While Texas is famous for its sweltering summers, the winter months present a severe threat that many homeowners are unprepared for. In recent years, historic winter freezes have proven that sub-zero temperatures can plunge deep into the South, causing widespread utility failures and property damage.
Unlike homes in northern states, which are built with plumbing lines running through insulated basements, many Texas homes are built on concrete slabs with water lines running through uninsulated attics, crawlspaces, or exterior walls. When a severe winter freeze hits, standing water inside these pipes expands. The pressure exerted by freezing ice (up to 40,000 PSI) can easily split copper, PVC, and even PEX lines.
To protect your property from the cost and stress of a burst pipe, follow this comprehensive guide to winterizing your home's plumbing.
Why Pipes Burst: The Physics of Freezing Water
A common misconception is that pipes burst at the point where the ice clog forms. In reality, the rupture occurs due to downstream water pressure.
- The Process: When water inside a pipe freezes, it expands. As the ice blockage grows, it pushes liquid water down the pipe towards closed faucets. This traps the water between the ice clog and the faucet valve, creating immense hydrostatic pressure.
- The Break: Eventually, this pressure exceeds the strength of the pipe material, causing it to split. This usually happens in copper joints or thin-walled plastic lines. The break is often not noticed until the temperature rises and the ice melts, allowing pressurized water to flood your home.
Outdoor Winterization Steps: Protect Your Spigots
Outdoor plumbing is the most exposed to freezing temperatures and should be protected first:
- Disconnect All Garden Hoses: Leaving a hose connected traps water inside the spigot (outdoor faucet). When this water freezes, it expands back into the faucet body inside the wall, causing a burst. Disconnect, drain, and store all hoses in a garage or shed.
- Install Faucet Covers: Place insulated foam dome covers over all outdoor spigots. These covers trap heat escaping from the home's interior, keeping the faucet above freezing. If covers are unavailable, wrap faucets in layers of towels and plastic wrap, securing them with duct tape.
- Shut Off and Drain Outdoor Lines: If your home has a dedicated shut-off valve for outdoor hose bibs or irrigation systems, close it and open the outdoor faucets to drain the remaining water.
Indoor Winterization: Protecting Interior and Crawlspace Lines
During an arctic blast, take steps to keep warm air circulating around your indoor plumbing:
- Open Cabinet Doors: Open the vanity and cabinet doors under kitchen and bathroom sinks, particularly those located on exterior walls. This lets warm air from your heating system circulate around the pipes, keeping them above freezing.
- Drip Your Faucets: Let faucets connected to vulnerable pipes drip slowly. Running both hot and cold lines keeps water moving through the system, making it much more difficult for ice to freeze solid. The dripping also relieves hydrostatic pressure if a partial clog does form, preventing a pipe rupture.
- Maintain Home Temperature: Set your thermostat to at least 65°F (18°C), even if you plan to be away from home during the freeze. If you lose power, keep cabinet doors open and locate your main water shut-off.
The Most Critical Prep: Locate and Test Your Main Shut-off Valve
If a pipe does burst, your priority is to shut off the water supply immediately to contain the damage.
- Where is it? In Texas, the main shut-off is typically located near the street inside a plastic or concrete meter box (often in your front yard), or on the side of the home near the outdoor hose bib.
- Test it now: Open the meter box lid (watch for spiders or dirt) and locate the valve. Some meters require a specialized meter key or a set of heavy-duty pliers to turn the brass handle 90 degrees until the padlock holes align. Verify that the valve turns easily. If it is rusted shut, contact our team to repair or replace the shut-off before winter arrives.
Thawing Frozen Pipes Safely
If you turn on a faucet during a freeze and only get a few drips, your pipes are frozen.
- Keep the Faucet Open: As you thaw the pipe, the melting water needs a path to escape.
- Apply Safe Heat: Use a hairdryer, a space heater, or wrap the pipe in towels soaked in hot water. Start thawing near the faucet and work your way back towards the frozen section.
- NEVER Use an Open Flame: Do not use blowtorches, propane heaters, or open flames to thaw pipes. This presents a severe fire hazard, particularly in dry wood attics, and can melt PVC lines.
- Know when to call: If you cannot locate the freeze point, if the pipe is inaccessible, or if you notice a visible crack in the pipe, contact our emergency dispatch team immediately.
Trust TX Plumbing for Winterization Services
If you need help installing heat tape, insulating attic water lines, retrofitting outdoor valves, or repairing a winter pipe burst, contact TX Plumbing Company at 1-877-673-8504. Our licensed, local teams are available 24/7 to keep your home safe and dry through any storm.