This is targeted at the K Coefficient parameter for pipe fittings specifically, but I would imagine it is relevant to more of the MEP elements. The K Coefficient parameter should be an instance parameter or have the option to switch between type and instance depending on the family. I understand that there are generic lookup tables that give general K Coefficients for certain styles of fittings, but the built-in options are limited. Designers should have the freedom to build custom families that match published manufacturer data for each fitting size and not be confined to a single coefficient value for pipe loss calculations.
