| Tank Dim. (Inches) | Tank Diameter Sq. Ft. of bed area | Tank Volume Full Cu. Ft. | Tank Volume 50% Free Board Cu. Ft. | Resin Bed Depth Inches | Free Board Depth Inches | Backwash Sq. Ft. Bed Area at 4.5 GPM at 5.0 GPM | Kilo Grains Exchange Resin at 30,000 Gr. Per Cu. Ft. | NaCI Req. Per Regen. at 15 Per Cu. Ft. | Kilo Grains Exchange Resin at 24,000 Gr. Per Cu. Ft. | NaCI Req. Per Regen. at 8.5 Per Cu. Ft. | Kilo Grains Exchange Resin at 20,000 Gr. Per Cu. Ft. | NaCI Req. Per Regen. at 6 Per Cu. Ft. | |
| 6 x 13 | 0.20 | 0.2 | 0.13 | 8.7 | 4.3 | .9 | 1.0 | 4.0 | 2.0 | 3.10 | 1.1 | 2.6 | 0.8 |
| 6 x 18 | 0.20 | 0.3 | 0.20 | 12.0 | 6.0 | .9 | 1.0 | 6.0 | 3.0 | 4.80 | 1.7 | 4.0 | 1.2 |
| 6 x 35 | 0.20 | 0.6 | 0.40 | 23.3 | 11.7 | .9 | 1.0 | 12.0 | 6.0 | 9.60 | 3.4 | 8.0 | 2.4 |
| 7 x 24 | 0.27 | 0.5 | 0.33 | 16.0 | 8.0 | 1.2 | 1.35 | 10.0 | 5.0 | 7.90 | 2.8 | 6.6 | 2.0 |
| 7 x 30 | 0.27 | 0.6 | 0.40 | 20.0 | 10.0 | 1.2 | 1.35 | 12.0 | 6.0 | 9.60 | 3.4 | 8.0 | 2.4 |
| 7 x 35 | 0.27 | 0.8 | 0.53 | 23.3 | 11.7 | 1.2 | 1.35 | 16.0 | 8.0 | 12.70 | 4.5 | 10.6 | 3.2 |
| 7 x 40 | 0.27 | 0.9 | 0.60 | 26.7 | 13.3 | 1.2 | 1.35 | 18.0 | 9.0 | 14.40 | 5.1 | 12.0 | 3.6 |
| 7 x 44 | 0.27 | 1.0 | 0.66 | 29.3 | 14.7 | 1.2 | 1.35 | 20.0 | 10.0 | 15.80 | 5.6 | 13.2 | 4.0 |
| 8 x 17 | 0.35 | 0.4 | 0.26 | 11.3 | 5.7 | 1.6 | 1.75 | 8.0 | 4.0 | 6.24 | 2.2 | 5.2 | 1.6 |
| 8 x 24 | 0.35 | 0.6 | 0.40 | 16.0 | 8.0 | 1.6 | 1.75 | 12.0 | 6.0 | 9.60 | 3.4 | 8.0 | 2.4 |
| 8 x 30 | 0.35 | 0.8 | 0.53 | 20.0 | 10.0 | 1.6 | 1.75 | 16.0 | 8.0 | 12.70 | 4.5 | 10.6 | 3.2 |
| 8 x 35 | 0.35 | 0.9 | 0.60 | 23.3 | 11.7 | 1.6 | 1.75 | 18.0 | 9.0 | 14.40 | 5.1 | 12.0 | 3.6 |
| 8 x 40 | 0.35 | 1.1 | 0.73 | 26.7 | 13.3 | 1.6 | 1.75 | 22.0 | 11.0 | 17.50 | 6.2 | 14.6 | 4.4 |
| 8 x 44 | 0.35 | 1.2 | 0.80 | 29.3 | 14.7 | 1.6 | 1.75 | 24.0 | 12.0 | 19.20 | 6.8 | 16.0 | 4.8 |
| 9 x 35 | 0.44 | 1.2 | 0.80 | 23.3 | 11.7 | 2.0 | 2.2 | 24.0 | 12.0 | 19.20 | 6.8 | 16.0 | 4.8 |
| 9 x 40 | 0.44 | 1.4 | 0.93 | 26.7 | 13.3 | 2.0 | 2.2 | 28.0 | 14.0 | 22.30 | 7.9 | 18.6 | 5.6 |
| 9 x 48 | 0.44 | 1.7 | 1.13 | 32.0 | 16.0 | 2.0 | 2.2 | 34.0 | 17.0 | 27.10 | 9.6 | 22.6 | 6.8 |
| 10 x 19 | 0.54 | 0.7 | 0.46 | 12.7 | 6.3 | 2.43 | 2.7 | 14.0 | 7.0 | 11.00 | 3.9 | 9.2 | 2.8 |
