For component dimensions not to include gaskets.

Gasket thicknesses are not included. The component dimension is indicated by the presence of two leader lines.

For component dimensions to include Gaskets.

Gasket thicknesses are included. The component dimension is indicated by the presence of only single leader lines.

Note. The length of the Valve has now increased by the thickness of the Gaskets (2mm in this case) either side.

For separate dimensioning of Gaskets.