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A dripping or stiff tap is usually a quick fix — but a new tap, and especially an outdoor tap, is regulated work, and Woolwich’s hard water wears tap cartridges and washers faster than most. This page covers repairing and replacing taps properly, and the water rules a good installer works to.
On a first visit a plumber can usually put right the common faults on the spot — a worn washer or ceramic cartridge, a perished O-ring, a clogged aerator, a tired flexi tail or a loose fixing — after first checking the isolation valves under the sink actually shut off, which in Woolwich’s hard water can themselves be scaled or stiff. Replacement beats repair where a cartridge is obsolete, the tap body is corroded, or the same tap has been back more than once.
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A dripping or stiff tap is often a small job — but new taps and garden taps must meet the water fittings rules, and hard water wears cartridges fast here.
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Tap problems we fix across Woolwich
Taps fail in a small number of ways, and most are cheaper to catch early. A drip from the spout is a worn washer or, on a modern mixer, a worn ceramic cartridge. A stiff or seized handle is usually scale binding the cartridge or spindle. Low flow from one tap points to a clogged aerator or a partly seized isolation valve; noisy or juddering taps often mean a loose washer or a pressure issue. A weeping base or a loose tap means perished seals or fixings that have worked loose — minor, but it lets water track under the sink where you can’t see it.
One quick self-check before you assume the tap is the problem. Thames Water advises trying the cold kitchen tap first: if water comes from there but not elsewhere, it’s very likely an internal plumbing issue and you should contact an approved plumber or your landlord; if neighbours aren’t affected either, that again points to your own plumbing rather than the network. That one test separates a genuine tap or supply-pipe fault from a wider water-supply problem.
Where the water is appearing somewhere you can’t trace — under the floor, behind a unit, or as damp with no visible source — that’s leak detection rather than a tap swap, and worth handling as such before anything is dismantled.
Hard water is why Woolwich taps drip and stiffen
If your taps seem to need attention more often than you’d expect, the water is the reason. Thames Water describes its whole region as hard water and says it can leave a chalky limescale residue on taps, showers and appliances. Taps take the brunt of it because every working part is in the flow.
Scale forms on the ceramic cartridge, the washer seat, the aerator and the spindle, so a Woolwich mixer stiffens, starts dripping, or loses flow noticeably faster than the same tap would in a soft-water area — the Drinking Water Inspectorate confirms hard water scales up systems and appliances and leaves marks on basins, sinks and baths. Often the honest fix is a new cartridge and a cleaned aerator rather than a whole tap; a good plumber will tell you which.
A softener cuts that wear across the home, with the standard caution: Thames Water doesn’t recommend softened water for drinking or cooking, advises keeping a separate hard-water tap for it, and says the softener and its plumbing should be inspected regularly by an approved plumber. If a softener is on your list, that separate drinking-water tap is part of doing it correctly — see our London hard water guide.
Installing or replacing a tap — the water fittings rules
Swapping a tap looks trivial. Doing it compliantly isn’t automatic, and it’s where a verified installer earns their place.
New and replacement taps fall under the Water Supply (Water Fittings) Regulations 1999, which set national requirements for the design, installation and materials of water fittings to prevent waste, misuse and contamination of the supply. Two things matter in practice. First, fittings and materials must be of an approved quality. Second, advance notification is only required where the work falls within Regulation 5’s listed operations — an ordinary domestic tap replacement is not automatically notifiable. If an approved contractor carries out the work, they can issue a certificate of compliance, and the Regulation 5 notice/certificate process applies where the work is notifiable.
WaterRegsUK sets out that an approved contractor is a member of one of the recognised approved-contractor schemes and can self-certify that work complies with the regulations, sending a certificate to both the customer and the local water undertaker. For a straightforward Woolwich tap change that certificate rarely comes up — but for anything the supplier could question later, having an installer who can issue one is genuinely useful.
Outdoor taps, garden taps and backflow
An outside tap is the one tap job where the rules bite, because a garden hose is a contamination risk to the drinking-water supply.
