Valrom PPR reducers are utilized in indoor installations for hot water supply, cold water, and heating systems using PPR pipes. These reducers comply with SR EN ISO 15874-3. SDR7.4 reducers withstand: at 20°C PN20 bar with c=1.25 or PN16 with c=1.5. Class 1/PN8. Class 2/PN6 and Class 5/PN6. – Class 1 (hot water 60°C) – design temperature based on service life: 60°C/49 years + 80°C/1 year + 95°C/100 hours. – Class 2 (hot water 70°C) – design temperature based on service life: 70°C/49 years + 80°C/1 year + 95°C/100 hours. – Class 5 (radiator heating) – design temperature based on service life: 80°C/10 years + 60°C/25 years + 20°C/14 years + 90°C/1 year + 100°C/100 hours.