Double union ball valve type 355 PVC-U with solvent cement sockets. Used in many water transport applications, these valves have a radial fitting and removal device on both sides.
The coloured handle ensures clear visibility among pipes and helps with visual inspection of valve closure.
Sealing materials that are suitable for carrying water:  ball seals constructed of innovative lubricating PE-HD composite material, and EPDM O-rings.
Blue lever
The O-rings at the back compensate for seal wear
No later stage adjustments required
Constant torque