GRP one-piece tanks are manufactured to BS13280:2001 standard using high quality glass reinforced polyester (GRP) resins. The tanks comply with UK water supply regulations 1999 and have been tested and approved by WRAS.
| One-piece tank | Internal length | Internal width | Internal height | External length | External width | External height | Capacity litres | Capacity gallons |
|---|---|---|---|---|---|---|---|---|
| BOP40-I | 680 | 510 | 510 | 790 | 600 | 540 | 180 | 40 |
| BOP50-I | 737 | 559 | 559 | 812 | 634 | 580 | 230 | 50 |
| BOP70-I | 910 | 610 | 585 | 985 | 685 | 606 | 320 | 70 |
| BOP70LP-I | 1524 | 457 | 457 | 1599 | 532 | 503 | 320 | 70 |
| BOP100-I | 965 | 686 | 686 | 1040 | 761 | 732 | 454 | 100 |
| BOP110-I | 1300 | 750 | 510 | 1450 | 900 | 556 | 500 | 110 |
| BOP110LP-I | 1000 | 1000 | 500 | 1150 | 1150 | 546 | 500 | 110 |
| BOP125-I | 965 | 762 | 787 | 1065 | 862 | 833 | 570 | 125 |
| BOP150-I | 1092 | 864 | 737 | 1192 | 964 | 783 | 681 | 150 |
| BOP200-I | 1168 | 889 | 889 | 1268 | 989 | 935 | 910 | 200 |
| BOP220-I | 1000 | 1000 | 1000 | 1150 | 1150 | 1046 | 1000 | 220 |
| BOP250-I | 1524 | 914 | 813 | 1674 | 1064 | 859 | 1140 | 250 |
| BOP300-I | 1829 | 914 | 813 | 1979 | 1064 | 859 | 1370 | 300 |
| BOP350-I | 1524 | 1143 | 914 | 1674 | 1293 | 960 | 1590 | 350 |
| BOP440-I | 2000 | 1000 | 1000 | 2180 | 1180 | 1030 | 2000 | 440 |
| BOP500-I | 1524 | 1219 | 1219 | 1674 | 1369 | 1265 | 2280 | 500 |
| BOP500LP-I | 1829 | 1219 | 1022 | 1979 | 1369 | 1068 | 2280 | 500 |
| BOP600-I | 1829 | 1219 | 1219 | 1979 | 1369 | 1265 | 2730 | 600 |
| BOP800-I | 2438 | 1219 | 1219 | 2588 | 1369 | 1265 | 3640 | 800 |
| BOP1000-I | 2438 | 1524 | 1219 | 2588 | 1674 | 1265 | 4550 | 1000 |
All dimensions in mm
