Irritrol I-PRO400-PR 4" I-PRO Pop-Up Spray Head with Pressure Regulator combines a pressure-activated wiper seal and advanced formula lubricant that virtually eliminates troublesome stick ups. Add a unique tapered lip design that prevents debris from entering the body and you have a spray head with superior performance. It’s rugged and reliable with a textured body style for a non-slip grip and even easier installation. Available in four pop-up heights with side inlet, pressure regulation and check valve options, the I-PRO Series fits most landscape application.