Bath Tap Problems (Pillar Taps, Bath Fillers — Dripping and Replacement)
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Post a job — we'll find you an engineer →If your bath taps are on a combination boiler system, the hot water is mains pressure. On older gravity-fed systems with a cold water storage tank in the loft, the pressure is much lower. Know which system you have — it affects which taps and cartridges are compatible.
Bath taps take a real battering — they're used more frequently and at higher flow rates than any other tap in the house, which is why drips and leaks are so common. Whether you've got traditional pillar taps that your parents probably installed, a modern mixer tap, or a stylish bath filler, the good news is that most bath tap problems are straightforward to fix without calling a plumber. The culprit is usually a worn rubber washer or a tired ceramic disc cartridge, both of which are inexpensive and quick to replace if you're reasonably handy. This guide walks through identifying what type of tap you have, diagnosing whether it's a simple washer replacement or something more involved, and tackling the job yourself — with a realistic note on when professional help is worth the cost, particularly if your taps are awkwardly positioned or your home has an unusual water pressure setup.
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Most likely cause & what to check
Bath taps fall into three main types: traditional pillar taps (separate hot and cold), bath/basin mixers (a single body with two handles feeding one spout), and bath fillers (which sit in the middle of the bath or on the rim and may include a handshower diverter). Pillar taps are the most common in older UK properties and use a traditional rubber washer on a brass jumper to seal against a brass tap seat. Mixers and bath fillers usually use ceramic disc cartridges. A dripping bath tap from the spout when closed is a washer or cartridge fault. Water leaking from around the handle base or gland is a packing gland fault.
For a dripping traditional pillar tap (the type with a cross-head or capstan handle), turn off the water at the isolating valve under the bath or, if there is none, at the rising main. Remove the handle — prise off the index disc (hot/cold marker), undo the retaining screw underneath, and pull the handle off. Unscrew the headgear nut (the large hexagonal brass nut) anticlockwise using an adjustable spanner. The entire headgear assembly will come out, with the rubber washer at the bottom held on by a brass nut. Replace the washer with the correct size (3/4" for most bath pillar taps — packs are available from Screwfix for under £2). If the tap seat is scored, regrind it with a tap reseater tool before fitting the new washer.
For a dripping bath mixer tap, the process is similar to basin mixer cartridge replacement (see the basin mixer tap dripping guide), but bath mixers are often larger and the cartridges can be harder to reach. Some bath mixers are installed with the tap body mounted on the bath deck, while others are wall-mounted with long supply tails. On wall-mounted bath taps, the cartridges are accessed through the front of the tap handles — remove the handle cap, unscrew the handle retaining screw, remove the handle, then unscrew the cartridge retaining collar.
If you are replacing both bath taps (a common decision when renovating), fitting new taps to an existing bath requires accessing the underside of the bath. On many UK baths (acrylic or steel), there is a removable side panel — take this off to access the tap back nuts and supply connections. Bath tap back nuts are notoriously difficult to access and a basin wrench or purpose-made tap back nut spanner (Screwfix, approximately £12) is essential. If the existing connections are old copper olive-type compression fittings, consider replacing them with flexible braided tap connectors at the same time — they are much easier to work with in confined spaces.
When fitting new bath taps, always use new tap washers (supplied with the taps), apply PTFE tape to any threaded connections, and use silicone sealant around the base of the tap bodies where they contact the bath surface to prevent water ingress. Torque the back nuts firmly but not excessively — overtightening can crack acrylic bath decks. Check all connections for leaks before replacing the bath panel.
A note on bath filler taps: freestanding bath fillers (the floor-standing or bath-rim type popular in boutique bathrooms) are plumbed directly from the floor or wall and often require a minimum dynamic pressure of 1.0 bar to function correctly. On gravity-fed systems this is often not achieved. If your bath filler dribbles rather than fills enthusiastically, the issue may be insufficient pressure rather than a fault — a pump on the hot and cold supplies may be necessary. Check the tap manufacturer's minimum pressure specification before purchasing or before diagnosing a fault.
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Frequently asked questions
Why is my bath tap dripping when it's turned off?
A dripping bath tap almost always means the seal inside has worn out — either a rubber washer (on traditional pillar taps) or a ceramic disc cartridge (on modern mixers and fillers). These seals deteriorate over time with constant use and mineral deposits. Replacement is usually a simple 20-minute job and costs just a few pounds for parts.
Is water leaking from around the base of my tap handle — is this serious?
This is typically a packing gland leak, not a cartridge or washer fault. It means water is escaping around the handle stem rather than flowing through the tap. Whilst not urgent, it should be addressed to prevent water damage under the bath and it usually requires tightening or replacing the packing gland — a quick fix for anyone comfortable with basic plumbing.
Do I need to turn off my water supply to fix a dripping bath tap?
Yes, always isolate the water supply first. Most baths have isolating valves (stopcocks) under the bath on both hot and cold supplies — turn these clockwise to shut off the water. If there are no isolating valves, you'll need to turn off at the main stopcock (rising main), which is a good reminder to fit isolation valves if you haven't already.
My bath filler tap is running very slowly — is it broken?
Not necessarily — freestanding bath fillers need a minimum water pressure (usually around 1.0 bar dynamic pressure) to work properly, and many older gravity-fed systems simply don't deliver this. Check your tap's specification sheet; if pressure is the issue, a pump on your supply may be needed rather than a cartridge replacement.
Can I replace my bath taps myself or do I need a plumber?
If you're comfortable with basic tools and your bath has accessible underside panels, replacing taps is a decent DIY job — the main challenge is reaching the back nuts under the bath, which requires a proper basin wrench or tap spanner. If access is very tight or you're uncertain about water connections, a plumber's hour or two will save frustration and reduce the risk of leaks.
What's the difference between my water pressure system and why does it matter for bath taps?
Older homes with a cold water tank in the loft use gravity-fed (low-pressure) systems, whilst newer homes with combination boilers have mains-pressure hot water. This affects which cartridges and tap types are compatible — mains-pressure systems need different internals to handle the higher pressure, so always check your system type before buying replacement parts.