Gardena Water Pumps - Pump Connection Set - Gardena 1752-20 Ref: GRD1752 For connecting 19 mm (3/4") hoses to pumps with 33,3 mm (G 1) male thread. Profi Maxi-Flow System fittings ensure increased flow rate. Contents: 1 x 2802, 1 x 2817. £9.48