Fittings in a Cleverfit system are made from PPSU, which is a plastic. The PPSU fittings are pressed with TH profile. With all fittings featuring the vision checkpoints, i.e. holes in the sleeve to assess whether a pipe has been well positioned in the fitting.
The Cleverfit system also includes compression fittings, which are used to connect elements such as radiators, manifolds and other installation equipment.