PE-RT female thread coupling for heating system 1.material:PERT(LG) 2.size:s16,s20,*1/2"; ... conductivity which is only 1/1500 of brass pipe. and 1/250 of steel pipe Non-toxic, no heavy metal additives,would ... normal conditions Recycled and Environment friendlyApplication: 1. Ground heating system, it is suitable for such heating as the living room, bedroom, public bathroom ...