General Plumbing Repairs
Leak detection, fixture replacement, shower valve repair, and related residential plumbing fixes.
Emergency Callback Service
After-hours urgent plumbing response for existing customers experiencing flooding or major leaks.