# Winter Plumbing Tips for Arizona Homeowners — Even Mild Winters Can Cause Problems
When most people picture frozen pipes, they imagine homes buried in snow somewhere in Minnesota or Colorado. Here in the East Valley, our winters feel mild by comparison — sunny afternoons in the 60s, maybe a light jacket in the morning. But that false sense of security catches a lot of Mesa, Gilbert, and Chandler homeowners off guard every year.
The truth is, Arizona’s desert winters are unpredictable. Temperatures routinely dip into the low 30s overnight between December and February, and in some years we see hard freezes that push into the upper 20s. That’s more than enough to crack an exposed pipe, damage a hose bib, or put serious strain on your water heater. A few preventive steps now can save you hundreds — or thousands — in repairs before spring arrives.
Here’s what we recommend every East Valley homeowner do before and during cold snaps.
Understanding the Frozen Pipe Risk in Arizona
Most Arizona homes were built with the assumption that pipes would rarely, if ever, freeze. That means many of our plumbing systems are not as protected as homes built in colder climates. Pipes in exterior walls, garages, attics, and crawl spaces are especially vulnerable because there is minimal insulation between them and the cold air outside.
When temperatures drop below 32°F for an extended period — even just a few hours overnight — exposed pipes can freeze. When water freezes, it expands, and that expansion can crack or burst a pipe. The real damage often doesn’t show up until the pipe thaws and water starts flowing again. That can mean a flooded garage, a soaked wall cavity, or water pouring through a ceiling by morning.
The National Weather Service issues freeze warnings for the Phoenix metro area roughly 5–10 times per winter season. Don’t dismiss those alerts — they’re your cue to take action.
Insulating Exposed Pipes: The Most Important Step
If you have pipes running through your garage, along exterior walls, or under a manufactured home, insulating them is your single best defense against freeze damage.
Pipe insulation foam sleeves are inexpensive (usually $1–$3 per linear foot at any hardware store) and easy to install. They slip right over standard copper and PVC pipes and are secured with tape or zip ties. Focus on:
- Garage water lines — especially if your laundry room or water softener is in the garage
- Pipes in exterior walls near windows or in rooms that are rarely heated
- Lines running under the house in crawl spaces or on the shaded north side of the home
- Irrigation supply lines and backflow preventers
When a freeze warning is issued, you can also wrap vulnerable pipes in heat tape (also called pipe heating cable), which plugs into an outlet and keeps the pipe above freezing. This is especially useful for pipes that are difficult to permanently insulate.
Protecting Your Outdoor Hose Bibs
Hose bibs — the outdoor spigots where you connect garden hoses — are among the most commonly damaged fixtures during Arizona cold snaps. Standard hose bibs have a small amount of water sitting right at the exterior wall, and that’s enough to freeze and crack the fitting.
Before a freeze, always:
- Disconnect and drain any garden hoses — water trapped in a connected hose will back up into the bib and freeze
- Install a foam hose bib cover (also called a faucet cover), available at any hardware store for a few dollars
- If you have an older home, consider asking us about upgrading to frost-free sillcock hose bibs, which are designed to keep water inside the heated part of the wall
If you have a dedicated irrigation system, locate the shutoff valve and know how to turn it off quickly. Most Mesa homeowners can find this valve near the water meter at the front of the property.
Water Heater Strain in Cooler Weather
Your water heater works significantly harder in winter. The incoming groundwater temperature drops, which means your water heater has to raise the water temperature by more degrees to reach your set point. This added workload accelerates wear on heating elements, burner assemblies, and the tank itself.
Signs your water heater is struggling in cold weather:
- Takes longer than usual to deliver hot water
- Water is not as hot as it used to be
- You hear popping, rumbling, or banging from the tank (usually sediment buildup)
- The pilot light on a gas unit keeps going out
If your water heater is 8 years or older, winter is a good time to have it inspected. We see a spike in water heater failures every January and February as older units fail under the added load. A water heater inspection or tune-up from our team takes about an hour and can give you a clear picture of how much life your system has left.
Consider setting your water heater to 120°F — high enough for effective hot water delivery and sanitation, but not so high that you’re paying to overheat water you’ll just mix cold into anyway.
When to Drip Faucets in Arizona
The “drip your faucets during a freeze” advice is standard in colder climates, and it does apply here in Arizona — but with some nuance.
You should let faucets drip when:
- The forecast calls for temperatures at or below 28°F for 4+ hours overnight
- You have exposed pipes in unheated spaces (garage, attic, crawl space)
- You’re leaving town and won’t be home to monitor the situation
The gentle trickle of water keeps the water moving through the pipes, which makes it much harder to freeze. Focus on faucets connected to pipes that run through vulnerable areas — a bathroom on an exterior wall, or the kitchen sink on the north-facing side of the house.
You don’t need to drip every faucet in the house. One faucet per at-risk pipe run is usually sufficient. Even a trickle — a pencil-width stream — is enough to provide protection.
Signs of Winter Plumbing Damage
Even with precautions, problems happen. Know what to look for after a cold snap:
Low Water Pressure
A sudden drop in pressure at one or more fixtures can indicate a pipe has cracked or is partially frozen. Check your main shutoff valve first, then call a plumber if the pressure doesn’t normalize once temperatures rise.
Visible Moisture or Staining
Water stains on ceilings, walls, or floors that weren’t there before a freeze are a red flag. Even a slow leak inside a wall can cause significant mold and structural damage within days.
Unexplained Wet Spots in the Yard
A burst underground line can saturate the soil above it. If you notice soft, soggy ground near your irrigation system or water meter after a freeze, shut off your main water supply and call us.
No Water at All
If you turn on a faucet and get nothing — no water, no trickle — a pipe has likely frozen solid. Do not try to thaw it with an open flame. Use a hair dryer on low heat and work from the faucet back toward the cold section. If you can’t locate the freeze or it doesn’t clear, call a plumber immediately.
A Note for Chandler, Gilbert, and Mesa Homeowners
The East Valley sees some of the coldest nighttime temperatures in the Phoenix metro area due to elevation differences and the open desert to the east. Homeowners in older neighborhoods — particularly those with homes built before 1990 — are especially at risk because older plumbing materials like galvanized steel or original copper may already be brittle or corroded.
If your home is older and you’ve never had a plumbing inspection, a whole-home plumbing checkup is a smart investment before we hit another cold stretch.
We’re Ready When You Need Us
At One Call Plumbing Services, we serve Mesa, Gilbert, Chandler, and the entire East Valley with fast, reliable plumbing repairs. If you suspect freeze damage or just want peace of mind before the next cold snap, give us a call at 480-663-2255 or contact our team online. We offer same-day appointments and are here when it matters most.
Don’t wait until a small problem becomes a flooded house. A little prevention now goes a long way.