Guide hub
Thames Water
The letter, the four-week window, the allowance, and exactly where Thames Water’s pipe stops being their problem and starts being your repair bill.
Thames Water Lead Pipe Replacement: What They Replace and What You Pay For
Thames Water will replace their lead communication pipe when you replace yours. What the scheme covers, the criteria, the trench spec, and the subsidy figure you should ignore.
What a WaterSafe Approved Plumber Actually Is
Not a quality badge. A WaterSafe approval is a water regulations qualification that lets a plumber self-certify work and hands you a statutory legal defence. Here is what it covers and what it does not.
Is There a Thames Water Approved Plumber List?
Thames Water does not certify plumbers itself. Its approved plumbers link points at the WaterSafe register, and its own disclaimer sets out exactly how far that recommendation goes.
Section 75 Repair Notices: The Deadline, and What Happens If You Miss It
Thames Water gives you four weeks to fix a leak. The Water Industry Act gives them the power behind it. What a Section 75 notice must contain, what the deadline really is, and what they can do next.
Water Leak Outside the House: Where Their Pipe Ends and Yours Begins
The boundary stop tap, the communication pipe and the supply pipe, drawn properly. Who pays for a leak in the front garden, under the pavement, or on a shared supply in a London terrace.
Thames Water Says You Have a Leak: What to Do Next
A letter or email saying a leak has been detected at your property starts a four-week clock. How to confirm it yourself, work out whose pipe it is, and close it out properly.
Shared Supply Pipe Leak: Who Pays, and How to Settle It
One pipe, several houses, and a leak somewhere along it. What Thames Water says about joint responsibility, how to tell whose branch it is on, and why locating the leak decides who pays.
Thames Water leak allowance: who gets one, and how to claim
What the Thames Water leak allowance covers, the four-week and three-month deadlines, the evidence they ask for, and what usually gets a claim refused.
Thames Water leak detection: what they will and will not do
Thames Water hunt leaks across their own network and sometimes flag one at your property. What they check, what they pay for, and where your own bill starts.
Thames Water approved contractor: what the approval covers
Thames Water approves nobody directly. "Approved contractor" is a legal term with a narrow scope, and most supply pipe work sits outside it. Here is the detail.
How to Report a Leak to Thames Water (and When Not To)
Water in the street is theirs and free to report. Water inside your boundary starts a four-week clock. How to tell which one you have before you call.
Thames Water leak allowance form: prepare and submit it
Find the official Thames Water leak allowance form, organise repair evidence and meter readings, and keep a clear record of your household application.
Thames Water leak allowance rejected: evidence and next steps
Identify why a Thames Water leak allowance was refused, correct missing evidence and follow the complaint route with a clear repair and meter-reading record.
Thames Water leak allowance calculation: check readings and credit
Check a Thames Water leak allowance using meter intervals, a normal-use baseline and the correct bill charges, with worked examples and questions for a review.
Thames Water leak allowance for tenants: accounts, repairs and evidence
Coordinate a rented-home leak allowance between tenant, landlord and Thames Water. Keep account responsibility, repair approval and the evidence trail separate.
If you need the repair
Other guide hubs
Boiler & Heating Pressure
A sealed system that will not hold pressure is losing water somewhere. What each fault code means, and how to find where it is going.
Water Bills & Meters
Reading the meter to prove a leak, what an unexplained jump actually costs you per day, and the evidence a water company wants before it grants an allowance.
Insurance Claims & Trace and Access
Written from the engineer’s side: what the loss adjuster asks for, what a trace report must contain, and what gets a claim declined.
Field Notes
What we actually find on London leaks, what the law and the insurers changed this year, and the jobs worth writing up.
Hot Water, Cylinders & Tanks
Cylinders, storage tanks and the discharge pipes that give them away. Written from the leak end: what is losing water, where it is going, and what it costs to put right.