It is enough to take the RVC fitting in hand to understand that it is the standard of quality among polymer fittings

Metal-plastic pipe PERT+AL+PERT

Metal-plastic pipe PERT+AL+PERT
Technical parameters:
Intending use: for underfloor heating.
Linear expansion coefficient: 0,03 mm/m °С
GOST 53630-2009
Delivery form: bays 25m / 100m / 200m
Temperature:
80⁰С working temperature
100⁰С maximum
Pressure:
PN8
Sizes
Diameter, mm Wall thickness, mm Number in the Bay (m)
16 2,0 200 / 25
20 2,0 100 / 25