Water Heater Repair & Installation in St. Louis & St. Charles

No hot water is an emergency. Landmark Plumbing repairs and replaces all makes and models of water heaters — standard tank, tankless, and hybrid — quickly and at honest, upfront prices. We serve St. Louis and St. Charles County with same-day service available.

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  • Same-Day Service
  • All Brands Serviced
  • Free Estimates

Our Approach

What Our Water Heater Repair & Installation Service Includes

Every visit follows a thorough, professional process designed to solve your problem efficiently and leave your home or business in great shape.

  • Water Heater Repair

    Heating element, thermostat, anode rod, pressure valve, and pilot light repairs on all brands.

  • Water Heater Replacement

    We help you choose the right unit for your needs and install it correctly, hauling the old one away.

  • Tankless Water Heater Services

    Installation, descaling, and repair of gas and electric tankless systems including Rinnai, Navien, and Rheem.

  • Expansion Tank Installation

    Required by St. Louis code in closed systems u2014 we install and test to ensure proper pressure regulation.

We Solve This

Common Water Heater Repair & Installation Problems We Fix

Not sure if your situation is serious? Here are the issues we handle most often — and how we fix them.

  • Problem

    No hot water at all

    Our Solution

    We diagnose and repair heating elements, gas valves, pilot assemblies, or replace the unit if necessary.

  • Problem

    Water not hot enough

    Our Solution

    Thermostat calibration, sediment flush, or element replacement restores full heating capacity.

  • Problem

    Rusty or discolored hot water

    Our Solution

    Anode rod replacement or full tank replacement if the tank has begun to corrode internally.

  • Problem

    Water heater making loud noises

    Our Solution

    Sediment flush to eliminate popping and rumbling; bearing or element check for other sounds.

Why Landmark Plumbing

The Right Team for Water Heater Repair & Installation

  • Licensed & Insured

    Every technician holds a valid Missouri plumbing license. We carry full liability and workers' compensation insurance.

  • On-Time Every Time

    We respect your schedule. Arrive on time, communicate clearly, and finish the job without unnecessary delays.

  • Transparent Pricing

    You get a written estimate before work starts. The price we quote is the price you pay — no hidden fees.

  • Satisfaction Guaranteed

    If you're not completely satisfied with our work, we return and make it right — no questions asked.

Got Questions?

Frequently Asked Questions About Water Heater Repair & Installation

No Hot Water? We're On the Way.

Same-day water heater repair and replacement throughout St. Louis and St. Charles County. Call now — we respond fast.

  • Free, no-obligation estimates
  • Same-day appointments available
  • 24/7 emergency response

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