TFU 3/4 is listed in DICSA's technical catalogue under Plastic plugs / Female plugs for male thread / Plastic female cap - UNF (JIC) thread.
Check the exact accessory reference, dimensions and installation arrangement for the intended assembly.
Source specifications: Port 1 thread: 3/4" UNF.
Use the catalogue drawing and exact part reference to check connection geometry, hose or tube compatibility, and installation requirements.
