The 3M™ ScaleGard™ Blend Series of Heads, Model BH3-NPT custom water quality that you control. They help you save time by remembering your previous blend settings when replacement cartridges are needed. When used with 3M™ ScaleGard™ Blend Series cartridges, our heads provide hard scale and corrosion protection, maintain the taste and quality of drinking water and reduce equipment downtime. They have an easy-use adjustable dial for precision blending – simply adjust the desired level of minerals for Recipe Quality Water™. For use with 3M™ ScaleGard™ Blend Series of cartridges, the Sanitary Quick Change (SQC) encapsulated cartridge design allows for fast and easy cartridge change-outs.