This compact flush union adapter connects 1.5-inch PVC plumbing into standard 1.5-inch female threaded ports on pool pumps, filters, and chlorinators. Designed specifically for tight space setups on the equipment pad, its short-profile body threads flush into the housing. The threaded union collar and inner rubber O-ring form a pressure-tight seal that unbolts quickly when servicing, cleaning, or winterizing your pool gear.