Xavax Double Connection Drain Hose for Washing Machine and Dishwasher, Hoses with Internal Dimensions 19-23 mm, 2-way Distributor with Seal/Y-distributor 1 inch) white : Amazon.co.uk: DIY & Tools
Dual Device Connection Y Adapter with 1" Seal for Washing Machine / Dishwasher / Condensation Dryer Drain Hose | DIY at B&Q