Galvanised Metal T-piece built with fully pressed top section or a PSU saddle. Pressure drop, see graphs on pages 82-83 of technical data manual.
The product codes ;for these products ;contain two numbers, e.g. GALTCPU-80-63, which refer to the two variable dimensions in the tee piece.
These numbers transate as, firstly, ;the diameter of the straight portion of the pipe, and secondly, the diameter of the 90 degree spigot, ;simply:
GALTCPU - Diameter straight (Ød1) - Diameter 90 degree spigot (Ød3)
Note the diagram, below.