Should I Leave Faucet Dripping?

When It Makes Sense

• Good fit: You live in an older home with exposed copper or PVC pipes in an unheated basement, and the forecast predicts prolonged sub‑zero temperatures (below 20 °F / –6 °C) for several days. In this scenario, a slow drip can keep water moving and reduce the chance of freezing.
• Good fit: You are away on a short vacation during a cold snap and have no reliable smart‑home water‑shutoff system. A controlled drip on a faucet that feeds the most vulnerable pipe section can give you peace of mind without having to leave the house.

When You Should Avoid It

• Warning sign: Your water utility bills are already high or you are on a restricted water supply. Adding a continuous drip can significantly increase usage, and the cost may outweigh the risk of a pipe burst, especially if the pipes are insulated or the home is heated.
• Warning sign: You have modern, well‑insulated plumbing, a whole‑house heating system, or a frost‑proof faucet design. In such cases the drip may be unnecessary, and the extra water could create slip hazards or waste.

Pros and Cons

Pros

• Maintains a small flow that prevents water from freezing solid, reducing the likelihood of pipe rupture and costly water damage.
• Simple and inexpensive to implement—just turn the tap to a slow drip, no special equipment required.

Cons

• Increases water consumption, leading to higher utility bills and potential environmental impact.
• May mask deeper plumbing issues (e.g., inadequate insulation) that should be addressed for long‑term resilience.

Decision Checklist

• Is the outside temperature expected to stay below the freezing point for more than 24‑48 hours?
• Are any of your water‑carrying pipes exposed, uninsulated, or located in unheated spaces?
• Do you have an alternative protection method (e.g., pipe insulation, heat tape, thermostat‑controlled heat) that could be more water‑efficient?

Alternatives to Consider

Rather than relying on a drip, you can improve pipe resilience with insulation sleeves, heat tape, or thermostatically‑controlled pipe heating cables. Sealing gaps in the building envelope prevents cold air from reaching pipe walls. If you have a smart home system, you can install a remote‑controlled water‑shutoff valve that automatically stops flow if a freeze sensor detects a problem. In some municipalities, low‑flow automatic frost‑prevention devices are offered as a service.

Final Recommendation

If you have vulnerable, uninsulated pipes and expect a prolonged freeze, a slow drip is a practical, low‑tech safeguard. However, if your home is well‑heated, pipes are insulated, or you can invest in heat‑tape or insulation, those options are generally more water‑efficient and address the root cause of freezing. Always weigh the added water cost against the potential damage, and consult a licensed plumber if you are unsure whether your plumbing needs extra protection.