How to Winterize Plumbing in your home: 10 Expert Tips for a Worry-Free Winter Vacation

Planning to escape Michigan’s cold weather this winter? Before you lock up your house, it’s important to protect your plumbing system. Each year, frozen or burst pipes cause thousands of dollars in damage to Grand Rapids homes — especially when the homeowners are away.

At NSP Plumbing, we help homeowners winterize their plumbing systems every fall. Follow these 10 expert tips to make sure your home’s plumbing is safe, efficient, and ready for the season.

1. Turn Off the Main Water Supply Before You Leave

Before leaving for vacation, shut off your home’s main water valve to stop water from circulating through your pipes. This is the most effective way to avoid leaks or bursts while you’re gone.

How to do it:

  • Locate the main shutoff valve (usually near the water meter or where the main line enters your home).

     

  • Turn the handle clockwise to close it.

     

  • Once it’s off, open a faucet on the lowest level of your home to drain out any remaining water and relieve pressure.

     

Pro Tip: Label your main water shutoff with a durable tag so you can quickly find it in an emergency.

turning off main water supply to winterize plumbing

2. Winterize Plumbing Outdoors by Draining and Disconnecting Hoses

Your outdoor water lines are the first to freeze when temperatures drop. Before winter, make sure to:

  • Disconnect garden hoses and store them indoors.

  • Drain outdoor faucets by opening them after the shutoff valve is closed.

  • If your home has an irrigation or sprinkler system, follow the manufacturer’s draining procedure or hire a professional to blow out the lines.

Even a small amount of water left in outdoor plumbing can expand as it freezes, cracking pipes and fittings.

Disconnecting outdoor hoses to winterize plumbing and prevent frozen pipes

3. Keep the Heat On to Protect Pipes From Freezing

You might be tempted to turn off the heat while you’re gone, but maintaining a minimum indoor temperature of 55°F helps prevent frozen pipes in basements, crawl spaces, and exterior walls.

 

Extra Tip:
Open interior doors to help warm air circulate more evenly through the house. Heat that moves freely through hallways and cabinets can make a big difference when temperatures plunge.

Keeping home heated to 55 degrees helps winterize plumbing and prevent pipe freezing

4. Insulate Exposed Pipes for Better Plumbing Winterization

Pipes in unheated areas are most at risk of freezing. Focus on basements, attics, crawl spaces, garages, and utility rooms.

How to do it:

  • Use foam pipe sleeves or fiberglass insulation wrap.

     

  • For added protection, apply heat tape or heating cables that automatically turn on when temperatures fall below freezing.

     

  • Seal cracks or holes in nearby walls to block cold drafts.

     

Insulating your pipes is one of the most cost-effective ways to protect your plumbing — and a key step in winterizing home plumbing.

Insulating exposed pipes is an effective way to winterize plumbing

5. Open Cabinets and Interior Doors to Circulate Warm Air

Cabinets can trap cold air and prevent warmth from reaching your pipes. Opening them allows heated air to flow around your kitchen and bathroom plumbing.

This small step helps prevent freezing in pipes located along exterior walls — especially under kitchen sinks, which are often exposed to colder air.

Opening cabinets under sinks helps warm air circulate and winterize plumbing indoors

6. Check Your Sump Pump Before Winterizing Plumbing

Your sump pump protects your basement from flooding, but it’s only useful if it’s working correctly. Before leaving for your winter trip:

  • Pour a bucket of water into the sump pit and make sure the pump turns on and drains the water properly.

  • Clear any debris from the discharge line.

  • If your sump pump drains outside, make sure the line is insulated and directed away from your foundation to prevent freezing.

Having a professional inspection from NSP Plumbing before you leave ensures your pump is in top shape and your basement stays dry.

Checking sump pump function is an important step to winterize plumbing before vacation

7. Drain or Set Your Water Heater to Vacation Mode

If you’re shutting off your main water supply, drain your water heater to prevent internal corrosion or sediment buildup.

If you’ll be gone only a week or two:

  • Leave the tank full but set the thermostat to “Vacation” or “Low” mode to save energy.

If you’ll be away for an extended period:

  • Turn off power to the heater.

  • Connect a hose to the drain valve at the bottom of the tank and let the water empty into a floor drain.

This reduces wear on your water heater and prevents leaks while you’re away.

Image of tankless water heater for NSP Water Heater Service

8. Seal Air Leaks Near Pipes to Prevent Freezing

Even the best-insulated pipes can freeze if cold air seeps in around them.

Check these common spots:

  • Where pipes enter exterior walls.

  • Around dryer vents, foundation cracks, or crawl space openings.

Use caulk or expanding spray foam to seal gaps. This not only helps with plumbing winterization, but it can also improve your home’s energy efficiency.

9. Have a Neighbor Check In During Your Winter Vacation

Ask someone you trust to stop by your home every few days. They can:

  • Confirm that the heat is still working.

  • Check for leaks, drips, or frost on visible pipes.

  • Make sure the water heater and sump pump are operating properly.

Give them your contact info and the location of your main water shutoff, just in case.

10. Schedule a Professional Plumbing Winterization Service

The most reliable way to protect your home while you’re away is with a professional plumbing winterization service.

At NSP Plumbing, our licensed plumbers can:

  • Inspect your system for weak points or leaks.

  • Drain your water lines and outdoor plumbing.

  • Insulate pipes and test your sump pump.

  • Verify your water heater and shutoff valves are secure.

We’ll make sure your home’s plumbing system is safe from Michigan’s freezing temperatures — so you can enjoy your winter vacation without worry.

Protect Your Home While You’re Away

Whether you’re gone for a week or the whole winter, taking time to winterize your home plumbing system can save you thousands in potential repairs.

Need help preparing your plumbing for cold weather?

Call NSP Plumbing today or schedule your winterization service online.

We proudly serve Grand Rapids and surrounding West Michigan communities, offering expert plumbing care 24/7.

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