Durable replacement seal for Speedfit fittings. JG Speedfit EPDM O-Ring (also known as a toric joint) is used to create a permanent leak-proof connection. Designed, manufactured, and assembled in the UK. Features and benefits: Replaces damaged or worn O-Rings in Speedfit Twist & Lock fittings. Suitable for hot and cold water and central heating systems. Compatible with plastic or copper pipe.