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If you are weighing up a DIY swap, how to change a kitchen tap is simpler than you might think when you plan properly and follow a safe sequence. After 20 years fitting taps and sinks across the UK, here is our clear, no-nonsense approach.
How to change a kitchen tap safely at home?
A how to change a kitchen tap project comes down to three things: isolating the water, removing the old tap without damaging the sink, and reconnecting the new tap so it is watertight. Use the checklist below and always follow the manufacturer’s instructions.
Tools and parts you will need
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Adjustable spanner and basin wrench
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PTFE tape and a couple of spare fibre or rubber washers
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Bucket, towels and a torch
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Cleaning pads for the tap base area
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New tap with fixing kit and flexible tails
Before you begin, sense-check the basics with Are Kitchen Taps Easy to Install? and choose a suitable model from Kitchen Taps or Monobloc Taps.
Step 1. Isolate and depressurise
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Turn the hot and cold isolation valves beneath the sink to the off position. If there are no valves, turn off the main stopcock.
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Open the old tap to relieve pressure and drain any remaining water.
Step 2. Photograph the existing set-up
Take a quick picture of the pipework, washers and order of parts. It makes reassembly faster and avoids guesswork.
Step 3. Disconnect the supply tails
Place a bucket underneath. Use the basin wrench to loosen the nuts that connect the flexible tails to the isolation valves. Keep the washers safe.
Step 4. Remove the old tap
Undo the tap’s underside fixing nuts and any horseshoe brackets. Lift the tap out from above. Clean away old sealant so the new base sits perfectly flat.
Step 5. Seat the new tap
Fit the gasket or apply a thin bead of sealant if the instructions call for it. Feed the tails through the hole, align the tap, then tighten the fixing kit from below. Hand tight plus a small tweak is usually enough.
Step 6. Reconnect and seal
Wrap PTFE tape on any male threads that require it. Reconnect the tails to the isolation valves, ensuring hot to the left and cold to the right.
Step 7. Turn on and test for leaks
Open the isolation valves slowly while watching every joint. Use dry kitchen roll around connections to spot drips. Flush the tap for a minute and clear the aerator of any debris.
Choosing the right tap for your pressure and sink
Low water pressure or a deep double bowl can affect flow. Our overview Nesstar’s Kitchen Tap Buying Guide explains spout heights, cartridge types and pressure requirements. If you want extra reach, look at Pull Out Taps. Thinking about instant hot drinks and pans, compare Boiling Water Taps and read Nesstar’s Boiling Water Tap Buying Guide.
Troubleshooting after installation
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Drip from the spout: debris may be trapped in the cartridge. Flush the system and check the aerator.
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Drip at a compression joint: remake the joint with a fresh washer and gentle, even tightening.
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Poor flow: confirm isolation valves are fully open and that the tap matches your water pressure.
If the drip persists, see Can Mixer Taps Be Repaired? or Why is my mixer tap constantly dripping?.
When to call a professional
If you cannot isolate the supply, if pipework is corroded, or if you are unsure about UK water regulations, hire an approved installer. You can check parts and practice through the Water Regulations Advisory Scheme (WRAS) and find qualified fitters via WaterSafe.
Final checks and confidence: how to change a kitchen tap
Confirm every joint is dry after 10 minutes, wipe down, and keep your instruction booklet and spare washers in a labelled bag under the sink. If you decide a DIY swap is not for you, our guide Do you need a plumber to change taps? helps you weigh the pros and cons. Ready to upgrade now you know how to change a kitchen tap? Explore finishes and styles in Modern Kitchen Taps or Traditional Kitchen Taps.
