when i try to export an iso, i can edit the PCF and i can insert these SKEYS:

WTBW: weldolet
SKSW: sockolet
TEBW: classic tee

if i change to sockolet or weldolet, in iso the weldolet-sockolet symbol is not shown, but i see as a pipe_to_pipe symbol intersection.

How can i make appear the weldolet/sockolet component symbol in isometric output?