solar heater pipe 1.sizes:16*2,20*,25*2.5,32* ... 3.Certification:ISO9001 4.Supply OEM PEX-AL-PEX Pipe/solar heater pipe1.sizes:16*2,20*,25*2.5,32*3 ... high temperature and high pressureResistance to erosion and the noiseless water hammerSmooth inwall guaranteeing the least resisting force and the largest ... installed yet applicable for numerous fields PEX-AL-PEX Pipe/solar heater pipe