Rubber antifreeze expansion plug Key benefits - Prevent water ingress and corrosion in winter by sealing and draining pipes - Protect against frost damage in swimming pool lines and underground piping - Durable and reliable: stainless steel components with heavy rubber for a firm, secure fit What it is and how it works - Wide application: serves as a plug for oil plugs, oil return pipes and cleaning pipes to keep water out during cold weather - Robust construction: metal parts are stainless steel; heavy rubber provides a strong seal - Material composition: built from high quality PP, plastic, stainless steel, PET and related materials for durability and long service life - Size and compatibility: designed to fit standard piping and components; available in multiple sizes to suit different systems Typical uses - Winterizing swimming pool piping: empty and seal pool lines to prevent water ingress and frost damage - Oil system maintenance: seal oil plugs and oil return pipes during off-season or winter shutdowns - Underground piping protection: safely seal buried pipes to keep moisture out and reduce freezing risk Performance and reliability - Provides a secure, long-lasting seal in cold conditions - Resists rust and wear thanks to stainless steel and heavy rubber construction - Suitable for use in oil, cleaning and general piping applications to prevent winter-related damage