Sanitary appliances are fittings used for collection and discharge of soil or waste matter. These appliances may be grouped under soil appliances and waste water appliances. Soil appliances are used for collection and discharge of excreta matter including water closet, urinal etc.
A sanitary appliance used for collection and discharge of water after use is called waste appliances and includes drinking water fountains, wash basin, kitchen sink, Bathtub etc. These appliances are generally made from vitreous chinaware and glazed fire clay sanitary ware. In some cases sink is made from marble stone or stainless steel.
At the time of purchase it should be checked that all exposed surface of sanitary ware is coated with an impervious non crazing, vitreous, glaze finish which is thoroughly fused with body and should possess an impervious surface. The glaze finished on sanitary ware is generally white but it may be finished in glaze of any color. It should have high gloss. The glaze should be of such thickness as gives uniform color and finish to surface. Its surface should not have wavy finish, warpage, discoloration, blisters or pinholes, bubbles etc. and these should not be visible to naked eye.