For internal systems of distribution of hot and cold water in buildings, for systems of floor and central heating, ventilation. Polypropylene pipe with nominal pressure rating PN-20 – most suitable for hot water systems with temperatures up to +80℃, as well as the nominal working pressure of 20 bar (20.4 kg/cm²).
| Size, mm | Article | Nominal pressure | Ø ext. mm | Ø int., mm | Thicknesses. walls, mm | Number |
| 20 × 3.4 | KR.PPS20 | PN-20 (1 pcs = 4 m) | 20.0 +0.3 | 13.2 +0.3 | 3.4 +0.6 | 100 r.m.. / 25 pcs |
| 25 × 4.2 | KR.PPS25 | PN-20 (1 pcs = 4 m) | 25.0 +0.3 | 16.6 +0.3 | 4.2 +0.7 | 60 r.m. / 15 pcs |
| 32 × 5.4 | KR.PPS32 | PN-20 (1 pcs = 4 m) | 32.0 +0.3 | 21.2 +0.3 | 5.4 +0.8 | 40 r.m. / 10 pcs |
| 40 × 6.7 | KR.PPS40 | PN-20 (1 pcs = 4 m) | 40.0 +0.4 | 26.6 +0.4 | 6.7 +0.9 | 20 r.m. / 5 pcs |
| 50 × 8.4 | KR.PPS50 | PN-20 (1 pcs = 4 m) | 50.0 +0.5 | 33.2 +0.5 | 8.3 +1.1 | 20 r.m. / 5 pcs |
| 63 × 10.5 | KR.PPS63 | PN-20 (1 pcs = 4 m) | 63.0 +0.6 | 42.0 +0.6 | 10.5 +1.3 | 12 r.m. / 3 pcs |