Section 25-401 - Definitions(a) In this subtitle the following words have the meanings indicated.(b) "Apartment unit" means a single family housing unit that: (1) is one of multiple units within a building;(2) contains at least one full bath and one full kitchen; and(3) does not contain more than two toilets.(c) "Fixture unit" means the assigned value for a plumbing fixture or group of plumbing fixtures, as set forth in the Commission's plumbing and gas fitting regulations, that is standardized with a common lavatory having an assigned value of one based on its probable discharge into the drainage system or hydraulic demand on the water supply.(d) "New service" means: (1) a first time connection of a property to the Commission water or sewer system, including: (i) a direct connection of an improvement or building; or(ii) a connection of the improvement or building through an existing on-site system; or(2) a new connection or increased water meter size for a property previously or currently served by the Commission if the new connection or increased meter size is needed because of a change in the use of the property or an increase in demand for service at the property.(e) "Property" means an improvement or a building on a lot or parcel of land that contains plumbing fixtures.(f) "Toilet" means a water closet, as set forth in the Commission's plumbing and gas fitting regulations.