Installing a tankless electric water heater in your ADU? You’ll need a properly sized 240V dedicated circuit to power it safely and pass inspection. At LA Pro Electrical, we specialize in tankless water heater wiring for ADUs, providing complete installation services with licensed electricians, premium materials, and full code compliance.
We handle the entire process—from panel to heater—so your system runs efficiently, safely, and is ready for city inspection the first time.
✅ What’s Included in Your Installation
Licensed, insured electrician assigned to your install date
240V dedicated circuit from panel to water heater (up to 50 ft included)
Dual or triple-pole breakers installed (based on heater specs)
Heavy-gauge wire and conduit rated for continuous load
Exterior disconnect (if required by code or city)
All materials included—no hidden costs
Full system testing after installation
Clean, professional worksite and walkthrough
Whether your unit requires one or more 240V lines, we size the wiring and breakers according to your manufacturer’s specs and local electrical code.
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💡 Typical Tankless Water Heater Electrical Requirements
Tankless water heaters require high-amperage 240V circuits, often needing multiple dedicated lines depending on brand and model.
| System Load | Breaker Size | Wire Gauge (AWG) | # of Circuits |
|---|---|---|---|
| 18–24 kW | 2× 40–50 amp | 8–6 AWG | 2 or more |
| 27–36 kW | 3× 50–60 amp | 6 AWG or larger | 3 or more |
We’ll review your panel’s capacity and configure circuits accordingly. If your current panel lacks space, we’ll quote a subpanel installation or main panel upgrade if needed.
Materials & Labor Included
| Item | Description | Included |
|---|---|---|
| 240V Breakers | Dual/triple-pole breakers | ✅ Yes |
| Electrical Wire | Up to 50 feet, sized per code | ✅ Yes |
| Disconnect (if needed) | Required for some exterior units | ✅ Yes |
| Conduit & Connectors | All fittings and weatherproofing | ✅ Yes |
| Labor & Testing | Full install by licensed electrician | ✅ Yes |
Inspection-Ready Work
We follow California Electrical Code and Los Angeles building standards for all tankless water heater wiring. All installations are:
Code-compliant and city-ready
Neatly routed and labeled
Ready for permit and inspection sign-off
Built to last with heat-rated, high-load components
Flat-Rate Pricing, No Surprises
Pricing starts at $999, including labor and materials for most standard installs. Multi-line systems or long-distance wiring may require a custom quote. Upload your panel and heater photos when booking for the most accurate estimate.
You’ll always know what you’re paying upfront—with no surprise fees.
Easy Online Booking – Start in Minutes
Choose your service online
Upload photos of your tankless unit and panel
Select your installation date
Pay only 10% to reserve your spot
We arrive and complete the job—usually same day
Why Homeowners & Builders Trust LA Pro Electrical
✅ In-house licensed electricians only
✅ 100% code-compliant & inspection-ready
✅ Transparent flat-rate pricing
✅ Fast scheduling – no waiting weeks
✅ Expert ADU experience in LA & beyond
✅ Satisfaction guaranteed
Get Your Tankless Water Heater Powered the Right Way
Need wiring for your tankless water heater in an ADU or home? Trust LA Pro Electrical for safe, reliable, and affordable 240V circuit installation.
Los Angeles CA areas we serve:
We proudly serve all neighborhoods in Los Angeles County. Common areas we service include:
- Agoura Hills
- Alhambra
- Arcadia
- Artesia
- Avalon
- Azusa
- Baldwin Park
- Bell
- Bell Gardens
- Bellflower
- Beverly Hills
- Bradbury
- Burbank
- Calabasas
- Carson
- Cerritos
- Claremont
- Commerce
- Compton
- Covina
- Cudahy
- Culver City
- Diamond Bar
- Downey
- Duarte
- El Monte
- El Segundo
- Gardena
- Glendale
- Glendora
- Hawaiian Gardens
- Hawthorne
- Hermosa Beach
- Hidden Hills
- Huntington Park
- Industry
- Inglewood
- Irwindale
- La Cañada Flintridge
- La Habra Heights
- La Mirada
- La Puente
- La Verne
- Lakewood
- Lancaster
- Lawndale
- Lomita
- Long Beach
- Los Angeles
- Lynwood
- Malibu
- Manhattan Beach
- Maywood
- Monrovia
- Montebello
- Monterey Park
- Norwalk
- Palmdale
- Palos Verdes Estates
- Paramount
- Pasadena
- Pico Rivera
- Pomona
- Rancho Palos Verdes
- Redondo Beach
- Rolling Hills
- Rolling Hills Estates
- Rosemead
- San Dimas
- San Fernando
- San Gabriel
- San Marino
- Santa Clarita
- Santa Fe Springs
- Santa Monica
- Sierra Madre
- Signal Hill
- South El Monte
- South Gate
- South Pasadena
- Temple City
- Torrance
- Vernon
- Walnut
- West Carson
- West Covina
- West Hollywood
- Westlake Village
- Whittier
