PPR reducers manufactured by Valrom are used for indoor hot water, cold water, and heating installations made of PPR pipes. The reducers comply with SR EN ISO 15874-3. Dimensions and applications SDR 6 (S 2.5). Pressure resistance according to the application classes defined in SR EN ISO 15874-1. SDR6 reducers withstand: at 20°C, PN25 bar with c=1.25 or PN20 with c=1.5. Class 1/PN10. Class 2/PN8 and Class 5/PN6. – Class 1 (60°C hot water) – design temperature related to service life: 60°C/49 years + 80°C/1 year + 95°C/100 hours. – Class 2 (70°C hot water) – design temperature related to service life: 70°C/49 years + 80°C/1 year + 95°C/100 hours. – Class 5 (radiator heating) – design temperature related to service life: 80°C/10 years + 60°C/25 years + 20°C/14 years + 90°C/1 year + 100°C/100 hours.