Protecting Your Tankless Water Heater In Freezing Weather

January 24, 2026

 Protecting Your Tankless Heater This Winter: Important Information You Should Know


Modern homes all over the PNW are equipped with tankless water heaters—they’re efficient, compact, and provide endless hot water. However, when the temperature drops below freezing, these high-tech systems are surprisingly vulnerable. Unlike traditional tanks that hold a large volume of heated water, tankless units rely on small, intricate copper pipes that can freeze and burst in a matter of hours.

If you want to avoid a mid-winter cold shower, here is how to winterize your tankless unit.


1. The Power of "Freeze Protection"

Most modern indoor and outdoor units come with built-in freeze protection. This system uses electric heaters to keep the internal components just above freezing.


  • Crucial Step: Never unplug your unit in the winter. If the power goes out, the freeze protection goes out with it.
  • Pro Tip: If you live in an area prone to power outages, consider a Battery Backup (UPS) specifically for your water heater to keep those internal heaters running.


2. The "Slow Drip" Method

If a hard freeze is coming and you’re worried about the pipes leading to the unit, use the oldest trick in the book: the slow drip.


  • Find the faucet furthest from the water heater.
  • Turn on the hot water tap just enough to get a thin, steady stream (about 1/8 of an inch wide).
  • Why it works: Moving water is much harder to freeze than standing water. This also relieves pressure if ice does begin to form.


3. Insulate Your External Pipes

The unit itself might be protected, but the pipes carrying water in and out are often exposed. Use high-quality foam pipe insulation to wrap every inch of exposed copper or PEX piping.

For extreme climates, you might even consider heat tape—an electric cable that wraps around the pipe and generates heat when temperatures dip.


4. Guard Against Backdraft

This is the "silent killer" of indoor tankless units. When it’s freezing outside, cold air can travel down the vent pipe and reach the heat exchanger inside the unit.


  • Ensure your vent terminations have flappers or cowls that prevent wind from blowing directly into the system.
  • If your unit is in a garage or basement, make sure the room itself stays above freezing.


5. What to do During a Power Outage

If the power fails and the temperature is sub-zero, your internal freeze protection is gone. In this emergency scenario, you must drain the unit:


  1. Turn off the gas and power.
  2. Close the cold water inlet and hot water outlet valves.
  3. Open the pressure relief valve and the drain ports (usually found on the service valves) to let all the water out of the machine.


As always, you can count on Maxwell Plumbing for

any tankless water heater maintenance, repairs, or replacement.

Call 360-209-4048 or book your FREE ESTIMATE on our website www.maxwellplumbingPNW.com


