The water softeners with 1″ and 1″¼ connections have valves made of noryl while the 1″½ and 2″ ones are made of bronze with a possible stainless steel meter.
The 1″ and 1″¼ water softeners have an integrated residual hardness mixer while the others require the installation of an external mixer. All water softeners are equipped with an automatic by-pass system during regeneration.