Replacement 3/4" custom elbow for Miraco automatic ball waterers, part number 672. Made of high-density poly with molded hose barb end for a secure connection to your waterline. The Custom Elbow securely fits in the Outer Fill Assembly and the 521 valve (sold separately) will screw directly into the fitting for easy installation. Pipe tape can be used for added leak protection. Designed for ball waterers manufactured after May 2016