ALLOWABLE PIPE SIZE, CLASS AND MATERIALS FOR WATER .
DN200 250 mm OD DN250 315 mm OD DN300 400 mm OD . PE pipe is also available in 25 mm, 32 mm, 40 mm, 50 mm and 63 mm some of which are currently being used for property service connections plus 90 mm, 110 mm, and 160 mm sizes which may be considered for country supply situations where a size for size replacement option is required. (See Appendix B) ALLOWABLE PIPE MATERIALS . .