For internal systems of distribution of hot and cold water in buildings, for systems of floor and central heating, ventilation. A polypropylene pipe reinforced with an aluminum sheet between two layers of polymer gives minimal thermal expansion and, therefore, has increased strength, which are the main advantages of this type of pipe compared to single-layer counterparts.
| Size, mm | Article | Nominal pressure | Ø ext. mm | Ø int., mm | Thicknesses walls, mm | Number |
| 20 × 3.4 | KR.PPA20 | 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.PPA25 | 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.PPA32 | 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.PPA40 | 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.PPA50 | 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.PPA63 | PN-20 (1 pcs = 4 m) | 63.0 +0.6 | 42.0 +0.6 | 10.5 +1.3 | 12 r.m. / 3 pcs |