Changing A Washer In A Mixer Tap

Hey there, DIY warrior! So, your trusty kitchen tap has started doing that annoying little drip, drip, drip? Or maybe your bathroom one is looking a bit… leaky? Don't you fret! That little nuisance is probably just a sad, worn-out washer begging for a replacement. And guess what? You can totally fix this yourself! No need to call in the cavalry (or pay a plumber a small fortune for what amounts to a tiny rubber ring). We’re about to embark on a mini-adventure into the wonderful world of tap repair, and I promise, it’s way less intimidating than it sounds. Think of it as a little spa day for your tap!
Before we dive headfirst into tap surgery, let’s have a quick chat about what’s going on. Most mixer taps (you know, the ones with a single lever to control both hot and cold water – a true marvel of modern plumbing!) have a few key components that make them work. Inside that shiny exterior, there’s usually a little cartridge or, in older models, a couple of ceramic discs. And nestled within those are the unsung heroes of leak prevention: the humble washer. These little rubber or silicone rings are the gatekeepers, the bouncers of your tap. They create a seal, stopping water in its tracks when you’ve turned the handle off. When they get old, brittle, or just plain tired, they lose their sealing superpowers, and voilà – the dreaded drip.
Now, the good news is, replacing a washer is usually a pretty straightforward job. It’s like changing a lightbulb, but with a bit more potential for getting your hands wet. So, grab your courage, a few basic tools, and let’s get this done. We’ll be tap-tastic in no time!
Must Read
First Things First: Prep Your Battlefield!
Alright, soldier, before we start disassembling anything, we need to be prepared. This is crucial. Think of it like packing for a camping trip – you don't want to be miles from civilization wishing you'd brought that can opener, right? Same goes for tap repair.
Step 1: Turn Off the Water! This is non-negotiable. Seriously, don't skip this. You don't want a surprise geyser in your kitchen, do you? Look under your sink. You should see two little knobs or levers attached to the pipes that lead up to your tap. These are your isolation valves. Turn them clockwise until they stop. If you can’t find these, or if they look like they’re about to crumble into dust, don't panic. You can always turn off the main water supply to your house. This is usually located in your basement, garage, or sometimes outside near your water meter. Just remember to turn it back on when you're finished!
Step 2: Drain the Residual Water. Even after you’ve turned off the valves, there’ll be a bit of water still hanging out in the pipes. So, with the tap in the ‘on’ position, let that last bit of water trickle out. This will prevent any embarrassing drips when you start taking things apart. It’s like giving your tap a little sigh of relief before its makeover.
Step 3: Gather Your Tools. You won’t need a whole toolbox for this, thankfully. Here’s your essential kit:

- Adjustable Wrench (or a couple of spanners): For loosening and tightening nuts.
- Phillips Head Screwdriver: You might need this for removing decorative caps.
- Flathead Screwdriver: Sometimes useful for gently prying things open.
- Pliers: Good for gripping and pulling stubborn parts.
- Penetrating Oil (like WD-40): If things are a bit stuck, this is your best friend. Apply sparingly!
- Rag or Towel: To catch drips and keep things clean. You'll be a pro at this in no time.
- New Washers: The star of the show! We’ll talk about getting the right ones in a minute.
- A Small Bowl or Container: To keep all those tiny screws and bits safe. We don't want them making a break for it!
The Hunt for the Perfect Washer
Okay, before you go digging into your tap, it’s a good idea to know what you’re looking for. Not all washers are created equal, and the wrong size or type can make your problem worse (or just not fix it at all). The best way to get the right washer is to take the old one to the shop. Once you've successfully removed it, of course!
However, if you’re feeling brave and want to get the parts beforehand, you’ll need to identify the type of tap you have. Most modern mixer taps use a cartridge, and it’s often easier to replace the whole cartridge than just the individual washers within it. But, if your tap is older, or if you’ve specifically identified it as having replaceable washers, then you’ll want to note the size and thickness. You can usually buy them in assorted packs at your local hardware store or online. It’s worth buying a small assortment pack if you’re unsure, as they’re not expensive and you’ll have spares for future tap emergencies. Think of it as building your plumbing emergency preparedness kit!
Let the Tap Disassembly Begin!
Alright, deep breaths. We’re going in. Remember that rag? Have it handy. And that little bowl? Keep it close. We’re about to become tap whisperers.
Step 1: Locate the Decorative Cap. Most tap handles have a small decorative cap that hides the screw holding the handle in place. It might have a little red or blue dot on it, or it could just be a metal cap. Gently pry this off with your flathead screwdriver or even your fingernail. Be gentle! We don’t want to scratch your lovely tap.

