The Technical Products blowout plug is designed for compatible winterization and line-closing applications where a secure temporary seal is needed. A blowout plug is useful because it helps close off plumbing openings during maintenance or seasonal shutdown, supporting cleaner winterization work and more dependable system preparation.This replacement is especially useful when the original plug is worn, leaking, damaged, or missing. Matching the correct 1.75 inch #12BT size helps preserve intended fit and restore dependable sealing support during service procedures.The #12BT is a practical service part when a compatible pool or spa setup needs a blowout plug to restore secure line closure during winterizing or maintenance work. Technical Products blowout plug 1.75 inch #12BT size Designed for winterization and temporary line sealing Useful when the original plug is damaged or missing Supports cleaner and more dependable service preparation