The niche front shall be Grade A exterior-type granite or marble according to the Marble Institute of America (1998), or travertine, bronze, tile mosaic, glass, lexan, or plexiglass.
Forming shells shall be installed for the mounting of all wet-niche underwater luminaires and shall be equipped with provisions for conduit entries ...
Forming shells shall be installed for the mounting of all wet-niche underwater luminaires and shall be equipped with provisions for conduit entries ...