Tankless Water Heater Installation
Upgrade to endless hot water with a tankless system. Energy-efficient, space-saving, and built to last.
Professional Tankless Water Heater Installation in Orange County
Tankless water heaters deliver hot water on demand — no storage tank, no standby energy loss, and no running out of hot water. KCB Plumbing is a factory-certified installer for Rinnai, Noritz, and Navien, the three leading tankless water heater brands. We help Orange County homeowners transition from traditional tank heaters to modern, energy-efficient tankless systems.
A properly sized and installed tankless water heater can reduce water heating costs by 24-34% compared to a conventional tank heater (according to the U.S. Department of Energy). They last 15-20+ years — nearly twice as long as tank models — and take up a fraction of the space, often mounting on an exterior wall or in a small utility closet.
Tankless installation is more involved than a simple tank swap. It often requires upgrading the gas line (for gas models), adding dedicated venting, and potentially upgrading the electrical panel (for electric models). Our team handles all of these requirements, ensuring your system is properly sized for your home and installed to manufacturer specifications.
Need Tankless Water Heater Installation?
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(714) 894-6520Our Process
How It Works
Home Assessment
We evaluate your hot water demand, gas line capacity, venting options, and installation location to determine the right tankless system.
System Selection
Based on your needs, we recommend the ideal unit — considering flow rate, efficiency, and budget.
Infrastructure Prep
If needed, we upgrade your gas line, install new venting, and prepare the mounting location.
Installation
The tankless unit is mounted, connected to gas/water/power, and the venting system is completed.
Commissioning
We start the system, calibrate the temperature, run all hot water fixtures simultaneously to verify performance, and walk you through operation.
Why Choose KCB for Tankless Water Heater Installation
- Upfront flat-rate pricing — you approve before we start
- Licensed (#604044), insured, and bonded
- 99.9% on-time guarantee
- 4.9 stars across 50+ Google reviews
- 27+ years serving Orange County
- Workmanship guarantee on all repairs and installations
What Affects Pricing
We provide transparent, upfront pricing before any work begins. Here are the factors that affect the cost of tankless water heater installation:
- Tankless unit brand and model (Rinnai, Noritz, Navien)
- Gas line upgrade requirements
- Venting type and installation complexity
- Electrical work (for electric models or ignition systems)
- Removal and disposal of existing water heater
Common Questions
Tankless Water Heater Installation FAQ
How much does tankless water heater installation cost?
A complete tankless installation typically ranges from $3,500 to $6,000, including the unit, gas line upgrade, venting, and installation labor. The exact cost depends on the unit selected and the scope of infrastructure work needed. We provide detailed upfront pricing after our home assessment.
Can a tankless water heater really supply the whole house?
Yes, when properly sized. A single high-capacity tankless unit can supply 2-3 simultaneous hot water demands (for example, a shower and a dishwasher running at the same time). For larger homes with 4+ bathrooms, we may recommend a larger unit or a two-unit configuration.
What maintenance does a tankless water heater need?
Annual descaling (flushing with vinegar) is essential, especially in Orange County where water hardness ranges from 15-25 grains per gallon. We also inspect the burner, check for error codes, and clean the inlet filter. Regular maintenance prevents scale buildup that reduces efficiency and lifespan.
Is a gas or electric tankless better?
Gas tankless heaters provide higher flow rates and are better suited for whole-home use. Electric tankless models are smaller and less expensive but have lower flow rates, making them better for single-point applications. Most Orange County homes benefit from a gas tankless system.
Will I need to upgrade my gas line?
Often yes. Tankless water heaters require a larger gas supply (typically 3/4" to 1" gas line) than standard tank heaters. We assess your existing gas line during our home evaluation and include any necessary upgrades in our quote.
Tankless Water Heater Installation Throughout Orange County
We provide tankless water heater installation services across all of Orange County. Click your city to learn about local plumbing needs:
Other Tankless & Water Heater Services Services
Water Heater Repair & Maintenance
All brands and types. We diagnose issues quickly and restore your hot water with lasting repairs.
Learn more →Water Heater Replacement & Installation
Professional installation of traditional tank water heaters. Energy-efficient options to fit your home and budget.
Learn more →Tankless Water Heater Repair & Flush
Factory-certified specialists for Rinnai, Noritz, and Navien. Annual flush and diagnostic services to prevent scale buildup and maintain peak performance.
Learn more →Related Services
Explore other plumbing services that complement tankless water heater installation.
Residential Plumbing
Complete residential plumbing services from new construction to everyday repairs. We handle everything so your home runs smoothly.
View services →Drain Cleaning
Professional drain cleaning that goes beyond the surface. We clear blockages and keep your drains flowing for the long term.
View services →Leak Detection & Repair
Hidden leaks waste water and cause damage. Our advanced detection finds leaks fast, and our repairs are built to last.
View services →Need Tankless Water Heater Installation?
Call us for a free over-the-phone estimate. We'll get your plumbing taken care of right.