Turn off the water supply before going on vacation
Turn off the water at the main shut off
Water damage from undetected plumbing leaks will quickly ruin ceilings, floors and walls, leading to repair bills in the thousands. This is especially true if you're away on vacation. Yes, such a leak is unlikely, but insurance companies report hundreds of these incidents every year. Look for the main valve near the water meter and turn it clockwise to close it. If it's stuck, leaks or doesn't turn on again, hire a plumber to replace it. The ice maker in your refrigerator may freeze up while you're gone, so shut it off too or thaw it with a hair dryer when you return.
If your main water shut off valve ever has to be replaced you can do it yourself! Here's how.
Use metal tubing rather than plastic for ice maker supply lines
Use copper or braided stainless steel tubing
If you've had mice in your home, use a copper (type L) or braided stainless steel line rather than a plastic supply line for the ice maker in your refrigerator. Mice like to run behind refrigerators and occasionally chew holes in plastic lines, causing a leak that can ruin floors and ceilings before you detect it. Plastic tubes also can harden over time and crack. Find metal ice maker lines at home centers and wherever appliances are sold.