Generally, they can occur from one of the following causes: 1  Infection. 2  Environmental exposure. 3  Malignancy. 4  Occupational exposure. 5  Collagen vascular disease (an inflammatory condition of the body including the lung) 6  Drugs. 7  Idiopathic (unknown causes)
01-08-2006, 09:34 AM. Check to see if you have the tap marker (handle) turned down to far. The jam nut (lever collar) for holding the marker straight should not be touching the lever bonnet. The bonnet is the nut that holds everything to the faucet. If it is touching, this will cause your sticking Faucet.
The causes of rusting. 1  Tube 1 â water and air. 2  Tube 2 â water but no air (it is removed during boiling and the oil prevents any extra from dissolving in the water and reaching the nail) 3  Tube 3 â water, air and salt.  Tube 4 â air, no water (the calcium chloride removes the water from the air and the bung prevents any extra from entering.)