How to Change a Kitchen Tap Safely and Securely

Changing a kitchen tap (also called a faucet) replaces a worn, leaking, or outdated fixture and can improve how your sink works. Before buying a replacement, check the number and spacing of the sink’s mounting holes, the tap’s connection type, and whether the new model fits beneath the sink. This guide assumes a standard sink-mounted tap with accessible shutoff valves. If you cannot isolate the water or find damaged plumbing, stop and contact a licensed plumber.

What You’ll Need

Replacement kitchen tap, compatible with the sink’s mounting holes and supply connections
Adjustable wrench and basin wrench or tap-installation tool
Bucket or shallow pan, towels, and a sponge
Flashlight and protective gloves; eye protection is useful when working overhead
Screwdriver, if needed for the tap’s mounting hardware
New flexible supply lines if the tap does not include them or the existing lines are worn, damaged, or the wrong length
Plumber’s tape only if the fitting manufacturer specifies it for a threaded connection; do not use it on compression fittings or rubber-sealed connectors

Step-by-Step

Check compatibility. Look underneath the sink to identify how the old tap is secured and where its hot and cold lines connect. Measure the mounting-hole spacing and check how many holes are in use. Compare these details with the replacement’s instructions, including spout reach, clearance, hose length, and connection sizes. A deck plate can cover extra holes only if the new tap is designed to use one.
Clear and protect the area. Remove stored items from the cabinet so you can reach the valves and connections. Put a bucket beneath them and lay towels around it. Take a photo of the existing pipework and connections to help you identify what goes where during reassembly.
Shut off both supplies. Turn the hot and cold shutoff valves beneath the sink clockwise until closed; do not force a stuck valve. If there are no working local valves, shut off the home’s main water supply. Open the old tap, including both temperature directions, to release pressure and drain remaining water. Confirm the flow stops before loosening anything.
Disconnect the supply lines. With the bucket in place, use a wrench to loosen the connectors joining the supply lines to the shutoff valves. Hold the valve steady with a second wrench where possible so you do not twist the pipe. A little trapped water is normal. If a valve or pipe begins to turn, stop rather than risk breaking it.
Remove the old tap. Disconnect any pull-down spray hose or counterweight, noting how it is routed. From beneath the sink, loosen the mounting nut or bracket with a basin wrench or the tool supplied with the tap. Support the tap from above as the last fastener comes free, then lift it out. Scrape away old sealant or grime without scratching the sink.
Prepare the new tap. Read its instructions before assembly; mounting methods and seals differ. Fit the gasket or sealing plate in the specified position. Feed the tap’s hoses through the correct hole without kinking them, and keep hot and cold lines on their intended sides. If the manufacturer calls for sealant, use only the specified type and amount.
Secure the tap. Center it on the sink and check that the handle and spout face the right way. From below, install the washer, bracket, and mounting nut in the order shown in the instructions. Tighten evenly until the tap is stable, but do not overtighten: excessive force can damage the sink, gasket, or tap body.
Connect the water lines. Attach the hot and cold hoses to their matching shutoff valves, following the tap’s labels and instructions. Keep hoses untwisted, unkinked, and clear of sharp edges or moving parts. Hand-start each connector to avoid cross-threading, then tighten as directed by its manufacturer. Do not add plumber’s tape to a connector that seals with a washer or compression ring.
Reconnect the sprayer. If the tap has a pull-down hose, attach it as instructed and check that any weight is in the correct position. Pull the hose out and let it retract before turning the water on. Make sure it does not catch on stored items, drain pipes, or the shutoff valves.
Restore water and test. Close the tap, then slowly open both shutoff valves counterclockwise. Watch the connections as pressure returns. Turn on cold and hot water separately, then together, and run it long enough to flush air and debris. Check the tap base, hose connections, valves, and sprayer for drips. Dry the area and check again after several minutes.

Common Mistakes

Skipping the compatibility check: A tap can have the wrong hole pattern, reach, or hose connections even if it looks suitable. Verify measurements and specifications before removing the old fixture.
Forgetting to shut off water: Opening a pressurized line can cause flooding. Test that the tap no longer flows before disconnecting a hose.
Using the wrong sealant: Tape or sealant cannot fix every leak and may prevent a compression or washer-sealed joint from seating properly. Follow the fitting instructions.
Overtightening connections: This can crush washers, strip threads, or damage valves. Start threads by hand and tighten only as specified.
Crossing or twisting hoses: This can restrict flow and strain fittings. Keep hot and cold connections matched and route hoses without sharp bends.

Tips

Take the old tap or clear photos of its connections when choosing a replacement; shut the water off before removing any part.
Use a basin wrench for cramped mounting nuts, and position a flashlight so both hands remain free.
Keep the manufacturer’s instructions nearby. Tap designs vary, so their specified gasket placement, tightening method, and connector requirements take priority over general guidance.
After the first test, check beneath the sink again later. A slow seep can be easier to spot once the area has been dried.

Troubleshooting

A shutoff valve will not close: Do not force it or loosen a pressurized connection. If the tap still runs, close the home’s main shutoff if safe and accessible, then arrange valve repair or call a plumber.
The mounting nut will not move: Make sure you are using the right tool and have room to turn it. Avoid levering against the sink or pipes. If corrosion has seized the fitting, a plumber can remove it without damaging the sink.
A connection leaks: Turn off the relevant supply, dry the joint, and check that the connector is straight, correctly matched, and has its washer or seal in place. Retighten only as directed. Replace a damaged seal or hose; do not keep tightening a leaking fitting.
Water flow is weak or uneven: Check that both valves are fully open and that hoses are not kinked. Flush the tap as its instructions direct, and check the aerator or spray head for debris if the flow remains poor.
Hot and cold are reversed: Turn off the supplies and verify that the hoses match the tap’s hot and cold markings. Swap connections only if the tap and hose layout permit it.
The tap moves or the spray hose catches: Shut off water before adjusting anything underneath. Reposition the mounting bracket or hose weight according to the instructions. If the sink is cracked or the tap cannot be secured firmly, stop and seek professional help.

Frequently Asked Questions

Can I change a kitchen tap without turning off the main water?

Usually, yes, if the hot and cold shutoff valves beneath the sink both work. If they are missing, stuck, or leaking, shut off the home’s main supply before opening a connection.

How long does it take to change a kitchen tap?

The time depends on access, the tap design, and whether old fittings are corroded. A straightforward replacement can take a few hours; seized hardware or altered pipework can make it a job for a plumber.

Do I need plumber’s tape on the tap connections?

Not usually on supply connectors that seal with a washer or compression fitting. Use tape only when the fitting manufacturer calls for it; tape does not repair a damaged seal.

Can I reuse the old supply hoses?

Only if they are compatible with the new tap and in good condition, with no corrosion, cracks, bulges, or damaged ends. Follow the tap instructions and replace unsuitable lines rather than forcing a mismatch.

When should I call a plumber?

Call a plumber if you cannot shut off the water, a valve or pipe is damaged, the mounting hardware is seized, connections keep leaking, or the installation requires changing fixed plumbing.

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