🚰 How to Replace a Kitchen Tap – DIY Plumbing Tips from GladPro

GladPro Plumbing Services
Aug 26
5 min read

If you're tired of your old, leaking, or outdated kitchen tap, now is the perfect time for a fresh upgrade. A new tap can dramatically improve both the look and functionality of your kitchen—without the need for a full renovation.

At GladPro Plumbing Services, we know how much of a difference small changes can make. That’s why we’ve created this simple step-by-step guide to help you replace your kitchen tap safely and confidently—whether you're in Gravesend, Kent, Essex, or South East London.

Plumber in blue uniform fixing a stainless steel kitchen sink from below. Tools and pipes scattered on a gray counter. White cabinets. — Installing New Kitchen Taps

🧰 Tools You’ll Need for Replacing a Kitchen Tap

Before you get started, make sure you have the right tools to hand:

Adjustable spanner or basin wrench 🔧
Screwdriver (flathead or Phillips depending on fittings)
Bucket or bowl (for catching any water)
Towels or cloths
Cleaning sponge or cloth
Rubber gloves (optional)
Flashlight or headlamp (if working in dark spaces under the sink)

🔧 Step-by-Step Guide to Replacing a Kitchen Tap

Step 1: Clear the Area Under the Sink

🧽 Start by emptying the cupboard space beneath your kitchen sink. This will give you the room you need to work safely and comfortably. It’s also a good opportunity to get rid of expired cleaning products or tidy up the space.

Tip: Lay a towel on the base of the cupboard to soak up any water spills.

Step 2: Turn Off the Water Supply

🚱 Locate your isolation valves, usually found under the sink. Turn them clockwise to shut off the hot and cold water supplies. If your kitchen doesn’t have isolation valves, you may need to shut off the water at the main stopcock, typically located under the stairs, near the front door or out on the path outside your house.

Now, open the tap to confirm that water has stopped running.

Step 3: Disconnect the Old Tap

This step can vary depending on your current tap setup:

Place a bucket under the pipes to catch any excess water.
Use an adjustable spanner or basin wrench to unscrew the water supply pipes from the base of the tap.
Undo the securing nuts or bolts that hold the tap to the sink from underneath.
Carefully lift out the old tap.

⚠️ Note: If the connections are in a tight space or badly corroded (common in older homes, don’t force it—you risk damaging the pipes. In that case, it’s best to call GladPro Plumbing Services for expert help.

Step 4: Clean the Tap Hole Area

🧼 Before installing your new tap, clean around the tap hole thoroughly. Years of water, grime, and limescale can build up and prevent a good seal with your new tap.

Use a sponge, limescale remover, or vinegar solution to scrub the area clean.

Step 5: Install the New Tap

Slot the tap into position:Insert the tails (the metal pipes beneath the tap) into the tap hole. Make sure the tap is sitting straight and flush on the sink surface.
Secure the tap from underneath:Use the provided rubber washer and fixing nut to hold the tap in place. Hand-tighten first, then use your spanner to fully secure.
Check alignment:Stand back up and check the tap is perfectly straight. If not, loosen slightly and adjust before tightening fully again.

💧 Why Your Kitchen Tap Needs an Air Gap – Staying Compliant with UK Water Regulations

When installing or replacing a kitchen tap in the UK, it’s essential to consider more than just how it looks or functions — your installation must comply with UK Water Supply (Water Fittings) Regulations 1999. One key requirement is the inclusion of an appropriate air gap between the water outlet and the maximum water level in sinks or appliances.

🔍 What is an Air Gap?

An air gap is a physical space between the tap’s spout and the highest potential water level in the sink or basin. Its purpose is to prevent contaminated water from backflowing into the clean mains water supply — a risk known as back siphonage.

Without this gap, there’s a possibility that dirty water could be drawn back into the tap and into your home’s water system, especially in cases of sudden drops in water pressure.

🚱 UK Water Regulations and Risk Categories

According to UK regulations:

Most domestic kitchen taps must have an air gap that meets a Type A backflow prevention requirement.
The tap outlet should be at least 20mm above the spillover level of the sink or draining board (or twice the diameter of the outlet pipe — whichever is greater).
Taps with a pull-out spray or flexible hose (common in modern kitchens) are considered higher risk (fluid category 5), and must be fitted with a double check valve or specialist backflow prevention device.

✅ What You Should Do

Make sure your tap sits high enough above the sink rim
Avoid using low-hanging or incorrectly installed pull-out hoses without backflow protection
Use check valves or vacuum breakers where required

If you’re unsure whether your tap meets UK standards, GladPro Plumbing Services can help ensure your installation is compliant and safe.

Step 6: Connect the Water Supply

Most modern taps come with flexible hoses that are easy to install:

Connect the hot and cold hoses to their corresponding water supplies. Hand-tighten, then give a final turn with your spanner.
Double-check all connections to ensure they are snug and leak-free.

🛠️ Some taps may have push-fit connections or compression fittings—always check the manufacturer’s instructions.

Step 7: Turn the Water Back On and Test

Now the exciting part!

Slowly open the isolation valves or turn the main water supply back on.
Open the tap and allow water to flow through for a few minutes.
While it runs, check underneath for leaks around the connections or washers.
Tighten any fittings if needed.

🎉 Step 8: Enjoy Your New Tap!

Congratulations—you’ve just upgraded your kitchen with a fresh, modern tap! Not only does it improve daily functionality, but it also adds a stylish touch to your kitchen space.