E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
E03C1/30—Devices to facilitate removing of obstructions in waste-pipes or sinks
E03C1/304—Devices to facilitate removing of obstructions in waste-pipes or sinks using fluid under pressure
E03C1/306—Devices to facilitate removing of obstructions in waste-pipes or sinks using fluid under pressure by means of a tube connected to the water mains