Full tank marker

An indicating device for a pressurized tank containing a valve having a head for opening and closing said valve, said device comprising:

• a. a body portion having a top end and spaced apart bottom end with a peripheral surface therebetween,
• b. indicia means on said top end of said body portion to selectively indicate the amount of fluid in said tank,
• c. gripping means on said peripheral surface to facilitate mounting and removal of said body portion from the valve head,
• d. enclosing means extending vertically in said body portion upwardly from said bottom end, said enclosing means including a cavity having a pair of vertically extending spaced apart cavity walls adapted to receive therebetween the valve head, such that vertical mounting and removal of said body portion on the valve head by said gripping means is obtainable,
• e. retaining means connected to at least one of said cavity walls and extending within said cavity and adapted for releasably securing by frictional engagement said body portion to the valve head thereby requiring a force applied to said gripping means for mounting and removal of the device from a valve head,
• f. alignment means on said top end so as to permit the user to orient said cavity walls in the proper direction for utilization of said enclosing means relative to the valve head,
• g. said indicia means includes the word "FULL", and said alignment means includes a line parallel to said word,
• h. an axial bore extending from said bottom end and terminating at said cavity and adapted to receive a portion of the valve therein, and
• i. locking means operatively associated with said body portion for engaging the valve head so as to prevent accidental removal thereof.