Top 10 Winter Plumbing Problems in Pennsylvania Homes
Cold Pennsylvania winters can be hard on your home’s plumbing. Freezing temperatures, snow, and ice all increase the risk of leaks, burst pipes, clogged drains, and water heater failures. Understanding the most common winter plumbing problems — and how to prevent them — can save you from emergency calls and costly water damage.
At John Shelton Plumbing, we help homeowners in Lower Burrell, New Kensington, Natrona Heights, Freeport, and Murrysville, and surrounding Alle-Kiski Valley areas prepare their homes for winter with preventative inspections, repairs, and upgrades.
Why Winter Is Tough on Your Plumbing
When temperatures drop, water inside pipes can cool quickly, contract, and sometimes freeze. As ice expands, it puts pressure on joints, fittings, and even sturdy copper or PEX lines. At the same time, heavier household use during the holidays can stress aging water heaters, drains, and sewer lines.
Without preparation, that combination can lead to:
- Frozen or burst water lines
- Backed-up drains and sewers
- Water heater failures
- Gas line and appliance issues
- Hidden leaks that only show up when things thaw
The good news is that many winter plumbing issues are preventable with routine maintenance and a few smart upgrades.
10 Common Winter Plumbing Problems (and How to Prevent Them)
1. Frozen Outdoor Hose Bibs
Leaving hoses attached or failing to shut off exterior valves can trap water in the line. When it freezes, pipes can crack behind walls or inside the foundation.
Prevention: Disconnect all hoses, drain exterior lines, and shut off and bleed outdoor hose bibs before the first hard freeze.
2. Frozen Indoor Pipes
Pipes in unheated basements, crawl spaces, or exterior walls are especially vulnerable to freezing. A frozen pipe can burst and cause significant water damage when it thaws.
Prevention: Insulate exposed pipes, seal drafts, keep interior doors open for airflow, and maintain a consistent indoor temperature.
3. Low Water Pressure in Winter
Partially frozen lines, sediment buildup, or older piping can lead to low water pressure during cold weather, especially on upper floors.
Prevention: Have a professional inspect for restrictions or consider a water pressure booster system if your home regularly struggles with weak flow.
4. Water Heater Strain and Failure
Cold incoming water and higher demand during winter make your water heater work harder. Older units may struggle to keep up, deliver lukewarm water, or fail completely.
Prevention: Schedule a pre-winter water heater inspection, flush sediment, check the anode rod, and consider a mixing valve or upgrade if the unit is near the end of its lifespan.
5. Clogged Kitchen Drains
Holiday cooking often leads to more grease, food scraps, and fat going down the sink. In cold weather, these materials harden faster and cling to the inside of pipes.
Prevention: Avoid pouring grease down the drain, use strainers, and run hot water while using the disposal. If clogs become frequent, consider a professional cleaning or hydro jetting service.
6. Sewer Backups After Snowmelt
Heavy snow followed by rapid thawing can overwhelm older sewer lines, especially if roots, cracks, or bellies already exist in the piping.
Prevention: Have your sewer line inspected with a camera and ask about trenchless pipelining if your line is aging or has a history of problems.
7. Sump Pump Failures
Winter storms and snowmelt can cause basements to take on water. If your sump pump fails or the discharge line freezes, water can back up into the home.
Prevention: Test the pump regularly, clean the pit, and make sure the discharge line is clear and protected from freezing.
8. Gas Line and Fireplace Issues
Gas fireplaces and heaters see heavier use in winter. If gas lines or connections are aging or improperly installed, they can pose a serious safety risk.
Prevention: Have gas lines and appliances inspected by a certified professional. Never attempt DIY gas work.
9. Leaky Shut-Off Valves
Old shut-off valves at toilets, sinks, and appliances may start leaking when used after long periods of inactivity, such as just before holiday gatherings.
Prevention: Test valves ahead of time and replace any that stick, drip, or fail to fully shut off.
10. Hidden Leaks in Crawl Spaces and Basements
Small leaks behind walls or in crawl spaces may go unnoticed until a freeze-thaw cycle worsens the damage. Left unchecked, they can lead to mold, structural issues, and higher water bills.
Prevention: Schedule a winter plumbing inspection, watch for unexplained spikes in water usage, and investigate any musty smells or damp spots quickly.
When to Call a Professional Plumber
Some winter plumbing maintenance can be handled by homeowners, but certain warning signs call for a professional. Acting early often saves money and protects your home from larger damage.
Contact a licensed plumber if you notice:
- No water or significantly reduced flow in one part of the home
- Frozen pipes or visible frost on exposed lines
- Slow drains, gurgling toilets, or sewer odors
- Water stains on ceilings, walls, or in the basement
- Unusual noises from your water heater or boiler
Proactive service before or during winter is one of the best ways to avoid emergency calls, protect your property value, and keep your family comfortable all season long.