Before revision: Lead service line in Washington, DC A lead service line (LSL, also known as lead service pipe, and lead connection pipe) is a pipe made of lead which is used in potable water distribution to connect a water main to a user's premises.
After revision: Lead service line in Washington, D.C. A lead service line (LSL, also known as lead service pipe, and lead connection pipe) is a pipe made of lead which is used in potable water distribution to connect a water main to a user's premises.