Replacement Cartridges for Sloan Waterfree Urinals. The New Sloan Waterless Urinal Cartridge Preserves our Natural Resources and saves costs. There are four primary functions of the cartridge system. First, the cartridge acts as a funnel, allowing liquid from the bowl to flow into the cartridge. Second, the cartridge holds the sealant liquid. As liquid waste enters the cartridge, the sealant liquid creates a barrier between the waste and open air, thus eliminating all odors. Third, the cartridge acts as a filter for uric sediment. Much of the sediment that can cause drainage pipe corrosion is trapped at the bottom of the cartridge. Fourth, the cartridge allows the remaining waste to be freely disposed of down the drain. Sloan offers a selection of liquid and foam soaps, urinal screens, hand sanitizer, fragrance bars and cartridges for Sloan Waterfree Urinals.