Under the Water Supply (Water Fittings) Regulations 1999, backflow prevention appropriate to the fluid-category risk must be provided, and taps to which a hose can be connected in a garden must be protected against backflow. In practice a hose union (outside) tap is treated as a fluid-category-3 risk, so a double check valve is used as point-of-use backflow protection — fitted inside the property and protected from freezing; higher-risk uses may require stronger protection. Installing a garden tap isn’t just drilling through the wall and teeing off; done properly it protects your mains from garden chemicals siphoning back, and it’s exactly the kind of work where an approved contractor can certify compliance.
If your tap job is really part of a wider kitchen or bathroom project, or connecting an appliance, it’s better handled under kitchen plumbing, bathroom plumbing or washing machine & dishwasher installation.
New taps and scald safety in newer Woolwich homes
Woolwich has substantial new-build and regeneration activity — a designated Opportunity Area with major regeneration and new-build activity around Royal Arsenal, Woolwich Exchange and the estate-renewal schemes. That makes one hot-water rule locally relevant in a way it isn’t everywhere.
The government’s Approved Document G guidance requires the hot water supplied to a bath to be limited to no more than 48°C, and this applies to baths in new homes, including those created by a change of use — not to existing homes. It’s normally met with a thermostatic mixing valve on the bath supply. So if you’re fitting or replacing taps in a newer Woolwich apartment or a converted building, the bath side may need that temperature limiting — a competent installer will know whether your home is caught by it.
The same guidance is careful about existing homes: it says the 48°C bath requirement doesn’t apply to existing homes, but that people may want to consider a thermostatic mixing valve or similar when adding or replacing a bath, particularly where the very young or very old are in the household. It’s a sensible option to raise on any bath-tap job, not a blanket requirement to oversell.
Who’s responsible — owner, leaseholder, tenant or council?
In a flat — whether a Royal Arsenal Riverside apartment or a converted house elsewhere in Woolwich — a weeping tap base can track under the units or into the ceiling below before it’s obvious, so the plumber should check the isolation valves, flexi tails and seals before assuming the tap body itself has failed; where it has leaked to the flat below, it can become a leaseholder or insurance matter as much as a repair.
In older Woolwich houses and conversions, a tap job can be slowed by old copper, seized isolation valves or pipework boxed in behind kitchen units, so the first job is often getting a clean shut-off before the repair itself. Where the tap’s brand or model is unknown, a plumber identifies the cartridge from the tap itself; if it’s unusual or obsolete and not stocked, it’s better to identify the correct part and return than to force a poor match.
Quick routing, because it decides who arranges the work. Owner-occupiers just book it. Royal Greenwich council tenants: the council is responsible for taps, basins and sinks it installed, so tap faults on council-fitted plumbing go through the council’s repairs route. Royal Greenwich leaseholders: taps and pipework inside the home are the leaseholder’s responsibility. Private tenants: GOV.UK says landlords are always responsible for sanitary fittings including pipes, so report a faulty tap to the landlord. In housing-association or managed Royal Arsenal blocks, use the provider’s or managing agent’s repairs line.
Why verified plumbers
Fitting a tap — especially an outdoor one — is regulated work that protects your drinking water, so who does it matters. Every plumber here is checked before listing: identity and address, relevant qualifications, insurance, a Companies House and trading-presence check, and reputation, with Gas Safe confirmed where a job touches gas. Listings show a workmanship guarantee badge — 1, 3, 6 or 12 months — offered by the plumber. Where a job needs Water Fittings Regulations compliance, you can also ask a plumber whether they’re a WaterSafe-registered approved contractor able to certify the work.
Verification is a point-in-time check, so confirm current insurance for your specific job. Verified Plumbers is an introduction directory, not a party to your agreement — you contact the plumber directly, with no customer booking fee and no pay-to-play ranking (any Sponsored placement is labelled). Listings are re-verified annually and removed if standards slip.
