C CHEMISTRY; METALLURGY
C02 TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2307/00 Location of water treatment or water treatment device
C02F2307/12 as part of household appliances such as dishwashers, laundry washing machines or vacuum cleaners