How to Thaw Frozen Pipes: A Step-by-Step Checklist

Even when outdoor temperatures start to drop, people can typically rely on cozier conditions in their homes. So, it’s all the more frustrating when winter manages to slip inside and cause trouble. A particularly frustrating problem is when the pipes of your plumbing system freeze up. Handling frozen pipes can range from inconvenient to a widespread, costly mess. 

Many people prefer to call their plumber to take care of frozen pipes, and that’s never a bad idea. But you can also thaw them out yourself with just a few items from your house. To help you resolve this irritating plumbing problem, here’s a step-by-step guide for thawing frozen pipes. 

Step 1: Locate the Frozen Pipes 

The first and sometimes most time-consuming step is locating the frozen pipes. Turning on all your faucets may help you narrow down likely locations. If one faucet isn’t running, you can follow those specific plumbing lines and hopefully reach the frozen pipes. The pipes themselves might not be obvious to spot unless ice is visibly covering them. 

Instead, you can move your hands along the plumbing until you feel a sudden drop in temperature. Once you’ve found where the plumbing is coldest, you’ve probably found the frozen pipes. 

This method won’t work if every faucet isn’t running. You’ll need to check the main water line at this point as it’s the source of your home’s water supply. Each set of plumbing lines will gradually lead back to the water main. You’ll likely find yours in the basement or crawlspace. But if your home doesn’t have either of those things, try near the water heater or in the garage next. If you still can’t find it, go and find your home’s water meter on an exterior wall, as the main line can often be found on the other side. 

Step 2: Flush Your Plumbing System 

After verifying the pipes are frozen, turn off the main water supply. You can’t thaw the pipes with ice cold water on the inside, so you’ll also want to run every faucet if you haven’t already. This flushes the leftover water from the plumbing. Toilets will need to be flushed as well. 

Once the plumbing is drained of water, it’s time to begin the thawing process. Gather a few things before you begin: 

• A source of heat: This can be a hair dryer, a heat lamp, a heating pad or even just a bucket of hot water. 
• Some towels or cloths: Spare rags can help apply heat onto the frozen pipes. Or, if the pipes have broken, they can help you mop up. 

Step 3: Use Slow, Even Heat 

You shouldn’t heat up the pipes too fast, as that could damage your plumbing. Depending on your heat source, start at the edges of the frozen area. This keeps the process slow and consistent. Also, do your best to heat the pipes closest to the nearest kitchen or bathroom faucet. If any steam or water is produced by the heating process, it’ll head in that direction. 

Gently inch your way along the pipe, heating sections a bit at a time. Some homeowners will also turn up their thermostats, using the warmer air to evenly thaw all the pipes silmultaneously. As long as this is done slowly, it shouldn’t be a problem. With some luck, you’ll have successfully thawed your frozen pipes. But there’s one more step to complete. 

Step 4: Reopen the Water Main and Check for Leaks 

Return to the water main. Open the supply line, but only a little. This delivers enough water to check for leaks without making a mess. A leak ought to be fairly obvious to spot, and you should shut the water main off again if you do. At this point, it’s usually best to contact a plumber. They’ll have the tools and experience to resolve the damage, including replacing the broken pipes. 

If there’s not a leak, however, you can open the main water line the rest of the way before getting to all the faucets. 

Frozen Pipe FAQ 

Sometimes thawing out frozen pipes is a little more complex. Let’s talk about some of the most likely complications and what you can do to work around them. 

How long should it take to drain a frozen pipe? 

30 to 45 minutes is a good average, with more serious icing requiring added time. Don’t try to speed the process up with more heat as this could damage the plumbing and make the problem worse. 

What should I do if a pipe bursts or leaks? 

Without the correct tools and experience, it’s best to call a trusted plumber in San Antonio. Not only can they repair things more quickly and effectively, but they’ll have a better chance of noticing if other plumbing problems are nearby. 

How can I reach frozen pipes if they’re behind walls? 

A lot of your plumbing is installed behind walls, making them somewhat tricky to thaw out. Heating the closest accessible area might work, or you could try heating the section of the wall closest to the frozen pipes. Heat lamps and your thermostat will be the best options. If these don’t work, you might have to remove a section of the wall to get close enough to begin the thawing process. 

How to Prevent Pipes from Freezing 

The ideal way to thaw frozen pipes is to stop them from icing over in the first place. Pipes closest to unheated spaces or the exterior of your home are at the most risk. It’s not impossible for other pipes to freeze over, but this is less common as they’re usually close to insulation or between the floors of your home where it’s warm. 

Here are some things you can do to minimize the risk of pipes freezing: 

1. Keep your home warmer than 55 degrees: You’ll almost certainly prefer warmer temperatures than this, but 55 degrees or more is a good rule of thumb if you won’t be home. 

2. Insulate your pipes with electric pipe heat tape or insulation wrap: These materials keep pipes warm, significantly reducing the risk they’ll freeze over. 

3. Keep a small amount of water trickling through the plumbing: Flowing water is much more difficult to freeze than still water. You’ll want to do this with every faucet, and your water bill shouldn’t spike. 

4. Open cabinets and other doors to ensure even heat distribution: Closed doors and cabinets are quite good at keeping heat out. Leave these open in serious cold to keep warm air moving freely. 

If you stick to these steps, you’ll either stop pipes from freezing or have a straightforward way of thawing them out. If you’d prefer to leave the work to a professional, call your nearest plumber in San Antonio. They’ll make sure your plumbing is taken care of safely.