| 10 x 30 | 0.54 | 1.2 | 0.80 | 20.0 | 10.0 | 2.43 | 2.7 | 24.0 | 12.0 | 19.2 | 6.8 | 16.0 | 4.8 |
| 10 x 35 | 0.54 | 1.4 | 0.93 | 23.3 | 11.7 | 2.43 | 2.7 | 28.0 | 14.0 | 22.30 | 7.9 | 18.6 | 5.6 |
| 10 x 40 | 0.54 | 1.6 | 1.07 | 26.7 | 13.3 | 2.43 | 2.7 | 32.0 | 16.0 | 25.70 | 9.1 | 21.4 | 6.4 |
| 10 x 42 | 0.54 | 1.7 | 1.13 | 28.0 | 14.0 | 2.43 | 2.7 | 34.0 | 17.0 | 27.10 | 9.6 | 22.6 | 6.8 |
| 10 x 44 | 0.54 | 1.8 | 1.20 | 29.3 | 14.7 | 2.43 | 2.7 | 36.0 | 18.0 | 28.80 | 10.2 | 24.0 | 7.2 |
| 10 x 47 | 0.54 | 1.9 | 1.26 | 31.3 | 15.7 | 2.43 | 2.7 | 38.0 | 19.0 | 30.20 | 10.7 | 25.2 | 7.6 |
| 10 x 54 | 0.54 | 2.2 | 1.46 | 36.0 | 18.0 | 2.43 | 2.7 | 44.0 | 22.0 | 35.00 | 12.4 | 29.2 | 8.8 |
| 12 x 48 | 0.78 | 3.1 | 2.06 | 32.0 | 16.0 | 3.51 | 3.9 | 62.0 | 31.0 | 49.40 | 17.5 | 41.2 | 12.4 |
| 13 x 54 | 0.92 | 3.7 | 2.46 | 36.0 | 18.0 | 4.14 | 4.6 | 74.0 | 37.0 | 59.00 | 20.9 | 49.2 | 14.8 |
| 14 x 65 | 1.07 | 5.3 | 3.53 | 43.3 | 21.7 | 4.82 | 5.35 | 106.0 | 53.0 | 84.70 | 30.0 | 70.6 | 21.2 |
| 16 x 65 | 1.40 | 6.4 | 4.26 | 43.3 | 21.7 | 6.30 | 7.0 | 128.0 | 64.0 | 102.20 | 36.2 | 85.2 | 25.6 |
| 21 x 62 | 2.40 | 11.0 | 7.33 | 41.3 | 20.7 | 10.80 | 12.00 | 220.0 | 111.0 | 175.90 | 62.3 | 146.6 | 44.0 |
| 24 x 71 | 3.14 | 16.0 | 10.60 | 47.3 | 23.7 | 14.13 | 15.70 | 318.0 | 159.0 | 254.40 | 91.1 | 212.0 | 63.6 |
| 30 x 72 | 4.90 | 26.0 | 17.30 | 48.0 | 24.0 | 22.05 | 24.50 | 519.0 | 259.5 | 415.20 | 147.1 | 346.0 | 103.8 |
| 36 x 72 | 7.07 | 36.1 | 24.10 | 48.0 | 24.0 | 31.82 | 35.35 | 723.0 | 361.5 | 578.40 | 204.9 | 482.0 | 144.6 |
| 42 x 72 | 9.62 | 42.1 | 28.00 | 48.0 | 24.0 | 42.29 | 48.10 | 840.0 | 420.0 | 672.00 | 238 | 560.0 | 168.0 |
| MEDIA | BACKWASH RATE/FT2 | SERVICE FLOW RATE/FT2 | WEIGHT FT3 |
| ACTIVATED CARBON | 10 – 12 GPM | 5 GPM | 25 LBS |
| BIRM REG | 10 – 12 GPM | 3.5 – 5 GPM | 48 LBS |
| CATION RESIN | 3 – 5 GPM | 1 – 5 GPM / Cu. Ft. | 54 LBS |
| FILTER AG | 8 – 10 GPM | 5 GPM | 25 LBS |
| GREENSAND | 10 – 12 GPM | 3 – 5 GPM | 86 LBS |
| KDF | 30 GPM | 15 GPM | 171 LBS |
| MTM | 8 – 10 GPM | 2 – 5 GPM | 45 – 50 LBS |
| MULTIMEDIA | 12 -15 GPM | 5 GPM | 100 LBS |
| NEXSAND | 13 – 22 GPM | 12 – 20 GPM | 55 LBS |
| PYROLUX | 25 – 30 GPM | 5 GPM | 125 LBS |