Service Hours: 5:00 AM – 11:00 PM 210-972-1022
Licensed • Insured • BBB Accredited

Water Heater Repair, Replacement & Installation in San Antonio — Tank or Tankless

We’ve Spent 38 Years Replacing Texas Water Heaters & More

Same-day repairs, full replacements, and new installs for tank and tankless systems, gas or electric. Rainstone technicians work out of San Antonio, and every job comes with a warranty.

Tank & tankless, gas & electric systems
Accurate diagnosis, dependable repairs
Workmanship + manufacturer warranties
Emergency & weekend service available
Call 210-972-1022 See Pricing
7 Days
Open 5 AM – 11 PM
5am–11pm
Service Hours, Daily
100%
Workmanship Warranty
Kurt Pinkerton in a San Antonio garage with a water heater
Kurt PinkertonResponsible Master PlumberLic. # M-21546
Book a $125 Service Call

Written quote before any work begins — a technician will call to confirm your appointment.

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    Professional water heater service in San Antonio

    I’m Kurt Pinkerton, Rainstone’s responsible master plumber. Watch how we handle water heater repair and replacement on real jobs here in San Antonio — then call us any day from 5 AM to 11 PM, and we’ll take care of yours.

    Thirty-eight years in this trade, 27 of them carrying a master plumber’s license, and it all reduces to this: do the work like the inspector is family and the customer is family. I’m a grandfather — I know what a family home runs on, and it runs on hot water. San Antonio’s hard water kills more water heaters than age does, which is why I push honest sizing and regular maintenance so hard. And don’t let anyone talk you out of the permit: it’s your proof the job was done safely and to code. Every job we finish carries a warranty, and my name.
    — Kurt Pinkerton, Responsible Master Plumber, Lic. # M-21546

    Call 210-972-1022

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    About Rainstone

    Built on quality workmanship, real warranties, and honest diagnostics

    Rainstone Water Heaters provides professional water heater repair, replacement, and installation services in San Antonio and throughout the surrounding area. Our fully licensed and insured technicians service tank, tankless, gas, and electric water heaters, diagnosing issues quickly and delivering dependable solutions for homeowners.

    From a single repair to a full replacement, we focus on quality workmanship and results that last — and every project we complete is backed by both a workmanship warranty and the manufacturer’s warranty.

    I’m Kurt Pinkerton, Rainstone’s responsible master plumber. When you call our San Antonio office, you get licensed plumbers who quote the work before we start it — and stand behind it when we finish.

    My honest take: a plumbing company earns a town one honest quote at a time — that is the only marketing I have ever believed in.

    • Licensed & Insured

      Every technician is fully licensed and insured for residential water heater work.

    • BBB Accredited

      Backed by both workmanship and manufacturer warranties on every job.

    • Based in San Antonio

      Proudly serving San Antonio and the surrounding communities from our local office.

    What We Do

    Complete water heater services

    Maintenance, repairs, full replacements — our technicians handle every make and model with care.

    Our San Antonio services:

    Areas we serve from our San Antonio office:

    Water Heater Repair

    Fast, accurate diagnosis and dependable repair for tank and tankless systems, gas or electric.

    Water Heater Replacement

    Complete, code-compliant replacement when a repair no longer makes sense — done right the first time.

    New Installation

    Professional installation of tank and tankless water heaters for new builds and remodels.

    Heating Element & Thermostat

    Replacement of electric heating elements, thermostats, igniters, and thermocouples on gas units.

    Flush & Maintenance

    Routine flushing and tankless descaling to extend the life and efficiency of your system.

    Leak & Emergency Repair

    Leak repair at fittings, connections, and valves, plus emergency response during our 5 AM – 11 PM service hours.

    Transparent Pricing

    Water heater service pricing

    Upfront, honest pricing for San Antonio homeowners — no surprise charges after the job is done.

    Diagnostics & Repair Parts
    Service Call / Diagnostic $125
    All Other Repairs Quoted in writing after diagnosis
    Heating Element Replacement (electric tank) Quoted after the $125 diagnosis
    Thermostat Replacement Quoted in writing before work begins
    Anode Rod Replacement Priced after diagnosis, in writing
    Pressure Relief Valve Replacement Quoted in writing before work begins
    Gas, Tankless & Maintenance
    Gas Control Valve Replacement $615
    Standard Tank Installation — Good $1,850 · Better $2,450 $1,850 – $2,800
    Tankless Installation — Best from $4,800 $4,800 – $6,000
    Every Repair Quote In writing, before work begins
    Service Hours 5 AM – 11 PM, 7 days a week
    Open 7 days a week: 5 AM – 11 PM
    Every job starts with a $125 service call and a written quote.
    How It Works

    Our four-step service process

    A straightforward path from your first call to a fully warrantied repair or replacement.

