How to connect the plastic pipe and the steel pipe joint?
Because the thermal expansion coefficient of plastic is larger than steel, if the plastic pipe is in it, the steel pipe is outside, and when the temperature is lower, the plastic joint will crack automatically because the plastic pipe is shrinking badly. In turn, it won't crack easily
The plastic pipe is outside and the steel pipe is inside
PPR pipe and steel pipe have special pipe fittings, such as internal thread direct, external thread direct, internal thread elbow, outer thread elbow, inner thread three links, and so on.
