169 I Installation systems Installation systems / duplo systems For wall-hung WC pan. Concealed floor standing structure with compact cistern (80 mm) and dual flush (4.5 / 3 L). 90 ΓΈ elbow Duplo WC Compact Ref. A89008000D For high-lever cistern WCs. Compact concealed cistern (80 mm) with dual flush (4.5 / 3 L). Basic Tank Compact Ref. A89008020D Installation systems / operating plates Dual flush operating plate for concealed cistern. White. Chrome Matt. PL 1 Ref. A89009500D Ref. A89009502D Dual flush operating plate for concealed cistern. White. Chrome Matt. PL 2 Ref. A89009600D Ref. A89009602D