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U.PVC pipes and fittings are manufactured on technological lines of Krauss Maffei and Battenfeld-Cincinnati - Federal Republic of Germany.
| DN | Dmin | Zmin | Hmin | Bmin | D₁min | Z₁min | H₁min | |
| mm x mm | inch x inch | mm | mm | mm | mm | mm | mm | mm |
| 21 x 21 | 21 x 1/2 | 27 | 11 | 43 | 32 | 29 | 13 | 29 |
| 21 x 27 | 21 x 3/4 | 27 | 12 | 43 | 40 | 37 | 14 | 34 |
| 27 x 27 | 27 x 3/4 | 33 | 14 | 50 | 40 | 37 | 15 | 34 |
| 27 x 21 | 27 x 1/2 | 33 | 15 | 51 | 32 | 29 | 16 | 33 |
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