PP-R pipe fitting thread tee 1.Size(mm):20 ... .Light weight,easy to instal 4.Long service life PP-R pipe fitting thread tee Pressure: PN2.0, PN2.5Size( ... water supply,heating system including flooring heating, wall heating and radiating system,Central air conditioning system,industrial liquids transportation ... thermal conductivity which is only 1/1500 of brass pipe, and 1/250 of steel pipe3. Non-toxic: ...