More and more water pipelines are ductile cast iron now due to their resistance to corrosion. Sewage pumping main will be a little more expensive because of the higher corrosion resistant requirement.
| Diameter of water pipes | Frost area | Non Frost area |
| mm | US$ (/m) | US$(/m) |
| 150 | 223 | 142 |
| 200 | 219 | 150 |
| 250 | 238 | 173 |
| 300 | 257 | 196 |
| 350 | 327 | 248 |
| 400 | 396 | 301 |
| 450 | 443 | 354 |
| 500 | 489 | 406 |
| 600 | 498 | 464 |
| 750 | 582 | 582 |
| 900 | 840 | 840 |
| 1050 | 1161 | 1161 |
| >1050 and <1500 | 1246 | 1246 |
| >1500 and <2100 | 1718 | 1718 |
| >2100 and <2250 | 1738 | 1738 |
| >2250 and < 2400 | 1948 | 1948 |
| >2400 and <3000 | 2066 | 2066 |
| >3000 | 2833 | 2833 |
| Note: The data are from US Environmental Protection Agency 1999 survey . | ||