one skilled in the art that the present invention embodiments having a mounting member attached to a side of a liquid containment structure can be used with a module having a flange and that such use is within the spirit and scope of the invention as claimed for example module 120 shown in fig1 could be installed in a pool but rather than having the mounting member attached to the flange as shown in fig1 and 3 through 8 the mounting member could be an integral part of the side of the pool as shown in fig2 and 10 in the preceding figures the present invention is described with respect to a swimming pool however the present invention can be used with other recreational liquid containment structures such as an in ground swimming pool an aboveground swimming pool a jacuzzi a spa or a hot tub it should be readily apparent to one skilled in the art that the present invention is not limited to only these examples of recreational liquid containment structures and other examples are within the spirit and scope of the invention as claimed in the preceding figures the present invention is described with respect to a side of a swimming pool however in general the present invention can be applied to any surface of a liquid containment structure or to a flange arranged proximate any surface of a structure for example a bottom surface in the preceding figures the present invention is described with respect.