Call us today!
(262) 229-5632
Request Service
Commercial water heaters work harder, fail faster, and cost more to replace than residential units. Restaurants, multi-family properties, office buildings, and industrial facilities all need reliable hot water, and when the system fails, you typically need it back online same-day.
Doro Plumbing services commercial water heaters across southeast Wisconsin, including emergency repair, scheduled maintenance, and full replacement. We work with all major commercial brands and configurations.
Commercial tank water heaters – 50 to 500+ gallon gas, electric, and oil-fired units. We handle Bradford White, A.O. Smith, Rheem, State, and other major commercial brands.
Commercial tankless systems – Rinnai, Navien, Noritz, and other commercial-grade tankless units. Repair, maintenance, and full replacement.
Indirect water heaters – tank water heaters fed by a boiler, common in office buildings and apartment buildings.
Hybrid heat pump systems – increasingly common for energy-efficient commercial applications.
Booster systems – for restaurants and commercial kitchens needing 180°F+ for sanitization.
Recirculation systems – the pumps and lines that keep hot water at every fixture without long waits.
Failed flame sensor or thermocouple on gas units – most common service call.
Failed igniter on power-vent or direct-vent units – quick fix when parts are on the truck.
Sediment buildup in tanks fed by hard water without proper softening – dramatically reduces capacity and efficiency, requires flushing or replacement.
Failed gas valve – more expensive but a clear repair-or-replace decision based on tank age.
Burner assembly issues – usually serviceable, sometimes requires partial replacement.
Recirculation pump failures – cause cold water at distant fixtures.
Mixing valve failures – cause inconsistent temperatures or scalding risk.
Failed expansion tanks – cause T&P valve discharge, sometimes mistaken for tank failure.
When a commercial unit needs replacement, the decision tree is more complicated than residential:
Capacity sizing – has your usage changed since the original install? Many properties are oversized or undersized after years of operational changes.
Fuel source – gas, electric, propane, oil. Some properties benefit from changing fuel source during replacement.
Tank vs tankless – depends on demand profile. Tankless makes sense for properties with intermittent usage and steady moderate demand. Tank still wins for high-volume burst applications like restaurant dish lines.
Efficiency standards – current commercial efficiency standards may require an upgrade to a higher-efficiency unit.
Venting – existing venting may not work for a more efficient or larger unit.
Code compliance – we make sure the replacement meets current Wisconsin code, including expansion tanks, T&P discharge tubes, drain pans, and seismic strapping where applicable.
We provide detailed written replacement quotes that show 2-3 viable options with pros and cons, so you can make an informed decision.
Most commercial water heaters benefit from annual maintenance:
This is included in our preventive maintenance contracts for commercial properties, or we can schedule it as a one-off service.
Doro Plumbing · (262) 229-5632 · Hartford, WI
Other services we offer that often go hand-in-hand with this one.
We offer this service across Hartford and the surrounding southeast Wisconsin communities.