How to Winterize Outdoor Faucets Before the First Freeze

01Disconnect the hoses first, every time

The number-one cause of a burst outdoor faucet is a hose left attached over winter. A connected hose traps water against the faucet and inside the spigot. When that trapped water freezes, it expands, and because it cannot escape, it pushes the ice back into the pipe behind the wall, where the burst actually happens, often unseen until the spring thaw.

So before anything else, walk the house and disconnect every hose from every spigot. Drain the hoses, coil them, and store them somewhere they will not get brittle. This one step alone prevents the large majority of outdoor-faucet freeze failures, even on faucets that are otherwise unprotected. Do it the moment overnight lows start approaching the 20°F range.

02Shut the interior valve and drain the line

Most outdoor spigots have a dedicated shutoff valve on the interior side of the wall, often in the basement, crawl space, or a utility area near where the pipe exits to the outside. Trace the line back from the spigot and close that valve. With the supply shut, go back outside and open the spigot fully to let the water in the remaining stub drain out.

Many of these interior valves have a small bleeder cap, a little screw-off plug on the side. Open the spigot outside, then open the bleeder cap with a bucket underneath to drain the trapped water between the valve and the faucet. Leave the outside spigot open through the winter so any residual water has room to expand instead of bursting the pipe. This drain-down is what protects the line even in a deep freeze.

• ·Find and close the interior shutoff for the spigot
• ·Open the outside faucet fully to drain the stub
• ·Open the bleeder cap on the interior valve with a bucket below
• ·Leave the outside faucet open all winter for expansion room

03Foam covers and the frost-proof upgrade

An insulated foam faucet cover (a dome or pouch that slips over the spigot, $3 – $8 each) adds a layer of protection by trapping the small amount of heat conducting out through the wall. On its own a cover is not a substitute for disconnecting the hose and draining the line, but layered on top of those steps it is cheap insurance, especially on north-facing or wind-exposed spigots.

The durable fix is a frost-proof sillcock. Unlike a standard spigot, a frost-proof sillcock places the actual shutoff valve 6 to 12 inches back inside the heated wall, so when you close it the water stops deep inside where it stays warm, and the exposed section drains itself as long as no hose is attached. Upgrading from a standard spigot to a frost-proof sillcock is a modest job; the hose bib replacement cost page lays out what that swap runs and when it makes sense.

04Sprinkler blowout and the bigger freeze picture

If you have an in-ground irrigation system, the outdoor faucet is not the only exposed run. Irrigation lines sit shallow and hold water that will freeze and crack the heads and valves. A sprinkler blowout uses an air compressor to push the water out of every zone before winter; most homeowners hire it out for $75 – $150, since the right pressure matters and over-pressurizing damages the system.

Winterizing the spigots is one piece of keeping the whole house safe from a freeze. The faucet is the first thing to freeze, but the supply lines behind it are next, and our frozen pipes guide covers prevention for the rest of the plumbing. For the temperature math behind when all this becomes urgent, see what temperature do pipes freeze, which explains the 20°F threshold and the sustained-cold rule.