You only need a very small, steady trickle to drip faucets safely in freezing weather.

How much to drip faucets

For most homes, a slow drip is enough:

  • Aim for about one drop every few seconds , just before it turns into a thin, unbroken stream.
  • In more extreme cold (near 0°F or below), you can increase to a tiny pencil‑lead–sized stream for extra safety.

A simple way to check:
If the water is clearly moving but still looks “gentle” rather than like you turned the tap on, you’re in the right zone.

Which faucets to drip

You don’t always need to drip everything in the house.

  • Prioritize the faucet farthest from the water meter or main shutoff, so water keeps moving through the longest stretch of pipe.
  • Also drip faucets on exterior walls or in unheated areas (garages, basements, crawl spaces).
  • If your plumbing is old or has frozen before, dripping more than one vulnerable faucet is safer.

Hot and cold lines:

  • In very cold snaps, many plumbers suggest letting both hot and cold trickle a bit to keep both lines moving, especially if they run through outside walls.

When to drip (temperature guide)

There’s no universal rule, but a common guideline is:

  • Start dripping when the forecast shows below 20°F for several hours (around 3+ hours).
  • In milder climates with pipes that aren’t well protected, people sometimes start closer to 25°F–28°F if temps will stay below freezing for a long time.

If your house is newer and well insulated, you may only need to drip in low teens or single digits , but older, poorly insulated homes may need dripping sooner.

How much water and cost

At the proper slow-drip rate, the water and cost are usually quite low.

  • One slow-dripping faucet typically uses around 1 gallon per hour or less.
  • Many U.S. extension services estimate the cost at about a couple of cents per night per faucet , depending on local water rates.

Compared with burst pipes—often 1,000 to 5,000 dollars or more in repairs—dripping is considered very cheap insurance.

Quick “recipe” for dripping faucets

  1. Check the forecast: if temps will stay under 20°F for hours , plan to drip.
  1. Choose faucets: start with the one farthest from the meter and those on exterior/unheated walls.
  1. Open cabinets under sinks on exterior walls so warm indoor air can reach the pipes.
  1. Turn the tap until you see a steady drip (drop every few seconds) ; increase to a small stream if temps are extremely low or your pipes have frozen before.
  1. Keep dripping until temperatures stay above freezing again.

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    “Wondering how much to drip faucets in a freeze? Learn the ideal drip rate, when to start, which faucets to run, and why the cost is just cents per night.”

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