64 a 64 b openings 66 a and 68 a of locating rings 66 68 are dimensioned to receive threaded pipe 181 of basin module 170 as will be described in detail below a second mounting plate 80 is attached to column section 40 b of column 40 as best shown in fig2 mounting plate 80 provides a support surface for supporting pump 100 which is described in detail below a metallic mounting strap 82 is welded to the back side of mounting plate 80 mounting plate 80 is attached to column section 40 b of column 40 fastening means 84 e g bolt lock washer and nut secure mounting strap 82 to column section 40 b a third mounting plate 90 is attached to top end 44 b of column section 40 b as best shown in fig4 in the embodiment shown mounting plate 90 is welded to top end 44 b of column section 40 b mounting plate 90 provides a support surface for a power switch box 140 a faucet 150 and a shelf 14 all of which are described in further detail below a hole 96 is formed in mounting plate 90 to receive faucet 150 basin module 170 is generally comprised of a saddle 172 a mounting assembly a drain 250 and a sink body 12 saddle 172 is.