Use the Drip Tape Row Start Valve to control flow on individual drip irrigation tape lines. Works great in situations where some rows or crops may not need as much water as other rows in your drip irrigation system. It's also ideal to control fertilizer injection in your drip irrigation system. In some instances, you may not want to fertilize all crops in your garden with the same fertilizer, so the Drip Tape Row Start Valve allows you to turn off the water flow so that the fertilizer is only applied to the rows you want. This fitting has a 1/4″ barb for connecting to our Mainline Tubing. Simply punch a hole in the mainline tubing and insert the barb for a snug fit. Connect the other end to 5/8″ Drip Tape by sliding the drip tape onto the barb and tightening the nut.