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.
Causes The causes of foaming are many. The most common include: Water contamination. Solids contamination. Depleted defoamant (possibly due to the use of excessively fine filtration and electrostatic separation technologies) Mechanical issues (causing excessive aeration of the fluid) Overfilling of the sump with splash- and bath-lubricated compartments