Note to readers: This post was updated on July 16, 2026 to update tankless water heater brands, rebate info, and add links to our current water heater comparison guides. We refreshed the details below so the advice reflects how we approach this work today.
If your old tank-style water heater is starting to leak, struggling to keep up with hot water demand, or just getting up in years, a tankless water heater is worth a serious look. Western Rooter & Plumbing has installed tankless systems across the San Gabriel Valley for years, and we’ve worked with most of the major brands, including Noritz, Rinnai, and Navien, enough to know what actually holds up over time.
How tankless is different
A conventional tank water heater keeps 40-50 gallons of water hot around the clock, whether you’re using it or not. A tankless unit heats water on demand as it flows through, so there’s no standby tank losing heat and no risk of running out of hot water mid-shower with a full house.
The real advantages
- Energy savings — no standby heat loss means lower gas or electric bills over the life of the unit
- Space — tankless units mount on a wall and free up the floor space a tank would take
- Endless hot water — no more running out mid-shower when the dishwasher and washing machine are also running
- Longer lifespan — a quality tankless unit can last 15-20 years versus 8-12 for a typical tank
- Rebates — many Energy Star-compliant tankless units qualify for utility rebates, and multi-unit buildings can often get an even larger rebate per unit
What to consider before switching
Tankless units cost more upfront than a tank replacement, and some homes need updated gas lines or venting to support one. If you have hard water, scale buildup inside the heat exchanger can shorten its life without regular flushing, so ask your plumber about a maintenance schedule when it’s installed. Read more on why hard water destroys water heaters faster in Pasadena.
Choosing the right unit
Sizing matters more than brand. A unit that’s undersized for your home will struggle when multiple fixtures run at once. We look at your home’s peak hot water demand, not just square footage, before recommending a model. See our comparison of tank vs. tankless water heaters for Pasadena homes and a real cost comparison for SGV homes if you’re still weighing the decision.
When to call a pro
If your current water heater is over 10 years old, showing rust at the base, or you’re simply tired of running out of hot water, it’s worth getting a quote on both a tank replacement and a tankless upgrade side by side. We offer free estimates and can walk you through tankless water heater installation options and what rebates you may qualify for. Give us a call at 626-448-6455.
