Dripping Tap Repair: Causes, Compatible Parts and Costs

Start with where the water is going

A tap dripping into a freely draining basin needs attention, but it is a different situation from water running into a cupboard or through a ceiling. Describe the exit point first: the end of the spout, around a handle, at the rotating spout joint, around the base or beneath the sink. “Leaking mixer” alone leaves several different jobs possible.

For an active escape outside the bowl, stop using the fitting and close its known water isolation or your own stop tap if safely accessible. Do not force a seized valve. Keep away from any wet electrical equipment. If you cannot stop the escape safely, request urgent help and explain where the water is spreading. A container beneath a drip is temporary containment, not a repair or a reason to leave an unattended leak running.

If water remains contained in the bowl, do not tighten the handle progressively harder in an attempt to stop it. Note whether it closes normally, has become stiff or now moves differently. Those observations help distinguish a closing fault from a handle or assembly problem without dismantling anything. Also tell the repairer if the basin drains slowly: a drip landing in a blocked bowl has a different overflow risk from one entering a working waste.

Source: WaterSafe: safe isolation, suitable materials and when to hire a plumber

A brief after-drip and a tap that never stops are different

Some water can remain in a spout after the control is closed and drain out afterwards. Bristan describes this in its support guidance as spout drainage. A short-lived release therefore does not automatically establish a failed valve. However, a continuing drip or trickle needs a different assessment; do not use that explanation to dismiss a tap that regularly continues leaking when nobody has used it.

Describe the behaviour you already see. Does it stop completely, then remain dry until the next use? Does it continue at a steady rate? Has the pattern recently changed? Is water coming only from the outlet, or also from around the body? Avoid inventing a universal number of seconds after which every tap must be faulty, because the outlet and internal arrangement vary.

This distinction is particularly useful after a repair. If the original continuous leak has become a brief release of retained water, the observed result differs from a continuing supply leak at a slower rate. Ask the repairer to explain which condition remains and why. A claim that a tap is fixed should account for its actual behaviour and any external escape, rather than relying on a quick glance immediately after the handle is closed.

Source: Bristan: dripping products and residual spout drainage

Washer, valve or cartridge: the tap design determines the part

Traditional washer-type taps close against a sealing surface, while ceramic valve designs use a different mechanism. A single-lever mixer has an assembly controlling mixed flow rather than simply the same arrangement as two separate pillar taps. The word “washer” is often used loosely in repair requests, but buying a packet of rubber washers does not establish that your tap can be repaired that way.

Bristan’s older Basin, Bath and Sink Taps instructions distinguish spindle leakage from outlet dripping and refer to seating and washer maintenance. Its J BAS C (D12) mixer instructions instead identify product-specific cartridge servicing and spares. These are examples of why instructions must match the actual fitting, not a universal procedure for removing every handle or valve.

Handle movement can help describe a tap, but it should not be your only identification method. A traditional-looking crosshead may conceal a different valve from the one you expect, and a previous repair may have changed the internals. Give the brand, product reference and available paperwork to the person sourcing parts. If those are missing, send an overall photograph and explain how the controls operate. Do not remove the head just to make a booking enquiry; part identification can be planned with safe isolation and the correct tools.

Sources: Bristan: traditional tap maintenance distinctions · Bristan J BAS C (D12): product-specific instructions

A leak at the base may need a different repair from a spout drip

The closing mechanism controls water reaching the outlet. Other seals and connections keep water inside the fitting on its route there. That is why a part chosen for a constant spout drip may not resolve water escaping at a spout joint or beneath the tap. Hansgrohe’s consumer guidance explicitly distinguishes persistent outlet dripping from escape at the base or lever cap and directs the latter to a plumber.

One DIYUK owner reported a puddle around a mixer’s base. Changing a cartridge did not resolve it, and replacing spout seals reportedly made it worse. The opened account did not establish whether the parts, assembly or tap body were responsible. It should not be read as proof that the whole tap needed replacing, or that a particular seal would definitely have fixed it.

