The JG Speedfit Superseal Pipe Insert 15 mm is a small internal push-fit insert used when connecting 15 mm Speedfit pipe to a Speedfit fitting. It goes inside the end of the pipe before you push it into a fitting, and features two O-rings (dual-action seal) to give an enhanced, very secure watertight seal and extra rigidity compared with a standard insert. It helps the pipe stay round and improves the strength and reliability of the joint in hot/cold water and central-heating systems.
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