Plumbing Work by Contractors

Generally, permits are not required for the replacement of existing plumbing fixtures, except for water heaters and testable backflow devices.

The following plumbing work may require a permit:

• Water, drainage and vent piping above grade that will not be concealed
• First time installation of plumbing fixtures on new or existing rough-ins
• Installation of non-testable double check valve backflow devices
• Gasfitting
• Installation or replacement of water heaters
• Installation of water piping and meter rack associated with WSSC meter settings
• Replacement or repair of water or sewer services
• Any other work not specifically allowed by WSSC regulations

Questions regarding plumbing work should be referred to the WSSC Service Applications and Records Section at 301-206-4003.

Applying
For applicable forms, visit the Forms and Checklists page.