It sounds like you’re looking for helpful features or information related to a water softener with a model number or part number .
Based on common water softener systems (especially from brands like , EcoWater , or Kenmore ), the number 40278 most often refers to a bypass valve or a specific installation fitting kit , rather than a full water softener unit. 40278 water softener
In the meantime, if you have the and need to operate it: Turn the two knobs or levers perpendicular to the pipes for bypass , parallel for service (softened water). It sounds like you’re looking for helpful features
Here’s a breakdown of what that part is and the helpful features to look for regarding it: This is a plastic valve that connects your water softener to the main water line. It allows you to turn off water to the softener for maintenance without shutting off water to your whole house. Here’s a breakdown of what that part is