Plumbing fitting cover cap retention

A retention system for holding and mounting a cover cap to a plumbing fitting having a tubular terminal that projects at an opening through a bath or shower wall, and including said cap, comprising

• a) a retainer ring fitting on said tubular terminal and tightenable toward said wall,
• b) a series of retention cams on said ring and space about a longitudinal axis defined by the ring, there being gaps between successive cams, and there being retention shoulders on the cams,
• c) said retention shoulders facing in directions toward said wall, for retaining holders on the cover cap, after said holders have been passed longitudinally through said gaps and after the cap has been then rotated to cause said holders to slidably engage the cams and became wedges against said retention shoulders,
• d) and a positioner carried by said cap and projecting to locally engage grooving associated with said tubular terminal.

The method of pressure testing a plumbing fitting having a tubular terminal that projects at an opening through a wall, that includes

• i) providing and connecting a pressure test cap to said terminal to engage an annular seal between the cap and at an end face of the tubular terminal, thereby to seal off said tubular terminal,
• ii) applying internal fluid pressure to the fitting to determine if any fitting leakage exists,
• iii) removing said pressure test cap from the terminal,
• iv) subsequently providing a cover cap onto said tubular terminal to allow fluid leakage through the cover cap,
• v) and thereafter providing and locating a positioner or holder to project through the cover cap and into local engagement with grooving associated with said tubular terminal.