surface 313 the internal divider 306 extends from an upper edge 319 downwardly to a lower edge 318 the arrangement of internal dividers 306 308 and 310 form internal chambers 350 351 352 and 353 in the middle channeled portion 30 chambers 350 352 and 353 are adapted to receive resin beads chamber 351 serves as a salt receiving tank as in previous embodiments a bottom portion 400 is comprised of a top surface 405 a front wall 402 a first side wall 403 and a second side wall 404 opposite the first side wall 403 the top surface 405 further includes a peripheral mating surface 406 and internal mating surfaces 407 and 408 projecting through the top surface 405 of the bottom portion 400 is an inlet port 413 a filtration sieve 412 preferably covers the inlet port 413 the top surface 405 also includes an outlet port 411 that is also preferentially covered by a filtration sieve 410 the front wall 402 further includes a selector valve 416 that controls the routing of fluids within the bottom portion 400 the internal details of the bottom portion 400 will be described in detail later the first side wall 403 includes a discharge port 415 adapted to fluidly connect to a wastewater disposal system the second side wall 404 includes a conditioned water supply.