22 32 00 Domestic Water Filtration Equipment
22 32 26.16 Domestic-Water Multimedia Sand Filters
22 32 13 Domestic-Water Bag-Type Filters 22 32 16 Domestic-Water Freestanding Cartridge Filters 22 32 19 Domestic-Water Off-Floor Cartridge Filters 22 32 23 Domestic-Water Carbon Filters 22 32 26 Domestic-Water Sand Filters 22 32 26.13 Domestic-Water Circulating Sand Filters 22 32 26.16 Domestic-Water Multimedia Sand Filters 22 32 26.19 Domestic-Water Greensand Filters