Running Toilet Repair
Running Toilet Repair
A toilet that trickles into the pan can waste more water than the rest of the house combined and shows up fast on a metered bill. It's nearly always the fill valve or the flush valve seal.
About this service
Running Toilet Repair in South West London, done properly the first time
We test the cistern with dye to confirm whether water is passing the flush valve or overfilling past the float. From there it's a new fill valve, a new flush valve diaphragm or a full valve replacement, set to the correct water line so the toilet flushes properly and stops cleanly.
Kingston upon Thames's hard water scales up valve seals quickly, especially in rental properties where the toilet gets heavy use. Where a cistern has repeatedly failed we fit better-quality valves rather than the cheapest like-for-like, so you're not calling us back next year.
Why Maxfix
Why choose Maxfix for running toilet repair
Premium workmanship, fixed pricing and a service experience built around you.
Dye test to confirm the exact cause
Fill valves, flush valves and diaphragms carried on the van
Water level reset so the overflow can't trickle
Quality valves fitted in hard-water areas
Landlord-friendly invoicing and 12-month guarantee
How it works
A calm, four-step process
From the first call to a tidy handover — no surprises, no jargon, no mess.
Get in touch
Call us or send a quick enquiry — we'll respond within an hour during working hours.
Free survey & quote
An engineer assesses the work and gives you a clear, written, fixed-price quote.
Book a date that suits you
Choose a slot that fits around your schedule — we work evenings and weekends.
Work completed cleanly
Uniformed engineers carry out the work, tidy up fully and walk you through everything before leaving.
Get a fast quote for running toilet repair
Free, no-obligation quotes. Most calls answered within 30 seconds.
Trusted experts
Why choose Maxfix
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited [to be confirmed]
[accreditations to be confirmed]
Open 24 Hours, Every Day
Call any time — including nights and weekends
Fixed Price, Always
Agreed before we start — no hourly creep
Frequently asked
Your questions, answered
How much water does a running toilet waste?
A steady trickle can waste 200–400 litres a day. On a water meter in Kingston upon Thames that adds up quickly, so the repair usually pays for itself within months.
Why does my toilet refill on its own now and then?
That's a slowly leaking flush valve seal letting the cistern drain into the pan until the fill valve kicks in. Replacing the seal or valve fixes it.
Can you repair concealed and back-to-wall cisterns?
Yes — we work on concealed frames and back-to-wall units regularly, accessing through the flush plate where the design allows.
Do you carry parts for older cisterns?
We carry universal fill and flush valves that suit most older Kingston upon Thames cisterns, so the majority of jobs are completed on the first visit.
Which areas of South West London do you cover for running toilet repair?
We provide running toilet repair across the whole of South West London, including Kingston upon Thames, Richmond, Wimbledon, Twickenham, Surbiton, Fulham, Putney, Teddington, New Malden, Molesey, Hounslow, Brentford, Isleworth, Long Ditton, Worcester Park, Roehampton, Raynes Park, Morden, Petersham, Motspur Park and the surrounding KT, TW and SW postcodes. Local engineers means short call-out times wherever you are.
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Ready when you are
Book running toilet repair with a Gas Safe engineer — fixed pricing, open 24 hours.
Related repairs
Common bathroom & wc plumbing faults we fix in Kingston upon Thames and across South West London — plus the wider room-by-room services these repairs sit under.
Running Toilet Repair near you
Ready to book?
Book running toilet repair today
Free quotes, fixed pricing and Gas Safe engineers across Kingston upon Thames, Richmond, Wimbledon, Twickenham and the rest of South West London.