Persons who own an existing single family dwelling or conventional townhouse unit are allowed, by regulation, to perform certain plumbing work without a permit. Homeowners may also perform certain plumbing work that requires a plumbing permit, subject to specific limitations. Generally, permits are not required for the replacement of existing plumbing fixtures, except water heaters, and testable backflow devices.
The following plumbing work may require a permit:
a) Water, drainage and vent piping above grade that will not be concealed;
b) First time installation of plumbing fixtures on new or existing rough-ins; and
c) Installation of non-testable double check valve backflow devices.
e) Installation or replacement of water heaters;
f ) Installation of water piping and meter rack associated with WSSC meter settings;
g) Replacement or repair of water or sewer services; and
h) Any other work not specifically allowed by WSSC regulation.
Any questions regarding plumbing work by homeowners should be referred to the WSSC Service Applications and Records Section at (301) 206–4003.
For applicable forms visit Forms and Checklists.