Drip Irrigation 1/4" Barbed Valve, Fits All Sizes of 1/4" Tubing, 2-Pack. Install this robust barbed valve to quickly adjust or shut off flow in 1/4" Drip tubing runs. Helps prevent over or under watering of plants with different moisture needs. Top cap turns to adjust or completely shut-off water flow; ideal for use when making repairs or refining flow to specific plants or watering zones. High-quality barbs grab all brands/sizes of 1/4" Drip tubing creating a fast, secure and leak-proof connection. Barbed end may also be inserted into 1/2" diameter or larger Drip tubing to extend and control water flow to individual plants or containers. Constructed of highly durable UV and chemical-resistant materials to assure long life. Designed for working pressure of 0-50 PSI. Simple to insert by hand