Question:
I have a reducing valve that’s leaking at the threaded connection. Is it as simple as loosening the connection and rethreading with Teflon tape or dope, or should I replace the valve and male fitting?
Answer:
Fixing a leaking reducing valve can be straightforward, but it depends on the condition of the valve and fitting. Here’s how you can proceed:
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Turn off the water supply: Always start by shutting off the water supply to avoid any mess or accidents.
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Inspect the leak: If the leak is only happening at the threaded connection, you may be able to fix it by rethreading the connection. However, you need to check if the threads are damaged or corroded.
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Clean the connection: Remove any old Teflon tape, pipe dope, or debris from the threads. Use a wire brush or rag to clean both the male fitting and the female connection.
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Apply new Teflon tape: Wrap new Teflon tape around the threads of the male fitting in a clockwise direction. Make sure the tape is snug but not too thick, as too much tape can cause problems when tightening the connection.
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Reassemble and tighten: Reattach the valve and tighten the connection. Avoid over-tightening, as this can damage the threads. Ensure the connection is secure but not overly tight.
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Check for leaks: Once everything is reassembled, turn the water supply back on and check for any leaks. If the leak is gone, the problem was likely a loose connection or worn Teflon tape.
If the leak persists or the threads are damaged or corroded, you may need to replace the valve and male fitting. A worn-out fitting or valve may no longer form a proper seal, making a replacement necessary to avoid future leaks.
For more tips on plumbing repairs, visit Plumbing 101.
I’m Chris Mayer, writing for Plumbing 101.
