How to Replace a Tap Washer in 5 Easy Steps
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A dripping tap is one of the most common plumbing annoyances, and in most cases, it comes down to one small, inexpensive part: the washer. Here’s how to replace a tap washer yourself in five easy steps.
Tools You'll Need
An adjustable spanner, a flathead or Phillips head screwdriver (depending on your tap), a replacement washer sized to match your tap, and plumber’s grease (optional, but helps the tap turn smoothly afterwards).
Step 1: Turn Off the Water Supply
Find the isolation valve under the sink or basin and turn it off, or shut off your home’s main water supply if there’s no individual valve. Turn the tap on briefly afterwards to release any remaining pressure in the line.
Step 2: Remove the Tap Handle
Most tap handles are held on by a single screw, sometimes hidden under a decorative cap on top. Pop the cap off with a flathead screwdriver, remove the screw, and lift the handle away.
Step 3: Take Out the Old Washer
Underneath the handle, you’ll find a nut holding the tap’s spindle in place – loosen this with your spanner and lift the spindle out. The washer sits at the base of the spindle, usually held on by a small screw or simply seated in place.
Step 4: Fit the New Washer
Take your old washer to the hardware store if you’re not sure of the size, since tap washers come in several sizes and shapes. Fit the new washer the same way the old one came off, and apply a light smear of plumber’s grease to the spindle threads if you have it.
Step 5: Reassemble and Test the Tap
Put the spindle back in, tighten the retaining nut, reattach the handle and screw, then turn the water supply back on. Run the tap and check that it turns smoothly, closes fully, and doesn’t drip.
Still Dripping After Changing the Washer?
If your tap is still dripping after a fresh washer, the washer usually isn’t the problem anymore it’s more likely the valve seat inside the tap body, which isn’t a DIY fix. A plumber near me search will turn up plenty of options for general tap and pipe repairs, but if the tap’s dripping constantly and running up your water bill, it’s worth asking whether they can attend the same day rather than booking in for next week.
Plumb Construct’s licensed Melbourne plumbers repair leaking taps and pipes for homes and businesses, and we’ll always diagnose the real cause rather than just replacing parts one at a time.
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Frequently Asked Questions
Why is my tap still dripping after I replaced the washer?
This usually means the valve seat, cartridge, or spindle is worn rather than just the washer. A plumber can identify the actual cause and fix it properly.
How do I know what size washer my tap needs?
The easiest way is to take the old washer with you to the hardware store, or note down your tap’s brand and model if you know it. Washers vary in size and material depending on the tap type.
Can I replace a tap washer without turning off the water?
No, you need to turn off the water supply first, either at the isolation valve or the main supply, otherwise you’ll get a strong spray of water when you remove the spindle.
Are all tap washers the same?
No. Washers vary by size, shape, and material depending on whether you have a compression tap, a mixer tap, or a modern ceramic disc tap – some newer taps use cartridges instead of traditional washers.
How much does it cost to get a plumber to fix a dripping tap?
A simple washer replacement is one of the least expensive plumbing call-outs, though cost still depends on the tap type and any additional wear found during the repair. Get an upfront quote before work begins.
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