This Hack For Hanging Outdoor String Lights Will Make Your Summer

Attach the caps. We bought 1/2-inch "Knock Out Seals" for this. They are essentially flat caps with metal ribbing on the inside that securely seals it at the end of the pipe. I'm sure they have a precise and specific purpose that probably has nothing to do with what we used it for, but it worked perfectly! We just needed to use pliers to adjust the angle of the metal ribbing inside so it fit well.