Rectangular duct GD4 Length 1m GD401.1 GD4 Length 2m GD401.2 GD8 Length 2m GD801.2 GD9 Length 2m GD901 Round duct GD4 Length 1.5m GD413 GD8 Length 1.5m GD813 GD9 Length 1.5m GD913 Rectangular connector GD4 GD402 GD8 GD802 GD9 GD902 Rectangular 90º vertical bend GD4 GD406 GD8 GD806 GD9 GD906 Rectangular to round adaptor GD4 GD407 GD8 GD807 GD9 GD907 Rectangular horizontal T-piece GD4 GD410 GD8 GD810 GD9 GD910 Rectangular mounting clip GD4 GD411 GD8 GD811 GD9 GD911 Rectangular 45º horizontal bend GD8 GD816 Rectangular flexible bend GD8 Length 1.5m GD815 Round connector GD4 GF4C GD8 GDA11 GD9 GDA13 Rectangular to round 90º bend GD4 ID 100mm GD403 GD4 OD 100mm GD404 GD8 OD 125mm GD803 GD8 OD 100mm GD804 GD9 OD 125mm GD903 GD9 OD 100mm GD904 Rectangular 90º horizontal bend GD4 GD405 GD8 GD805 GD9 GD905 Installation 1 Cut components to length as required 2 Slide together and pin through mounting straps to ceiling slab 3 Use self-seal couplings or non-hardening sealant to join components 4 Remove anti-back draught shutters from fans before connection to GD ducting GD Ducting Modular PVC ducting system Features and benefits h Non-corrosive light, rigid PVC for simple quick installation h Versatile range of components for easy design and use with domestic ventilation systems h Easy to install within the ceiling cavity or along kitchen wall cupboards (minimum void of 75mm required) Model options GD4: 110 x 54mm Ø 100mm round GD8: 204 x 60mm Ø 125mm round GD9: 220 x 90mm Ø 150mm round Material: White PVC GD4 GD8 Rigid end pieces Ancillaries