Today my Deal of the Day special is a ROHL, Octagonal Concealed Thermostatic TrimAny non-vitreous chinaA term applied to plumbing fixtures that are comprised of ceramic materials, fired at a high temperature to form a nonporous body with exposed surfaces, and coated with ceramic glazeA glossy, water-resistant, colored finish surface that protects all nonporous vitreous china plumbing fixtures. fused to the body. . . . → Read More: ROHL Perrin & Rowe Octagonal Thermostatic TrimAny non-vitreous china toilet components, with the exception of the seat. Examples include the ballcockThe mechanism that controls the flow of water into a gravity-operated toilet tank. The ballcock is controlled by the float mechanism floating in the water in the tank. When the toilet is flushed, the float drops and opens the ballcock, allowing water to enter the tank and/or bowlA water-containing receptor that receives liquid and solid body waste; two general bowl classifications are round-front and elongated.. The float rises as the water level in the tank is restored, and shuts off the ballcock when the tank is completely filled. Also referred to as a float valve., bolt caps and trip lever. in Satin Nickel