    01
    Call or Book

    Call us any day from 5 AM to 11 PM and tell us what's going on with your water heater.

    02
    Diagnose

    A licensed technician inspects your system and pinpoints the exact issue.

    03
    Upfront Quote

    You see your options and the full price before we start any work.

    04
    Repair & Warranty

    We complete the work and back it with a workmanship and manufacturer warranty.

    A Rainstone Water Heaters service truck
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    The Rainstone Water Heaters team with Kurt Pinkerton

    Water Heater Services in San Antonio

    Our San Antonio office, at 24123 Boerne Stage Rd, Suite 455, is home base for Rainstone’s work across the Alamo City and the Hill Country edge — including the two communities that belong to this office, New Braunfels and San Marcos. The nine services are the ones we hang our name on everywhere: inspections, repairs, replacement, installation, tankless systems, maintenance, emergency repairs, leak detection, and commercial water heaters.

    San Antonio’s water arrives from the Edwards Aquifer, and it is hard enough to be a character in every job story we tell. It scales tankless exchangers, fills tanks with sediment, and punishes any water heater that is not maintained — in a city that also asks those heaters to serve big households, military families on the move, and a steady stream of new construction from the north side to the Hill Country corridor. Our answer is the same discipline we practice everywhere: a $125 service call, a diagnosis of the whole system rather than the symptom, and a written quote before any work begins. If the tank can be saved, we save it and tell you how to keep it alive. If it cannot, we will show you why.

    Staying ahead of hard water is exactly what our annual maintenance visits are for — a flush for tank systems, a descaling for tankless, done on schedule every year. The San Antonio office answers seven days a week, 5 AM to 11 PM, at 210-972-1022.

    From the field: a San Antonio tankless, scaled shut

    The complaint was a familiar one in San Antonio: a tankless water heater that had started delivering bursts of cold water mid-shower, then faulting out altogether. Edwards Aquifer water is some of the hardest in Texas, and a tankless heat exchanger feels every grain of it.

    On inspection, the exchanger’s narrow passages were lined with mineral scale and the inlet filter was carrying more of the aquifer than it should. The unit was not failing — it was suffocating, slowly, the way every undescaled tankless in this city eventually does.

    The fix was a full descale, the filter cleaned, and the unit returned to steady service the same visit — then the part that actually prevents the sequel: an annual descaling rhythm, set before the crew left. Tankless units here do not wear out so much as they scale up. Kept on schedule, this one has years of quiet work ahead of it.

    • Licensed & Insured

      Every technician is fully licensed and insured for residential water heater work.

    • BBB Accredited

      Backed by both workmanship and manufacturer warranties on every job.

    • Based in San Antonio

      Proudly serving San Antonio and the surrounding communities from our local office.

    Common Questions

    Frequently asked questions

    Answers to what San Antonio homeowners ask us most before booking a repair or replacement.

    Ask Us Directly

    Yes. Our licensed and insured technicians service tank, tankless, gas, and electric water heaters, from routine maintenance to full replacement.

    Our phones and our service window run 5 AM to 11 PM, seven days a week — call any day during those hours and a licensed Rainstone technician will help you.

    We’re based in San Antonio and serve homeowners throughout the San Antonio area.

    Yes. Every job is backed by both a workmanship warranty and the manufacturer’s warranty on parts and equipment.

    Every repair starts with a $125 service call. We diagnose first and give you the full price in writing before any work begins — a common repair like a gas control valve replacement, for example, is $615 flat.

    Yes — Rainstone Water Heaters is fully licensed and insured, and is BBB accredited.

    Find us in San Antonio

    24123 Boerne Stage Rd, Suite 455, San Antonio, TX 78255 — open 5 AM to 11 PM, seven days a week.

    Get Directions

    Get In Touch

    Reach us any way you like

    Call, email, or fill out the quick form at the top of the page — a real person follows up every time.

    Phone
    210-972-1022
    Open 5 AM – 11 PM daily
    Office
    24123 Boerne Stage Rd, Suite 455,
    San Antonio, TX 78255
    Service Hours
    5 AM – 11 PM
    7 Days a Week

    Water heater trouble? We're already on the way.

    Call us any day from 5 AM to 11 PM, or book online — a licensed Rainstone technician will diagnose and quote your repair before any work begins.

    210-972-1022

    San Antonio

    Call Now