Duncan Plumbing

Plumber and Backflow Service in San Antonio
Opening at 8:00 AM on MondayOpening at 8:00 AM tomorrowOpening at 8:00 AMOpen today until 5:00 PMSorry, we're closed
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Posted on Feb 5, 2018

Premature water heater failures can be prevented by flushing calcium and lyme build up from your heater regularly, changing your anode rod every 5 years, and having a thermal expansion tank. This will keep your heater in tip tip shape!

Posted on Dec 24, 2017

Happy Holidays to all! We appreciate everyones business this year. Our first year is coming to a close and will be spending time with our families untill January 8th. Please call and leave a message and calls will be retured after the 8th. We wish everyone have safe travels, family time, and a...

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Posted on Nov 1, 2017

Plumbing problems are usually caused by a bad installation. Don't let this happen to you. We use the best materials and knowledge for a lasting solution to your problems. Call us for expert repairs, that won't kill your budget. 210-400-1238

Posted on Oct 23, 2017

We do yard leaks, fast! Leaks usaully located and exposed in less than 1 hour! Call us to find out more 210-400-1238

Posted on Oct 17, 2017

We do drain cleaning! Call us to get those old drains flowing. We Guarantee our cleaning services for a minimum of 30 Days.

Posted on Oct 17, 2017

Recirculation systems are available for all homes!! Whether you have a recirculation line or not. Call us to get faster hot water, save water, time and money.

Posted on Sep 26, 2017

We provide Free Estimates No Service Call Fee Same Day Service Warranties on Parts and Labor Backflow Testing and Repair Leak Detection and Repair Reroutes Replacements And Much More....... Call To have a true expert at reasonable prices take care of your Family or Busi...

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Posted on Aug 10, 2017

Duncan Plumbing is proud to serve San Antonio and the surrounding Metro areas. We are the true plumbing professionals you've been looking for. Backflow Testing Half Off the month of August. Call to schedule your test now (no limit on number of tests, limited availability left).

About Us

We are a small plumbing company serving the San Antonio and surrounding Metro area including Boerne, New Braunfels and Canyon Lake.  Commercial and residential problems are no more,  if you have had issues other plumbers that could not or would not fix we can help.  If you need backflow tests, repairs, or replacements we can help. Duncan Plumbing specializes in leak detection, re-routes, water heater repairs/replacement, boilers, gas leaks,  advanced troubleshooting and diagnoses,  underground leaks, and almost all other plumbing problems.   We are factory certified to repair most water heaters, and boilers. We have over twenty years experience in the plumbing and backflow business.  We wear boot covers, perform our job as if it was our own home or business, and provide unmatched service and guarantees.  Our technicians are fully licensed and insured.  Call us to schedule your service, we look forward to providing you with competent service. We accept cash, check, and all major credit and debit cards,

Thank You, 
Jon Duncan MP-40679

Complaints may be filed at :  Texas State Board of Plumbing Examiners, PO Box 4200, Austin, TX.  78765  PH: (512)936-5200 ,  Toll Free :  1-800-845-6584

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  • (210) 400-1238

Business Hours

Mon:8:00 AM – 5:00 PM
Tue:8:00 AM – 5:00 PM
Wed:8:00 AM – 5:00 PM
Thu:8:00 AM – 5:00 PM
Fri:8:00 AM – 5:00 PM