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.
In rare instances, the cartridge or ball valve on your single-handled faucet may be cracked or nicked, and that can also cause a leak. 1  Rocky Mountain Bathrooms: How To Find The Leak In Your Shower Or Bathtub.  Action Plumbing, Heating & Air Conditioning: Common Causes of a Leaking Faucet.