What Separates Maxwell Plumbing

At Maxwell Plumbing, our legacy of excellence spans four generations, ensuring that every job is handled with the utmost care and expertise. Our commitment to quality service means we treat every home as if it were our own, providing reliable solutions that neighbors trust. Whether it's a minor repair or a major installation, our licensed team is dedicated to delivering top-notch plumbing services that stand the test of time.
360-209-4048
August 14, 2026
Should I Use Yelp or Thumbtack to Find a Plumber? The short answer: You can. But you may be overpaying for the process of finding one—and you might not be finding the best plumber for the job. As a plumbing company, we have a different view of lead-generation platforms like Yelp and Thumbtack than most homeowners ever get to see. We've used them. We've paid for leads. We've seen how the system works from the contractor's side. And we've also been called into homes where we're looking at plumbing work that makes us wonder: Who thought this was finished? Our issue isn't that every plumber advertising on these platforms is bad. There are undoubtedly good plumbers using them. Our issue is with what the system rewards. You're Not Necessarily Being Matched With the "Best" Plumber When you submit a plumbing problem to a lead-generation service, it can feel like you're asking the platform: "Find me a good plumber." But that's not really what's happening. These companies are middlemen. They aren't coming into your house. They aren't looking at your plumbing. They don't know whether your water heater was installed correctly, whether the plumber took shortcuts behind the wall, or whether the repair will still be working five years from now. Yet they're helping determine which companies get put in front of you. And there's an entire financial system operating behind that introduction. Your Plumbing Problem Can Become a Lead Someone Has to Buy One thing many homeowners don't realize is that contractors may be paying for the opportunity to get your job. And purchasing a lead doesn't mean getting the job. A plumbing company might pay for your lead, respond, prepare an estimate and follow up—only to have you choose someone else. Then they buy another lead. And another. Only a percentage turn into actual customers. That means contractors using this model aren't just paying to acquire the jobs they win. They're also absorbing the cost of all the leads they don't win. From a business standpoint, it can become a hamster wheel: Buy a lead. Respond immediately. Try to win one job. Lose or win. Repeat. Those costs eventually have to be accounted for somewhere. The Race to Respond First Isn't Necessarily Good for the Homeowner Technology and AI have made this even more interesting. When several contractors are competing for one person's plumbing job, there's tremendous incentive to respond fast . But think about that for a second. What does responding to an internet inquiry in 30 seconds tell you about someone's ability to install a water heater? Not much. The best plumber for your house isn't necessarily the company with the fastest automated response. Plumbing should work almost the opposite way. Understand the problem. Diagnose it correctly. Determine the proper solution. Clearly define the scope. Then price the work. When the system rewards first response, fastest close and lowest initial price, we're not convinced that's the best system for finding someone to work on your home. We've Tried Yelp Ourselves This isn't an opinion we've formed entirely from the outside. At Maxwell Plumbing, we've tried Yelp as a source of new customers. For us, the quality of the leads was subpar compared with the customers who find us through referrals, word of mouth and recommendations on social media and other local platforms. There's also a fundamental difference in those two customers. One says: "I submitted my problem online and you're one of the companies that responded." The other says: "My neighbor told me you're the plumber I should call." We'll take the second introduction all day long. That's how we want to grow our company. Look at the Work, Not Just the Stars Before hiring a plumber, spend ten minutes actually investigating the company. Go to their website. Are you looking at photographs of their actual plumbing work , employees and trucks? Or does the website look like a collection of generic stock photos and clip art? Then look at their social media. Do they show real jobs? Can you see the quality of their finished installations? Do they talk intelligently about plumbing problems and explain what they're doing? Then read their Google reviews—not just the overall rating. Read what customers actually say about the experience. Also pay attention to what the company seems most interested in selling you. Financing and maintenance plans aren't inherently bad. They can be useful tools for homeowners. But if everything seems designed to push you into a financing program, membership or sales funnel, we'd want to understand why. Look for evidence that you're hiring plumbers who care about plumbing. Be Careful With the Price That's Too Good to Be True We understand homeowners getting multiple bids. You should want good value. But there's a difference between competitive pricing and suspiciously cheap pricing. We've seen companies come in extremely low to land a project, only for the price to increase as the job progresses. Others can hit the low number by cutting corners. Neither is particularly helpful to the homeowner. For larger projects, we put significant time into our estimates. We want to describe the scope of work and clearly identify what's included and what's excluded. Sometimes that means we won't be the least expensive bid. That's okay. Our goal is to put together the most competitive price we can while still completing the job to our standards. A detailed $8,000 proposal and a vague $7,000 proposal aren't necessarily $1,000 apart. You first need to determine whether you're actually buying the same thing. So How Would a Plumber Find a Plumber? If we moved somewhere tomorrow, didn't know any plumbers and needed someone to work on our own house, here's what we'd do. We'd ask people. We'd start with neighbors or ask for recommendations in a local Facebook group. Then we'd pay attention to the names that repeatedly came up and narrow the list down to two or three companies. Next, we'd investigate them. We'd look through their websites. We'd read their Google reviews. We'd look at photos of their work and social media accounts. Then we'd contact the strongest one or two. And we'd pay attention to how they communicate. Are they responsive? Professional? Do they listen? Do they answer questions? Do they seem interested in understanding the problem—or just closing the sale? That's a much better vetting process, in our opinion, than submitting your information and seeing which company wins the race to respond. Four Generations Taught Us Something About Getting Customers We are owned by a 4th Generation Journeyman plumber. Aaron was fortunate enough to know and work alongside his great-grandfather, grandfather and father, who had their own respective plumbing companies. From an early age, he watched them solve difficult plumbing problems for people. But he learned something else too. He watched his father create what we like to think of as a vortex of happy customers. Do good work. Treat people well. Be there when they need you. Eventually, those customers don't search for a plumber every time something breaks. They already have one. And they tell their friends. Aaron also intentionally built experience outside the family businesses. He worked for large plumbing retailers, a nationwide plumbing franchise, a larger mechanical plumbing company and smaller plumbing shops. Each experience showed him different parts of the industry. But we never found the exact combination of service, value, craftsmanship and skill we thought a plumbing company should offer. So we built Maxwell Plumbing around it. We're intentionally not following some of the formulas becoming common in the plumbing industry. We'd rather earn a customer who calls us for the next 20 years than constantly pay a middleman for another opportunity to win one job. So, Should You Use Yelp or Thumbtack to Find a Plumber? You can. But understand what you're buying into. A lead-generation platform can introduce you to a plumbing company. What it can't do is replace your own judgment about whether that company deserves to work on your home. And you may ultimately be paying—indirectly—for an expensive system built around contractors purchasing and competing for individual leads. Our advice is simpler. Ask your neighbors. Ask your local community. Find the two or three plumbers people genuinely recommend. Then do your homework. Look at their actual work. Read their reviews. Look at how they present themselves. Talk to them. Pay attention to how they communicate. And don't automatically hire the company that responds first or throws out the lowest number. Find a plumber you hope you'll never have to search for again. Maxwell Plumbing is based in Camas, WA and is proud to serve our neighbors in the surrounding Vancouver, WA to Portland, OR metro area. Call us today at 360-209-4048 or book a free estimate today.
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