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Last winter, the water pipe in my garage was apparently not emptied entirely and burst when the water froze. At least that is what I assume, because when I turned on water in spring, it sprayed out of the wall.

Aside from hiring a professional to fix it, what options do I have? I'll probably not be able to fix the pipe myself, but it would be good if I could at least figure out where it burst and if it is only in one place or several, so that I can understand what the damage is and get an estimate of the costs I'm facing.

If I can combine this with preventing the same problem from happening again, I'll be happy.

(if it matters, the pipe runs from the house, is apparently dug deep enough in the yard, but of course has to come up into the wall inside the garage. The water spray was in the corner where I strongly assume the pipe coming up, because it's right next to the sink and toilet.)

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You'll need to open the wall to figure out where it's broken and try to see if it's in multiple spots. Depending on the piping you have and exactly where it's busted, you might be able to fix it yourself with some SharkBite fittings and new pipe. Either way, you'll need to start by opening the wall and locating the break(s).

As for preventing this issue in the future, you'll need a way to drain the pipe. The normal way is to put a shutoff value and drain valve in the warm area (your house) on the pipe that goes to your garage and use that to blow out the pipes with air. In the warm area, you'll want the drain value on the side of the shutoff value that is closer to your garage. Then once your garage line is blown out, you can leave the drain valve open until you're ready to recharge the line. Be sure to blow out each fixture in the garage and put anti-feeze in the drains, toilet trap and some in the toilet tank as well.

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    I agree repairing the pipe may not be difficult even for a first time DIY depending on the type of pipe you will find out the type when you open the wall. – Ed Beal Jan 3 at 14:22

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