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.
Sensitivity to Light. information on nutrition, causes, harmful drugs, lifestyle. Light Sensitivity (photophobia or photosensivity) is a condition where your eyes are overly sensitive to light, possibly causing pain, tearing and discomfort. When light enters the eyes, it causes a chemical reaction in the back of the eyes.