Tea Concentrate Dispensers Venturi valve creates siphon pulling product through to mixing valve. Rear shut-off valve for cleaning dispenser. Accepts 2 .5 gallon (1.9 litre) jugs in top of container or bag-in-box. Side off-set handles for side-by-side placement. Built-in pressure regulator provides consistent product to water ratio. Mixes a range of 5:1 to 15:1 concentrate to water ratio. Solid plastic lid.