M MINGLE Garden Hose Adapter, Female to Female, 3/4 Inch Heavy Duty Brass Connect Fittings with Dual Swivel, Pressure Washer to Garden Hose Connector, 2-Pack with Extra 4 Washers and 1 Filter :
MELNOR Metal Adapter pipe water hose Water Pump Threaded Double Female Conector | eBay
ZKZX Brass Garden Hose Double Female End Connect Adapter Double Female Quick Connector Thread Size 3/4" x 3/4" Pipe,Connect Male to Male End,3 Pieces with Extra 6 Washers (3Female) : Amazon.co.uk: Garden