
This particular issue is quite common, but fortunately, it can be easily resolved. Let's dive into the problem and discover its straightforward solutions. You won't need extensive plumbing knowledge for any of these fixes, as they are all basic and uncomplicated. The main culprits behind a stiff mixer tap are generally an:
A blocked tap shroud, Excessively tightened packing nut, or a Problem with the spindle thread O-ring.
Let's explore the remedies and conclude our discussion for today. Once fixed, you can celebrate by enjoying a refreshing glass of water from your newly restored tap! :
Fixing a Stiff Tap: A Step-by-Step Guide
To begin, it's important to turn off the water supply at the mains before attempting any repairs. This precaution will prevent any potential water damage or flooding which we doubt you would want unless an impromptu pool party is on the cards!
Now, let's dive into the three possible causes and their respective solutions.
Clear a Clogged Tap Shroud:
This fix is relatively straightforward. After turning off the water and removing the tap cover, it's time to clean everything thoroughly. The shroud, which may accumulate grime, weird sludge, corrosion, or limescale, can be easily cleaned with white vinegar. Take care not to dislodge or adjust any components while cleaning. Once done, your tap should be clean and ready to use.
Loosen the Overtightened Packing Nut:
Start by removing the top of the tap. Look for a cap or plug at the top, which is usually secured with a screw or lever. Gently unscrew or lever it up using a screwdriver. Inside, you'll find a nut called the packing nut. This nut creates a seal to prevent water from flowing back up. Sometimes, it can be overtightened, causing the tap handle to become stiff. Slowly turn the nut to loosen it, being cautious not to let water leak out. If you notice any limescale or scum on the nut, clean it off or consider replacing it.
Replace the Spindle Thread O-Ring:
This fix requires a bit more effort than the previous two but is still manageable on your own. Remove the top cap of the tap handle to reveal the valve stem, following the previous steps. Unscrew the centre screw and lift the handle straight up. Depending on your tap model, you may need to remove additional threaded caps and the spout itself. Use a wrench or pliers to rotate the base of the valve counter-clockwise and remove it.

Take out the old O-ring and replace it with a new one. Reassemble all the components as they were and test the tap. You should notice a significant improvement in its smoothness.
Remember to always exercise caution and proceed slowly when working on your tap! By following these steps, you can fix a stiff tap and restore its functionality without the need for a professional plumber.
We sell a wide range of O-rings for taps see here:
https://www.bathroomspareparts.co.uk/o-rings-2186-c.asp
Conclusion
As previously mentioned, this article provides a straightforward and effortless solution. Generally, there are three primary factors that can lead to a stiff mixer tap: the spindle O-ring, accumulation of debris inside the tap shroud, or an excessively tightened packing nut. Fortunately, all of these issues can be effectively addressed without the need for a plumber, although adjusting the O-ring may require a bit more effort. Regardless of the specific cause, by following these steps, you should have successfully resolved any stiffness in your mixer taps. Now, you can return to fully enjoying your life.