A flush valve is a mechanism used to flush a toilet or urinal. The valve and associated hardware are located within the toilet tank or in the body of the urinal. Most toilets have a lever or push button activator, which is used to operate the flush valve.
Photosensitivity (or sun sensitivity) is inflammation of the skin induced by the combination of sunlight and certain medications or substances.This causes redness (erythema) of the skin and may look similar to sunburn.hotosensitivity (or sun sensitivity) is inflammation of the skin induced by the combination of sunlight and certain medications or substances.
Nearly all psychiatric medications increase the body's sensitivity to the heat or sun. Photosensitivity is the result of drugs combining with proteins in the skin to form substances which react with direct light. Being in the sun for as little as 30 to 60 minutes can cause a variety of allergic skin rashes.