| Set | Middle Diameter Pipe (mm) | 10 Year Saving (£) | 20 Year Saving (£) | 30 Year Saving (£) | Largest Diameter Pipe (mm) | 10 Year Saving (£) | 20 Year Saving (£) | 30 Year Saving (£) |
| 1 | 250 | 7600 | 15,200 | 22,799 | 350 | 8176 | 16,352 | 24,528 |
| 2 | 225 | 5827 | 11,653 | 17,480 | 355 | 6173 | 12,346 | 18,519 |
| 3 | 250 | 26,036 | 52,072 | 78,108 | 350 | 27,983 | 55,965 | 83,948 |
| 4 | 225 | 19,273 | 38,546 | 57,819 | 355 | 20,416 | 40,833 | 61,249 |
| 5 | 250 | 43,837 | 87,675 | 131,512 | 350 | 47,096 | 94,191 | 141,287 |
| 6 | 225 | 31,937 | 63,874 | 95,811 | 355 | 33,830 | 67,660 | 101,491 |
| 7 | 250 | 53,691 | 107,382 | 161,073 | 350 | 57,563 | 115,126 | 172,689 |
| 8 | 225 | 40,244 | 80,487 | 120,731 | 355 | 42,566 | 85,131 | 127,697 |
| 9 | 250 | 81,678 | 163,356 | 245,034 | 350 | 87,534 | 175,068 | 262,602 |
| 10 | 225 | 60,402 | 120,805 | 181,207 | 355 | 63,882 | 127,764 | 191,646 |
| 11 | 250 | 113,172 | 226,345 | 339,517 | 350 | 121,250 | 242,500 | 363,750 |
| 12 | 225 | 82,797 | 165,595 | 248,392 | 355 | 87,562 | 175,123 | 262,685 |
| 13 | 250 | 92,832 | 185,665 | 278,497 | 350 | 99,399 | 198,798 | 298,198 |
| 14 | 225 | 71,034 | 142,067 | 213,101 | 355 | 75,062 | 150,125 | 225,187 |
| 15 | 250 | 141,025 | 282,049 | 423,074 | 350 | 150,936 | 301,871 | 452,807 |
| 16 | 225 | 106,473 | 212,947 | 319,420 | 355 | 112,500 | 225,000 | 337,501 |
| 17 | 250 | 195,200 | 390,399 | 585,599 | 350 | 208,849 | 417,698 | 626,547 |
| 18 | 225 | 145,799 | 291,597 | 437,396 | 355 | 154,038 | 308,076 | 462,114 |
| 19 | 250 | 182,878 | 365,755 | 548,633 | 350 | 195,704 | 391,408 | 587,112 |
| 20 | 225 | 140,453 | 280,907 | 421,360 | 355 | 148,369 | 296,737 | 445,106 |
| 21 | 250 | 277,758 | 555,516 | 833,274 | 350 | 297,108 | 594,215 | 891,323 |
| 22 | 225 | 210,463 | 420,925 | 631,388 | 355 | 222,297 | 444,593 | 666,890 |
| 23 | 250 | 384,402 | 768,805 | 1,153,207 | 350 | 411,041 | 822,081 | 1,233,122 |
| 24 | 225 | 288,125 | 576,251 | 864,376 | 355 | 304,298 | 608,596 | 912,894 |