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If I had left my (inside bath room sink) dripping could it had prevented my (outside hose bib) 20 ft away & on same side of house from freezing up & busting.
I know freezing water expands and increases pressure that causes copper pipes to burst. But will inside faucets left dripping stop outside hose bibs from pressuring up and bursting with temps at 10 degrees.
No.
The pipes you are trying to protect need their own faucets to be dripping.
Another section of pipe and faucet dripping will not protect another section.
The dripping faucet lets warmer(than freezing) water to flow though the pipe. The dripping should be closer to a very small flow, than a drip.
Electric heat tapes are good for outside faucets, if you do not have a inside shutoff valve for that faucet, and leave that faucet open.
There are insulated faucet covers, such as this, that work in all but the coldest climates -- if there is sufficient heat leakage along the pipe and through the wall.
They're effective in my northern location, and more convenient than turning the inside shut-off and draining the standing water.
N.B. Leaving water trickling is not always effective, and outside, would leave a dangerous build-up of ice next to the house!