Related in Woolwich
Services: Leak detection · Kitchen plumbing · Bathroom plumbing · Washing machine & dishwasher installation · General plumbing
Areas: Plumbers in Woolwich · Royal Borough of Greenwich — covering the town centre, Royal Arsenal / Woolwich Riverside, Woolwich Common and Woolwich Dockyard.
Guides: London hard water guide · Find your stop tap · Plumbing costs guide · How to read a plumbing quote
Tap repair & installation in Woolwich — FAQs
Woolwich is in Thames Water’s hard-water region, and scale builds on the washer seat and ceramic cartridge, so a like-for-like part can drip again quickly.
A lasting fix usually means the correct cartridge or washer plus a cleaned aerator, not just a swap.
New and replacement taps must comply with the Water Fittings Regulations, but advance notification is only required where the work falls within Regulation 5’s listed operations — an ordinary domestic tap replacement is not automatically notifiable.
An approved contractor can issue a certificate of compliance, and the notice/certificate process applies where the work is notifiable.
No — it’s the tap job most tied to the rules.
The Water Fittings Regulations require backflow protection (commonly a double check valve) on a garden tap a hose can connect to, plus frost protection, to stop garden water siphoning back into your drinking supply.
Thames Water advises checking the cold kitchen tap: if water comes from there but nowhere else, it’s very likely internal plumbing, so contact an approved plumber or your landlord rather than assuming a network fault — especially if neighbours aren’t affected.
In new homes (including change-of-use conversions), Approved Document G requires bath hot water to be limited to 48°C, usually via a thermostatic mixing valve.
It doesn’t apply to existing homes, though a TMV is worth considering where very young or very old people use the bath.
Yes.
GOV.UK says private landlords are always responsible for sanitary fittings including pipes, so a faulty tap is the landlord’s to fix.
Royal Greenwich council tenants and leaseholders have their own routes depending on who installed the fitting.
Last reviewed: May 2026 by Adiel Khan — SFEDI-accredited business advisor, 20+ years’ experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. LinkedIn ↗ (https://www.linkedin.com/in/adiel-khan-567a85b/) Adiel is a verification specialist — not a practising plumber or gas engineer. Every regulatory, routing and local fact on this page is drawn from the primary sources listed below and checked against them, not from generic copy. How we verify plumbers →
Sources
1. Legislation.gov.uk — The Water Supply (Water Fittings) Regulations 1999. <https://www.legislation.gov.uk/uksi/1999/1148/made>
2. Legislation.gov.uk — The Water Supply (Water Fittings) Regulations 1999, Schedule 2 (backflow prevention). <https://www.legislation.gov.uk/uksi/1999/1148/schedule/2/crossheading/backflow-prevention/made>
3. Thames Water — Hard water. <https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water>
4. Thames Water — No water or low pressure. <https://www.thameswater.co.uk/help/water-and-waste-help/no-water-or-low-pressure>
5. Drinking Water Inspectorate — Water hardness / hard water. <https://www.dwi.gov.uk/consumers/learn-more-about-your-water/water-hardness-hard-water/>
6. WaterSafe — Hiring a plumber / verifying qualifications. <https://www.watersafe.org.uk/advice/hiring_a_plumber/verifying_qualifications/>
7. WaterRegsUK — Approved contractors. <https://www.waterregsuk.co.uk/topics/approved-contractors/>
8. GOV.UK — Approved Document G (Part G) FAQ. <https://assets.publishing.service.gov.uk/media/5a81a884e5274a2e8ab552a5/160321_Part_G_FAQ.pdf>
9. Royal Borough of Greenwich — Who can repair your problem if you’re a tenant. <https://www.royalgreenwich.gov.uk/housing/request-repair/request-repair-your-council-home/who-can-repair-your-problem-if-youre-tenant>
10. Royal Borough of Greenwich — Who can repair (leaseholder). <https://www.royalgreenwich.gov.uk/housing/request-repair/request-repair-your-leasehold-home/who-can-repair>
11. GOV.UK — Private renting: repairs. https://www.gov.uk/private-renting/repairs <https://www.gov.uk/private-renting/repairs>