Hayward PLUG 4" W/ORING F/ MDXR3

The Hayward 4‑inch Plug with O‑ring for the MDXR3 system is designed to create a secure, watertight seal when the MDXR3 drain opening needs to be temporarily closed during construction, maintenance, or system testing. Its precise sizing ensures a snug fit within the MDXR3 housing, while the integrated O‑ring provides added sealing strength to prevent water intrusion or pressure loss. Made from durable, chemical‑resistant materials, the plug maintains its integrity under long‑term exposure to treated water and varying environmental conditions, helping protect the drain assembly and maintain system reliability whenever the MDXR3 is not in active use.