Step 2: Remove the Handle. Once the cap is off, you’ll see a screw. Unscrew it completely. Now, carefully wiggle the tap handle off. It might be a bit stiff, so a gentle pull and twist should do the trick. If it’s really stuck, a tiny squirt of penetrating oil might help. Let it sit for a minute or two, then try again. Sometimes, a bit of gentle persuasion is all it needs.
Step 3: Uncover the Cartridge or Valve Stem. With the handle off, you’ll see the inner workings. If you have a modern cartridge tap, you’ll see a cylindrical unit. If it’s an older tap with separate washers, you’ll see a valve stem. There might be a decorative shroud or cover that you’ll need to unscrew or lift off. Again, use your adjustable wrench or spanners here. Take your time and avoid forcing anything.
Step 4: Remove the Cartridge or Valve Stem. This is the moment of truth! If it's a cartridge, it's usually held in place by a retaining nut or clip. You’ll need to unscrew this nut with your wrench. Once the nut is off, you should be able to pull the cartridge straight out. Sometimes, they can be a bit stubborn. You might need to wiggle it gently or use your pliers to grip it. If it’s a valve stem, you’ll unscrew the entire stem assembly.
The Washer Extraction: A Delicate Operation
Okay, you’ve got the cartridge or valve stem out. Hooray! Now, let’s find that elusive washer. If you removed a valve stem assembly, you’ll usually see the washer at the bottom, often held in place by a screw. Unscrew this carefully. The old washer might be a bit distorted or stuck on. Use your screwdriver or pliers to gently pry it off. Be careful not to damage the seat where the washer sits – that’s the metal part that the washer seals against.

If you’ve pulled out a cartridge, it’s a bit different. Modern cartridges usually don't have individual washers you can easily replace; instead, the sealing is done by internal ceramic discs or O-rings. In this case, you’ll likely need to replace the entire cartridge. Pop the old cartridge out, and take it with you to the hardware store to find an exact match. They’re usually pretty easy to find.
Installing the New Washer (or Cartridge)
The moment you've been waiting for! It's time to give your tap a new lease on life.
Step 1: Clean Up. Before you put anything new in, give the area a good wipe down. Get rid of any old gunk or debris. A clean surface is a happy surface!
Step 2: Fit the New Washer (or Cartridge).

- For Washer Replacement: If you replaced an old washer, take your new, shiny washer and pop it onto the valve stem. Make sure it’s seated correctly. Then, screw it back into place. Don’t overtighten it; just make sure it’s snug.
- For Cartridge Replacement: Line up your new cartridge with the opening in the tap body. It should slide in smoothly. Make sure it’s oriented correctly – there’s usually a specific way it needs to go in. Then, screw the retaining nut or clip back on to secure it. Again, snug is good; no need for super-strength tightening.
Step 3: Reassemble the Tap. Now, we just reverse the disassembly process. Put the shroud or cover back on, screw the valve stem or cartridge assembly back into the tap body, and then put the handle back on. Don’t forget to screw that handle back on securely. Finally, pop the decorative cap back into place.
The Grand Finale: Turning the Water Back On!
This is the part where you stand back and admire your handiwork. With the tap handle still in the ‘off’ position, it’s time to turn the water back on. Slowly open those isolation valves (or the main supply valve). Watch and listen. Do you hear any gurgling? Any immediate leaks? Hopefully, it’s just a gentle flow of water returning to your pipes.
Once the water is back on, slowly turn the tap on and off a few times. Test both hot and cold. Is the drip gone? Is the handle moving smoothly? Give it a little bit of a wiggle. You’ve done it! You’ve conquered the leaky tap!
If, by some small chance, there’s still a drip, don’t despair. It’s possible the valve seat itself is damaged (a bit more advanced, but still fixable) or you might have the wrong size washer. But for most of you, this simple replacement should have done the trick.
So there you have it! You’ve just performed a bit of plumbing magic. You’ve saved yourself some money, learned a new skill, and silenced that annoying drip. You’re basically a superhero in disguise, a domestic goddess or god, a true champion of the home! Go on, give yourself a pat on the back (you’ve earned it!). Now, go make yourself a cuppa and enjoy the sweet, sweet silence of a non-dripping tap. You magnificent DIYer, you!
