Tankless Water Heater Installation in Los Angeles
Endless Hot Water, Lower Energy Bills, and Modern Efficiency
Running out of hot water is frustrating, especially when your family needs it most. With professional tankless water heater installation, you’ll never have to worry about cold showers or waiting for a tank to refill again. At Over Under Plumbing, we install both gas and electric tankless systems designed to save space, reduce energy costs, and provide endless hot water on demand.
If you’ve been searching for “tankless water heater installation near me” or want to understand the tankless water heater cost, you’re in the right place. Our licensed plumbers make the process simple and efficient, from helping you choose the right model to installing it safely and correctly.

Why Tankless Water Heater Installation Matters
Traditional water heaters rely on a large storage tank, usually between 40 and 80 gallons, that keeps water hot around the clock. That means the heater is constantly working, even when no one is home, which wastes energy and often drives utility bills higher. And once that tank is emptied after a few showers or loads of laundry, you’re stuck waiting for it to refill and reheat.
A tankless water heater, sometimes called a waterless tank heater, works in an entirely different way. Instead of storing hot water, it heats water instantly as it passes through the system. The result is:
Endless Supply of Hot Water – Multiple showers, the dishwasher, and the washing machine can all run at the same time without running cold.
Energy Efficiency – Since tankless units heat water only when you need it, you save significantly on monthly utility bills compared to tank heaters.
Compact Design – Mounted on a wall, tankless systems free up valuable floor space, making them perfect for smaller Los Angeles homes or apartments.
Longer Lifespan – With proper maintenance, tankless water heaters typically last 15–20 years, almost twice as long as a traditional tank system.
Cleaner Water – Because there’s no storage tank collecting sediment or rust, your water stays fresher and safer for your household.
Investing in tankless water heater installation isn’t just about modern convenience. It’s about reducing wasted energy, lowering long-term costs, and ensuring your family always has reliable access to hot water.
Benefits of Choosing Over Under Plumbing for Tankless Installation
Installing a tankless water heater is not a DIY project. It requires careful gas, water, and venting connections to meet California plumbing codes. Here’s why Los Angeles homeowners choose us for their tankless hot water heater installation:
- Licensed and Insured Plumbers: Every installation is performed by certified professionals who follow state plumbing regulations to the letter.
- Fast, Efficient Service: In most cases, we can remove your old tank and install a new tankless system the very same day.
- Transparent Pricing: Before work begins, we provide a clear, detailed estimate of your tankless water heater installation cost, so you know exactly what to expect.
- Versatile Expertise: We service and install both tank and tankless units, so we can help you make the right choice for your household.
- Guaranteed Workmanship: Every project comes with our 30-day workmanship guarantee, giving you confidence that the job was done right.
- Emergency Availability: Hot water emergencies can’t wait. When you need us, we’re ready to respond quickly to restore your home’s comfort.
Choosing Over Under Plumbing means getting more than just an installation — it means investing in professional service, long-lasting performance, and the peace of knowing your home is in capable hands.
How Our Tankless Water Heater Installation Process Works
Upgrading to a tankless system shouldn’t be a stressful experience. At Over Under Plumbing, we’ve built a process that’s straightforward, efficient, and designed to get your hot water running without unnecessary delays.
Here’s how we handle every tankless water heater installation:
1. Consultation & Inspection – We evaluate your current water heating system, check your home’s gas and water lines, and recommend the best tankless unit to fit your household’s needs.
2. Upfront Estimate – Before any work begins, you’ll receive a clear breakdown of the tankless water heater installation cost.
3. Removal of Old Unit – If you’re replacing a tank heater, we safely disconnect, remove, and haul it away for you
4. Professional Installation – Our licensed plumbers connect the new system to your gas, water, and venting lines, following California safety codes.
5. Testing & Adjustments – We thoroughly test your new unit to ensure it delivers steady, endless hot water. We’ll also fine-tune the settings for efficiency and explain how to use it.
6. Cleanup – We leave your home tidy and ready to enjoy with hot water flowing the very same day.
With our step-by-step approach, you’ll always know what’s happening and can feel confident your tankless system is installed correctly and safely.
Frequently Asked Questions About Tankless Water Heater Installation
How much does a tankless water heater installation cost?
The cost depends on the size of your home, your water usage, and the model you select. Gas line upgrades or venting adjustments may add to the price. At Over Under Plumbing, we provide a detailed, upfront estimate before work begins so you know exactly what to expect.
Is tankless really more efficient than a tank water heater?
Yes. Traditional heaters constantly heat 40–80 gallons of water, even when you don’t need it. Tankless systems heat water only on demand, reducing wasted energy and lowering monthly utility bills. Many Los Angeles homeowners see long-term savings that outweigh the higher initial investment.
Can you replace my old tank water heater with tankless?
Absolutely. We handle the full conversion process, including removing your old tank and installing new connections.
How long does tankless installation take?
Most installations are completed in a single day. If you’re converting from a tank system, additional gas or plumbing adjustments may be needed, but we still aim to restore hot water as quickly as possible.
Can a tankless water heater provide enough hot water for my entire home?
Absolutely. When sized correctly, tankless units can run multiple showers, appliances, and sinks at once without running cold. Our team will help you select the right model to match your household’s hot water demands.
What kind of maintenance does a tankless water heater need?
Tankless systems should be flushed once a year to prevent mineral buildup, especially in areas with hard water like Los Angeles. Regular maintenance extends the unit’s lifespan and ensures consistent efficiency. Our plumbers can provide ongoing service to keep your system running like new.
Call Over Under Plumbing for Tankless Water Heater Installation
If you’re ready for endless hot water and lower energy bills, Over Under Plumbing is here to help. Our licensed team provides professional tankless water heater installation in Los Angeles, with fast service and transparent pricing. Call at 818-937-0060 or click below to schedule your installation today.

$200OFF
40 Gallon Water Heater Replacement
Expires September 30, 2025
Cannot be combined with any other offers or discounts. The coupon must be presented at the time of scheduling. Not valid for trip charge or diagnostic fee. Valid on standard pricing only. Redeemable for one-time use per home.

$139
Water Heater Inspection & Flush Out
Get Your Water Heater Inspected And Sediment Out To Keep Your Water Heater Running Smoothly!
For Water Heaters Located In The Garage or Outside
Cannot be combined with any other offers or discounts. The coupon must be presented at the time of scheduling. Not valid for trip charge or diagnostic fee. Valid on standard pricing only. Redeemable for one-time use per home.