... ) 3/4" Rated Pressure (Bar) 200 Rated flow (GPM) 28 Garden Hose Couplings1. Brass and stainless steel construction for heavy duty ... .They are used on a wide variety of applications including garden hoses,wash down systems,and mobile water tank lines.2 ... . The unvalved design permits maximum flow with minmum pressure drop Garden Hose Couplings