... PB 2. Size(mm):16mm-32mm 3. Used in Heating floor system Underfloor Heating Pipe PB Tube Specification:Polybutylene (PB) is a ... resistance to impact not craze, flexibility,can adopt flexible melt or clampon connection, system strict no leakage and convenient installation, ... 50-100 years, which belongs to non-electric active material, non-toxic, harmless and water-protection;2. Anti-freeze, good heat ...