Use three or four times wrap of PTFE tape on radiator tails.
When installing or refitting radiator tails, correctly applying PTFE tape (also known as plumber's tape) is crucial for creating a watertight seal and preventing leaks. Using the right amount ensures a secure connection without making it difficult to tighten the nut.
Based on common practice and recommendations, the optimal amount of PTFE tape for radiator tails is quite specific.
- Recommended Wraps: When applying the tape clockwise (the direction the nut will tighten), it's recommended that you wrap it around the thread three or four times. This is thick enough to prevent leaks, but not too thick that you can't get the nut on.
Using fewer wraps might not provide an adequate seal, potentially leading to drips or leaks over time. Conversely, using too many wraps can build up excessive thickness, making it hard or even impossible to fully tighten the union nut, which can also cause leaks or damage the threads.
Practical Steps for Applying PTFE Tape
Applying the tape correctly is as important as using the right amount. Follow these steps for the best results:
- Clean the Thread: Ensure the threads on the radiator tail are clean and free from old sealant, dirt, or debris.
- Start at the End: Begin wrapping the tape at the start of the thread, nearest to the end of the tail.
- Wrap Clockwise: Wrap the tape in a clockwise direction. This is essential because when you tighten the union nut (which also turns clockwise), it helps to further secure and compress the tape into the threads rather than unwinding it.
- Overlap Slightly: Overlap each layer of tape slightly as you wrap, ensuring full coverage of the threads.
- Maintain Tension: Keep the tape taut as you wrap it. This helps it conform to the thread shape.
- Apply the Recommended Amount: Wrap the tape three or four times around the thread.
- Tear and Smooth: Once you've completed the wraps, tear the tape and smooth down the loose end onto the threads. The tape should now appear neatly wrapped around the threads, ready for the union nut.
Following these steps, combined with the recommended number of wraps, provides a reliable seal for your radiator tails.
