Mister Landscaper 1/2-in Poly End Fitting w/Cap Use this end cap fitting to end the water supply at the end of the 1/2-in poly tubing Ergonomically designed to make installation easier and to create a secure fit based on your hand strength Typically used to close off the water supply at the end of the 1/2-in poly tubing lines and has a removable threaded cap to flush the line or to open the end to winterize To attach the 1/2-in poly first push the collar back to expose the barb with a built in o ring Next push and wiggle the 1/2-in poly onto the fitting and under the collar until snug