PE-RT female thread coupling for heating system 1.material:PERT(LG) 2.size:s16 ... *1" 3.color:any color PE-RT female thread coupling for heating system1.material:PERT(LG)2.size:s16,s20,*1 ... Environment friendlyApplication: 1. Ground heating system, it is suitable for such heating as the living room, bedroom, public bathroom, ... milk, etc. in food industry. PE-RT female thread coupling for heating system