A good slop sink should be made to hold rather more than a pailful of slops, for preventing an overflow if a house-flannel should get over the outlet. It should be made of impervious strong material, so as not to be easily broken by the fall of a scrubbing brush or other hard object into it. There should not be any corners in which filth can accumulate. The sink should have a (lushing rim, and a flushing cistern attachment; the flushing pipe should be 1 1/4 in. or1 1/2 in. in diameter. The basin should have a trap close beneath it, with cross-l pars for keeping out anything that would choke it. The liars should be fixed, but easily removable for access to the trap for any purpose. As the rush of water down the waste-pipe violently expels the contained air, a ventilation pipe, not less in size than the waste-pipe, should be fixed. When fixed in private houses, the waste-pipes should be disconnected from the drains, the same as other sinks, but in hospitals and similar buildings they should be treated as soil pipes. Slop sinks down which hot water passes should not be connected to soil pipes.

Hospital slop sinks require to be specially constructed with attached arrangements for cleansing bed pans with the least possible amount of handling.