An outdoor kitchen sink can be damaged if used during freezing temperatures unless it is properly winterized. If water is left in the pipes, faucet, or drain lines when temperatures drop below freezing, it can freeze, expand, and even cause pipes or fittings to burst—leading to costly repairs. To avoid this, it's essential to drain all water lines connected to the sink before winter and, if possible, blow out the lines with compressed air to remove any residual moisture.