16×65 resin tank 24×50 brine tank 4 cubic feet of high capacity resin 75 lbs 1/4×1/8 gravel support bed 20/41 gpm min/max service flow rate 7 gpm backwash flow rate Space Required 44x24x75 (LxWxH)

18×65 resin tank 24×50 brine tank 5 cubic feet of high capacity resin 100 lbs 1/4×1/8 gravel support bed 25/53 gpm min/max service flow rate 9 gpm backwash flow rate Space Required 46x24x78 (LxWxH)

21×62 resin tank 24×50 brine tank 7 cubic feet of high capacity resin 50 lbs 1/4×1/8 gravel support bed 100 lbs 1/2×1/4 gravel support bed 35/60 gpm min/max service flow rate 12 gpm backwash flow rate Space Required 49x24x74 (LxWxH)

24×72 resin tank 30×48 brine tank 10 cubic feet of high capacity resin 100 lbs 1/4×1/8 gravel support bed 150 lbs 1/2×1/4 gravel support bed 40/66 gpm min/max service flow rate 15 gpm backwash flow rate Space Required 58x30x81 (LxWxH)

30×72 resin tank 39×48 brine tank 15 cubic feet of high capacity resin 100 lbs 1/4×1/8 gravel support bed 250 lbs 1/2×1/4 gravel support bed 45/66 gpm min/max service flow rate 25 gpm backwash flow rate Space Required 73x39x88 (LxWxH)