Tankless Water Heater Installation in Katy, TX
Tony's Plumbing installs tankless water heaters in Katy for households that run more than one shower at a time. We install Rinnai, Navien, and Rheem, and we size gas for the heater plus ranges, dryers, and outdoor kitchens.

Reviewed by Tony's Plumbing licensed technicians · Master Plumber License #40815 · Last updated
What makes this page different: Katy installs are driven by simultaneous baths and grill islands, especially near Cinco Ranch and I-10 west.
Multi-bath Katy mornings
Katy households west of the Grand Parkway and along I-10 often have three or more baths. A tank that covered a smaller family runs out when two showers and a washer overlap before school.
Tankless installation in Katy is sized to that peak, using incoming water temperature in winter—not a mild-climate flow chart. Undersizing is how a new unit still feels lukewarm.
Outdoor kitchens sharing the gas meter
Grill islands and fire features around Cinco Ranch and other Katy villages sit on the same meter as the water heater. Adding tankless without recounting those BTUs leaves the heater or the grill short.
We plan a dedicated branch when the existing pipe cannot carry both. Fort Bend and Harris streets in Katy do not share one permit path; we file for the jurisdiction of the address.
Rinnai, Navien, and Rheem in Katy
We install and service Rinnai, Navien, and Rheem tankless units in Katy. The model follows gas input, whether you need condensing efficiency and a condensate drain, and where the vent can terminate near patios.
HOA walls that face a street may limit exterior mounts. We document placement before the unit is hung.
Permits on Fort Bend and Harris streets
A Katy mailing address can sit in more than one county. Gas and water-heater permits follow the inspector for that street, including pressure tests on new piping.
Call (832) 890-8449 to schedule tankless installation in Katy. If the gas service cannot support it, we will quote a Bradford White or Rheem tank instead of forcing the conversion.
FAQ
- Do you install tankless water heaters in Katy?
- Tony's Plumbing counts simultaneous showers and outdoor-kitchen gas before startup. Fort Bend and Harris addresses in Katy are permitted for the street you are on.
- Will tankless run out of hot water in a large Katy home?
- Endless hot water assumes the heater was sized for peak flow. We size to how your Katy household actually runs baths, not to a single-shower rating.
- What if Katy gas service cannot support tankless?
- An outdoor kitchen plus a tankless can exceed the meter. You will hear that before equipment is ordered, and you can stay on a storage tank.
