Get water heater repair and tankless installation in San Antonio from a veteran-owned plumbing team. CSW checks the equipment, explains repair or replacement options and performs plumbing in-house under RMP #46592.
Call 24/7, anytime, day or night.
Trade work is performed under the applicable Texas credentials: Texas Electrical Contractor TECL #31793, Responsible Master Plumber RMP #46592, and Texas Air Conditioning and Refrigeration Contractor TACLA00026479R (commercial refrigeration endorsement).
Tell us whether there is no hot water, not enough, or a leak, plus the heater age and your ZIP code. A licensed CSW plumber will follow up.
Call 24/7 at (210) 880-2864 or book your estimate to discuss your project.
Tankless water heater repair in San Antonio starts with a licensed plumber checking the unit and its connections. Flushing removes the hard-water scale that San Antonio's water builds up inside. C.S.W. Power Solutions repairs and installs tankless water heaters from brands including Rinnai, Navien and Noritz, and explains the repair or replacement options before work begins.
Tank water heater repair options in San Antonio include replacing a thermostat, heating element, anode rod or valve. Leaks from the tank itself indicate internal corrosion, and the unit needs replacement instead of repair. For a full swap, see water heater replacement in San Antonio.
C.S.W. Power Solutions is a veteran-owned plumbing contractor providing water heater repair, replacement, and tankless installation across San Antonio. Responsible Master Plumber license RMP #46592. VA Builder Registration #09311 is a separate registration; housing adaptation grant eligibility is confirmed with the VA.
San Antonio's hard water accelerates sediment buildup inside water heaters, reducing efficiency and shortening lifespan. Annual flushing removes sediment and extends your unit's life significantly. We repair and replace all major brands including Rinnai, Navien, Noritz, Rheem, Bradford White, A.O. Smith, and Bosch.
In San Antonio, a storage water heater whose cold water supply passes through an on-site check valve, pressure-reducing valve or backflow preventer needs a thermal expansion tank (amended IPC 607.3). See Expansion tank repair and installation in San Antonio.
CSW Power Solutions diagnoses, repairs, and replaces water heaters for San Antonio properties, covering both standard tank and tankless systems.
Tank and tankless water heater replacement, code upgrades (pans, valves, expansion tanks), and disposal of the old unit.
| Service | Typical Range |
|---|---|
| Tank Water Heater Repair | $298 – $785 |
| Tank Water Heater (40-gal gas) | $1,200 – $2,500 |
| Tank Water Heater (50-gal gas) | $1,400 – $2,800 |
| Tankless Water Heater Installation | $4,500 – $10,000 |
| Electric Water Heater Replacement | $1,100 – $2,000 |
| Expansion Tank | $200 – $400 |
| Annual Flush / Maintenance | $149 – $250 |
Prices include equipment, labor, old unit disposal, and permits. Final cost depends on tank size, access, gas line condition, and whether an expansion tank is required. Free on-site estimates provided before any work begins.
We assess your current water heater — age, condition, fuel type, and capacity — to determine whether repair or replacement is the right call.
We recommend the right unit for your household size and budget, and provide a detailed quote including all parts, labor, and disposal.
We schedule the replacement by availability. For an urgent no-hot-water situation, call (210) 880-2864 and we'll confirm availability for your situation.
We disconnect and haul away your old unit — no disposal fees or trips to the dump for you.
We install the new unit, connect gas or electrical, install the expansion tank, and verify all connections meet current plumbing code.
We test the unit for proper temperature, pressure relief, and leak-free connections, then walk you through maintenance and warranty.
A leaking water heater can cause significant water damage if not addressed quickly. If you notice water pooling around your unit, our leak detection team can determine the source. San Antonio's hard water accelerates tank corrosion — installing a water softener can extend your water heater's lifespan. Gas water heaters require proper gas line connections, and electric models may need a dedicated circuit or panel upgrade — both of which we handle in-house.
C.S.W. Power Solutions is more than a plumbing contractor. As a general contractor, we also provide electrical services in-house; for HVAC-related needs, scope and availability are confirmed before work. Projects that require multiple trades — like bathroom remodels or water damage restoration — stay under one written scope, with one point of contact for planning, scheduling and questions.
A cold shower does not automatically mean you need a new water heater. An electric unit can lose heating capacity because of an element or control problem, gas equipment can have ignition, venting or fuel-supply faults, and a tankless heater can show a service code when flow or scale buildup needs attention. Diagnosis separates the equipment problem from a fixture, mixing valve or supply issue before parts are selected.
A repair can make sense when the fault is limited, parts are available and the equipment still suits your household. A leaking tank shell, repeated faults or an installation that needs substantial correction can change that decision. Compare the complete repair scope with the complete replacement scope, including access, venting, gas or electrical work, disposal and any required inspections. A tankless conversion needs its own capacity and installation review.
Before the visit, note when hot water stopped, which fixtures are affected and any code on the controller, and photograph the model label without removing covers. Keep people away from hot discharge water, wet electrical parts and a leaking unit. If you smell gas, leave the area and contact your gas utility or emergency services from a safe location.
Often a limited component or connection fault can be repaired. A leaking tank shell, recurring failures, parts availability and installation condition can make replacement more practical. Diagnosis comes first.
Confirm the replacement scope with the authority for the property. San Antonio Development Services provides residential permit guidance; surrounding cities and counties have their own requirements.
Water heater work in San Antonio is licensed plumbing. These official sources let you verify a plumber's license, read the codes the City has adopted and compare high-efficiency models.
The State's public license search for Texas plumbers, including CSW's Responsible Master Plumber license RMP #46592.
The City's guide to when a residential permit is needed and who may obtain electrical, plumbing and other trade permits.
The building, electrical and plumbing codes in force in San Antonio, including the 2024 International Code Council codes adopted in January 2025.
ENERGY STAR's guide to certified heat pump water heaters and how they compare with standard electric models.
Contact C.S.W. Power Solutions for water heater repair or replacement.
Free Written Estimates · Veteran-Owned
Online estimate appointments need at least 24 hours' notice. Need help sooner? Call 24/7: (210) 880-2864.
Veteran-, Family- & Minority-OwnedTexas Electrical Contractor TECL #31793Responsible Master Plumber RMP #46592
Compare the service that fits your project, then call (210) 880-2864 to discuss your estimate.
Books a free on-site estimate consultation at an open time on our Calendly schedule. It is not a repair dispatch — for anything urgent, call us.
Online estimate appointments need at least 24 hours' notice. Need help sooner? Call 24/7: (210) 880-2864.