Bath Tap Replacement in Harrow

Replacing bath taps is usually a one-visit job. A plumber isolates the water, disconnects the old taps, fits the new ones, reconnects the supply, and tests for leaks and flow. On a straightforward like-for-like swap with working isolation valves, expect roughly one to two hours on site. The job takes longer if the old tap connectors are seized, the new taps need different fixings, or the bath has no isolation valves and the water has to be shut off at the stopcock.

A bath tap replacement we completed in Harrow

Bath taps rarely fail overnight. The usual causes are:

If the tap is in good condition and only drips, a new washer or cartridge may fix it. We recommend replacement when:

This is the process we follow on a bath tap replacement. The job-specific details above show how it played out on this Harrow project.

1. Check the bath and the new taps match before starting. Taps have to suit the bath’s tap holes. A bath with two tap holes takes pillar taps or a two-hole deck mixer. A single central hole needs a monobloc mixer. Mismatched hole counts and spacing are one of the most common reasons a swap becomes a bigger job. Wall-mounted taps are a different job altogether, as the pipework runs through the wall.

2. Isolate the water. We shut off the hot and cold supplies to the bath. If there are isolation valves on the pipes beneath the bath, we use those. If not, we close the stopcock and drain down. Fitting isolation valves while the pipework is exposed is a sensible upgrade, since it makes any future tap work quicker and avoids shutting the whole house off.

3. Open the bath panel and get access. Most bath taps are connected from beneath or behind the bath, so the side panel usually has to come off. Access is often the slowest part of the job.

4. Disconnect and remove the old taps. We undo the tap connectors (the nuts joining the supply pipes to the tap tails), release the back nuts or fixings under the bath rim, and lift the taps out. Corroded or seized connectors can need patient work or replacement to avoid cracking the pipe.

5. Clean the surface and prepare the new taps. We clean the old sealant and limescale from the bath surface, fit the new tap washers and seals, and check the tails are the right length and thread.

6. Fit the new taps and reconnect the supply. Taps are seated on the bath, tightened under the rim without over-tightening (acrylic baths can crack), and connected to the supply with fresh sealing washers or flexible tap connectors where the pipework is slightly misaligned.

7. Test for leaks and flow. Water is turned back on slowly. We check every joint, run both taps, check for hot and cold at the correct sides, and check the flow is reasonable. We also check the bath overflow and waste while the bath is filled.

8. Seal and refit. Once everything is dry, we seal the base of the taps where needed and refit the bath panel.

Before ordering taps, find out whether your home has high pressure (mains-fed, or a combi boiler) or low pressure (a tank-fed gravity system with a cold water tank in the loft). A tap or shower mixer designed for high-pressure supply may not perform properly on a gravity system, and the reverse also applies. Check the product specification for the minimum operating pressure. Many period and older properties still have tank-fed hot water, so this is worth checking.

Fittings connected to the mains water supply must meet the Water Supply (Water Fittings) Regulations 1999. WRAS (Water Regulations Advisory Scheme) approval is the usual way of demonstrating that a tap is suitable for UK installations. Taps that are not approved can cause problems with insurance claims and with water company compliance. Bath taps also need to prevent water flowing back into the supply (an air gap above the bath’s overflow level), which approved taps are designed to do.

Costs vary by tap type, access and plumber. Published UK cost guides give a broad market picture:

These are national averages and do not reflect London labour rates, which tend to be higher. Expect the price to rise if:

Harrow has a wide mix of properties: interwar semi-detached houses in areas such as Pinner, Rayners Lane and Kenton, older terraced houses around Harrow on the Hill and Wealdstone, and post-war and modern flats. For bath tap replacement, this matters in a few ways:

Swapping a like-for-like pair of bath taps is within reach of a confident DIYer with the right tools, but call a plumber when:

If the leak is active and you can’t stop it, close the stopcock and call us. See our Harrow emergency plumber for out-of-hours help, or book the work as a planned job.

How long does it take to replace bath taps? Usually one to two hours for a like-for-like swap with working isolation valves. Allow longer if connectors are seized, new valves are needed or the taps need different fixings.

How much does it cost to replace bath taps in Harrow? Published UK cost guides put a typical tap replacement between about £80 and £200, with averages around £100 to £120. London rates and job specifics can push this higher.

Can I replace bath taps myself? You can if you are comfortable isolating the water and working in a tight space, but mistakes cost more than the labour saved. A leak behind a bath panel is easy to miss.

Do I need to drain the water system to replace bath taps? Not usually. Closing the isolation valves, or the stopcock if there are none, and running the taps to empty the pipes is usually enough.

Will any tap fit my bath? No. The number and spacing of tap holes, the thickness of the bath and the tail connections all affect compatibility.

What is the difference between a bath filler and a bath-shower mixer? A bath filler only fills the bath. A bath-shower mixer includes a hose and hand shower, so it needs a diverter and works best when the water supply pressure suits it.

Why is my new bath tap dripping or leaking underneath? The most common causes are an undertightened connector, a missing or damaged sealing washer, or misaligned supply pipes. Turn the water off and have it checked.

Does a bath tap replacement need building regulations approval? A like-for-like tap replacement doesn’t normally need notification, but the taps and any new fittings must comply with the Water Supply (Water Fittings) Regulations 1999.

Can you replace taps on a freestanding or wall-mounted bath? Yes, but these are more involved jobs because pipework often runs through the floor or wall. We quote these separately after assessing access.

Is a dripping bath tap an emergency? A slow drip is not an emergency, but a leak from beneath the bath or a tap that won’t shut off is. Close the stopcock and call us.

OnTime Plumbers replaces bath taps across Harrow and the surrounding area, from simple like-for-like swaps to full bath-shower mixer upgrades. Tell us the type of taps you have now and the ones you’d like, and we’ll confirm the job and price before we start.

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