The V58 compression fittings can be used to connect both PEX and multilayer pipes to radiant panel stainless steel manifold outlets. V58 fittings are composed of two parts only: the clenching ring in fact, which is a separated component in traditional fittings, in V58 series is built-into the nut. Within the nut there is another metal ring with a bearing function: this device performs an anti-torsion function, avoiding the pipe from twisting when screwing the nut to the outlet.