Tell the repairer whether the wet area appears while the tap runs, after use or while it is unused. Note any visible water higher up rather than assuming a puddle began where it collected. Do not rotate or flex the tap to provoke the leak. If the whole fitting is loose, mention that separately; a loose mounting and an internal water leak can need different attention. The assessment should identify both instead of treating a tightened mounting as proof of a watertight repair.

Sources: hansgrohe: outlet drips and leaks at the tap body · Homeowner account: base leak after cartridge and seal changes

Compatible parts must fit the controls as well as the tap body

Matching the general appearance of a cartridge is not enough. The replacement needs to be intended for the fitting and work with its handle, retaining arrangement and seals. A part can appear to screw into place yet leave the control sitting incorrectly or operating in an unexpected direction. Ask how compatibility has been established before authorising a trial-and-error parts purchase.

Hansgrohe’s spare-parts system uses product identification and drawings to select components. That is a stronger starting point than ordering the first cartridge described as “universal”. Where the model is uncertain, the supplier or repairer may need the original component’s details. Agree how that identification will be handled and how the supply will be left safe while a replacement is sourced.

A DIYUK homeowner who replaced bath and basin cartridges reported a remaining drip and replacement parts taller than the originals, leaving handle movement. A separate DIYnot owner reported stopping a drip with a cartridge that made the control turn the wrong way, with correct parts still intended later. These are unverified experiences, not approved repair methods. They illustrate why “water stopped” and “the tap is correctly repaired” are not identical outcomes. A finished repair should leave normal control operation as well as a sound seal.

Sources: hansgrohe: identifying spare parts · Homeowner account: taller replacement cartridges and remaining drip · DIYnot: reported stopped drip with wrong control direction

If a new part has not stopped the leak, reassess before tightening harder

A failed replacement leaves several questions open. Was the original leak correctly located? Was the replacement the correct part? Was it assembled as specified, and is the surrounding component in a condition that allows it to seal? These questions are more useful than assuming that the new item is faulty or that another turn with a larger tool will solve the problem.

Keep the old part, new packaging and receipt where available. Tell the next repairer exactly what changed: a valve, complete cartridge, spout seals or the entire tap. State whether the original leak stayed the same, slowed down or moved to a different location. A new leak after work deserves its own description rather than being grouped into “still dripping”.

Do not add tape, sealant or a lubricant from another household task to compensate for an unexplained mismatch. Product-specific servicing instructions may specify a particular treatment, but that does not make it suitable for every material or water-contact component. Likewise, cleaning visible scale on the outside is not proof that an internal sealing problem has been addressed. If you have already used a product or altered a part, disclose it. The contractor needs that history to assess what can be retained, what should be replaced and whether further work is sensible.

Know the limit of an ordinary tap repair

Some identified taps have maintenance that a capable owner can carry out with the correct instructions and effective isolation. This guide does not provide a universal dismantling sequence. If you cannot establish the tap model, isolate all relevant supplies or remove a part without force, stop and arrange help. A seized shroud or valve can turn a small drip into a more disruptive problem if the fitting or connected pipework moves.

WaterSafe advises using a qualified professional unless you are confident about safe isolation and suitable materials. Safe preparation for an enquiry can remain external: find paperwork, clear a dry cupboard for access and photograph visible connections. Do not pull an appliance out across a wet floor or put your hand into a space containing wet electrical equipment to find a valve.

Boiling-water, filtered, electronic and specialist appliance taps need their own product instructions and service route. A control on the sink may connect to equipment underneath, so do not treat it as a conventional two-feed mixer simply because it looks similar. Tell the provider what functions it supplies and whether an electrical unit is present. Do not open a reservoir, bypass a safety control or assume the ordinary plumbing hourly price defines the full scope of that specialist repair.

What does a dripping tap repair cost with AK?

