Based on the keywords provided, this guide refers to the Hizgi Plumbing Installation System, specifically focusing on a Floor Drain (GC01) and the Minimum specifications required for installation in a Private Bathroom.

While "Hizgi" is associated with these bathroom units, it is also the name of a prominent Japanese illustrator

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According to data sheets from suppliers like Sandton Tile Warehouse and Baukobox, the key technical details for the GC01 include: