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 55/77 gpm min/max service flow rate 12 gpm backwash flow rate Space Required 49x24x78 (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 60/95 gpm min/max service flow rate 15 gpm backwash flow rate Space Required 58x30x85 (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 75/105 gpm min/max service flow rate 25 gpm backwash flow rate Space Required 73x39x92 (LxWxH)

36×72 resin tank 50×60 brine tank 20 cubic feet of high capacity resin 150 lbs 1/4×1/8 gravel support bed 350 lbs 1/2×1/4 gravel support bed 80/110 gpm min/max service flow rate 35 gpm backwash flow rate Space Required 82x42x93 (LxWxH)

42×72 resin tank 50×60 brine tank 30 cubic feet of high capacity resin 250 lbs 1/4×1/8 gravel support bed 450 lbs 1/2×1/4 gravel support bed 85/120 gpm min/max service flow rate 50 gpm backwash flow rate Space Required 96x50x96 (LxWxH)