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

Coupling

Coupling
Technical parameters:
An equal pass coupling is used for connecting parts of a polypropylene pipeline.
Temperature:
60⁰С working temperature
95⁰С maximum
Pressure:
PN25
Sizes
D1, mm А, mm L, mm Quantity per pack (pcs.)
16 13 31 350
20 14,5 32,5 450
25 16 36,3 300
32 18 43,2 160
40 20,5 53 75
50 23,5 51,5 55
63 27,5 59 36
75 30 65 18
90 33 75 12
110 37,1 81,9 7