A water line (or water service line) is the pipe connecting a building to the water main in the street, delivering drinking water to individual properties. Water lines typically run from the main under the street, across the boulevard, and into buildings. Ownership and maintenance responsibility often split at the property line—municipalities maintain the portion in the right-of-way while property owners are responsible for lines on private property. Older water lines made of lead, galvanized steel, or other materials may require replacement for health or reliability reasons. Water line breaks can cause property damage and service interruptions. Line size affects water pressure and flow capacity. Water meters are often located where service lines enter buildings, measuring consumption for billing purposes.