Allowing a steady cold water drip is a common method of pipe protection
If you've ever waked up on a below-zero morning to find that your pipes are frozen because you forgot to leave a cold water faucet dripping before you snuggled under your blankets on the preceding evening, try Robert Gilmore's clever solution. The Hayden, Idaho homesteader simply takes the washers out of two of his home's cold water taps each fall . . . and puts the discs back in place the following spring.