AK’s published callout fee is £60 for engineer attendance. Ordinary plumbing work is £160 per hour, with the work and hourly quote agreed before proceeding. No VAT is added because AK is not VAT-registered. The attendance fee does not include a promised diagnosis, a replacement part or a completed repair, so it should not be read as “tap repair for £60”.

For a straightforward arithmetic example, attendance plus one full hour of ordinary plumbing is £220 before any separately agreed parts or additional work. That is not a fixed price for your tap, a promise that the job takes an hour or a statement of the minimum charging period. Confirm the time charging arrangement, parts and any return visit before the work begins. A job requiring specialist equipment or work outside ordinary plumbing needs its own agreed scope.

The size of a drip does not tell you the labour involved. Accessible parts in an identified tap present a different job from a seized fitting behind a bath with unavailable spares. Ask which uncertainty could change the estimate and when you will be consulted. If the tap cannot be repaired during the first attendance, establish what has been learned, whether it can safely remain in use and what the next visit would cover.

Compare a repair and a replacement on the same basis

A repair may be attractive when the fault is identified, compatible parts are available and the rest of the tap is serviceable. Replacement becomes a reasonable option to discuss where damage, repeated unresolved faults or unavailable parts make further repair uncertain. There is no universal age or cartridge-price threshold that decides this for every fitting, and an unfamiliar brand alone does not prove it cannot be repaired.

Compare the total proposed work. A repair quotation should identify the parts and expected labour; a replacement quotation should identify the new tap, connections, access and any work needed to fit it. Do not compare the retail price of a new tap with an installed repair price. The low shelf price does not include removing the existing fitting or resolving awkward access beneath the basin.

If replacement is chosen, the new product must suit the water system and installation. Bristan directs purchasers to check product operating requirements rather than assuming every design works on every supply. Ask about mounting holes, spout reach, usable handle clearance and the existing connections as well as appearance. A replacement that fits the hole but performs poorly is not a useful resolution. Keep the final choice specific enough that the installer and customer are agreeing to the same product and scope.

Check access and support options before buying parts

Photographs of the tap above the sink and the accessible area beneath help define the job. Include whether it is mounted through a worktop, basin, bath rim or wall. A concealed fitting may require a different access plan from a freestanding pair of taps. Tell the plumber if an isolation valve is missing, stuck or previously leaked, without attempting to force it as a test.

If the tap was installed recently, retain the installation invoice and contact the installer or manufacturer about applicable support. Guarantee terms depend on product, purchase date and exclusions; do not assume every leak or every labour charge is covered. Bristan’s current FAQ, for example, distinguishes manufacturing cover from damage associated with scale or debris. Ask what evidence is required before purchasing replacement parts independently.

For rented or managed premises, establish who can approve the work and the replacement model if one is needed. A tenant reporting a drip should not have to diagnose the cartridge to make a useful repair request. Give the symptom and accessible photographs, then let the authorised person arrange scope and access. If active water escape makes the situation urgent, say so clearly rather than allowing a routine dripping-tap description to hide the risk to the property.

A completed repair should leave a watertight, usable fitting

Ask the repairer to explain what failed and what was done. The check should cover the reported outlet drip and any escape around the body or connections, with the controls operating normally. If a handle now sits loose, turns unexpectedly or needs unusual force, raise it before treating the job as complete. A makeshift way of holding a control closed is not the same as restoring normal operation.

Keep the replacement part reference and any maintenance instructions with the invoice. That saves uncertainty if the tap needs attention again and allows the next person to distinguish the original equipment from a later modification. If another problem remains, such as a loose mounting or an inaccessible connection requiring further work, have it recorded separately rather than hidden behind a general “tap repaired” description.

Follow the fitted product’s cleaning guidance. A cleaner acceptable on surrounding tiles may damage the tap finish, and an internal servicing method for one manufacturer should not be applied indiscriminately to another. There is no need to dismantle a working tap simply because a forum recommends a routine modification. If dripping returns, record whether it is the same outlet symptom or a new external leak and how long normal operation lasted. That makes the next assessment more useful than starting again with an unidentified spare part.