Gas pressure hose for beer or wine installations, standard 5/16" I.D. red, blue or clear vinyl hose is used in low—pressure applications under 50 PSI. There is a choice of two colors (Red or Blue) and clear. Color easily identifies the gas line from the product (beer or wine) line. Transparent hose is preferred by some as it allows for visual detection of beverage back—up or moisture from pressure flow.