Edgetec Flexi-Flange Spa Bath Suction 192 lpm rated - Chrome

Edgetec spa bath suction face and wall fitting - chrome
Face Diameter - 100mm, height off spa bath wall -24mm
used on lanark spa baths and others
Used in conjunction with one of the Edgetec suction bodies sold separately

Chrome is a coating applied through electrolysis to a base material such as brass or plastic. These parts are chromed plastic

See images for removal of cover.
There is a raised/embossed hole in the outer ring of the cover that you can easily detect with your finger.
once identified, insert a thin 'tool' such as a pop rivet or nail through the embossed hole and push down to depress the locking lever.
At the same time rotate the cover 1/8 turn anti-clockwise. Then pull cover away from the fitting.
Installation is a reversal except there is no need to use the rivet. Ensure the locking lever engages and the cover cannot be unscrewed without aid of a tool.