Emergency Plumbing & Boiler Repair · Mitcham, London
Toilet & Tap Repair in Mitcham, London
A cistern that trickles all night, a tap that drips onto the basin until the stain will not scrub off, a mixer that sprays sideways: none of these is an emergency, which is why they are put up with for months. Yet a running toilet can waste a surprising amount of water and a dripping tap adds up on a metered bill. Emergency Plumber and Boiler Repair arranges toilet and tap repair across Mitcham, from a ten-minute washer to a full tap swap.
Mitcham's water explains most of it. Thames Water's 2024 report for the Mitcham supply area gives hardness of 262 mg/l as calcium carbonate, and limescale builds up on tap seats, ceramic disc cartridges, shower valves and the float valve inside a cistern. A hard-water supply wears these parts out faster than soft water does, and a descale or a new cartridge usually solves what looks like a mysterious fault.
Typical costs, from published 2026 UK guides, run about £80 to £200 for a plumber to replace a tap, with a basin tap about £100 to £180, a kitchen mixer about £130 to £220 and a bath tap about £150 to £250. These are guides, and the partner's written quote before work is the only figure that counts. Parts for toilet repair are modest, and the labour is the main cost.
Toilets and taps are covered by the Water Supply (Water Fittings) Regulations 1999, which exist to stop contaminated water flowing back into the supply and to prevent waste. That is why a cistern needs a working overflow and an air gap, why taps need to be fitted with the right backflow protection and why a partner plumber replaces fittings rather than improvising.
Mitcham's older homes add small complications: Victorian and Edwardian terraces with original isolation valves that have seized, 1930s bathrooms with cisterns and taps of several generations, and 1960s estate flats where the cistern may be a close-coupled modern unit. The same number reaches St Helier and Morden, Wandle-side Colliers Wood and Totterdown Fields and Tooting. Call 07897 016796 to book a visit.
What We Do
The Toilet and Tap Faults Hard Water and Age Produce
Most repairs are small parts, and most faults have a recognisable cause.
Running, Slow-Filling and Leaking Cisterns
A cistern that runs on is usually a worn flush valve seal, a float valve stuck open or scale on the valve seat. The plumber replaces the fill valve, flush valve or seal, and checks the overflow pipe. If the pan itself is blocked rather than the cistern faulty, the route is our blocked drains page.
Dripping Taps, Stiff Handles and Weak Flow
A drip usually means a worn washer or ceramic cartridge, and weak flow points to scale in the aerator or the cartridge. The plumber isolates the tap, replaces the part and, if the tap is old or corroded, recommends replacing it. Modern ceramic disc taps are less prone to wear but are still hit by scale.
Mixers, Shower Valves and Tap Replacement
Sprayed handles, loose spouts and tired mixers are often cheaper to replace than repair. Tap swaps run from about £100 to £250 depending on type and position. Where the isolating valves under the sink have seized, the plumber will fit new service valves so the next repair is simpler.
The Benefits
Repair It, Descale It or Replace It: Making the Call
A small part is often enough, but sometimes the fitting is past saving.
When a Part Is Enough
A new washer, cartridge, fill valve or flush valve restores most taps and cisterns for a modest sum. If the body of the fitting is sound and parts are available, repair is the sensible route.
When Descaling Helps
On a hard-water supply, scale in an aerator or on a valve seat can be cleared with descaler, which restores flow without replacement. A partner will tell you if that is likely to hold or if the part is worn.
When Replacement Is the Honest Answer
A corroded body, a cracked basin or toilet pan, a leaking spindle or a discontinued tap model often means replacement. The partner gives the repair and replacement prices side by side in the written quote.
Why Us
How We Arrange Small Plumbing Jobs Properly
Small jobs deserve the same clear process as emergencies.
Bundling Jobs Into One Visit
If you have a dripping tap, a running cistern and a seized valve, tell us when you ring. Bundling them into one visit saves a call-out charge and the partner can bring all the parts.
Written Quote Before Work
The partner quotes in writing before work, naming parts and labour, and invoices you directly. We take no payment, and the partner's name is texted to you before they arrive.
One Number if Something Is Off
If a tap still drips or a cistern still runs, ring 07897 016796 and we chase the partner. Our terms page explains where responsibility sits.
Small Faults You Can Try Before You Book
Some toilet and tap problems have simple home answers, and it is worth knowing which, even if a plumber is still needed for the rest.
- Run-on after flushing: lift the cistern lid and check whether the float arm is catching on the side or has dropped, because bending it back sometimes cures it.
- Slow-filling cistern: close the isolation valve, unscrew the inlet filter if there is one and rinse out the grit that hard water leaves behind.
- Spray from a tap: unscrew the aerator at the spout and soak it in descaler, because limescale clogs the tiny holes first.
- Stiff handle: a ceramic cartridge that has seized with scale will need replacing, but it is worth checking that the grub screw has not worked loose.
Choosing a Replacement Tap or Cistern
Check What You Have
Tap holes, spout reach and the type of supply, whether mains pressure or tank-fed, decide which replacement will fit. Photograph the existing fitting and the pipes under the sink and send the details if you can.
Think About Scale
On a hard supply a tap with a removable aerator and an easily accessible cartridge is far easier to keep working. A plumber who fits good isolating valves at the same time makes the next repair a five-minute job.
Dual Flush, Fill Valves and Water Use
Replacing an old cistern fill valve with a modern one is a low-cost way to stop a toilet wasting water, and a dual-flush mechanism lets you use less per flush. The partner will tell you which fits your cistern and whether the old one is worth saving.
Ask for the Water Fittings Rules to Be Met
The Water Supply (Water Fittings) Regulations 1999 require backflow protection and a working overflow on cisterns, so any new fitting should meet them. Ask the partner to confirm that the replacement does.
For water escaping elsewhere see finding hidden leaks or emergency plumbing cover. The full range is on our services page.
Frequently Asked Questions
Why does my toilet keep running after I flush?
The usual causes are a worn flush valve seal that lets water leak into the pan, a float valve that is stuck or set too high so water keeps entering the cistern and escapes through the overflow, or scale on the valve seat. Hard water, such as Mitcham's at 262 mg/l, makes scale more likely. A plumber replaces the faulty valve or seal, and the repair is usually short.
How much does it cost to repair or replace a tap?
Published 2026 UK guides show plumbers charging about £80 to £200 to replace a tap, with a basin tap at around £100 to £180, a kitchen mixer at £130 to £220 and a bath tap at £150 to £250. A repair such as a new washer or cartridge is cheaper. The partner company's written quote, given before work, is the figure that counts.
Why does my tap drip?
A drip usually means a worn washer in a traditional tap or a worn ceramic cartridge in a modern one, though scale on the seat can also stop the tap closing fully. A drip adds up: it wastes water and, if you are on a meter, money. The plumber isolates the tap, replaces the washer or cartridge and tests it. If the tap body is corroded, they will recommend replacing it.
My taps have weak flow. Is it the supply or the tap?
Check whether every tap is weak or only one. A single weak tap usually has a clogged aerator or a scaled cartridge, which descaling or a new part fixes. If every tap is weak, the problem is more likely the stopcock part-closed, a blocked filter, a failing pressure-reducing valve or a supply problem. The partner will test the supply and tell you which it is.
Does hard water damage taps and toilets?
Yes. Limescale from hard water builds up on tap seats, inside cartridges, in aerators, shower heads and on cistern valves, and it makes parts stick, leak or restrict flow. Thames Water's 2024 report gives the Mitcham supply as 262 mg/l, which is classed as hard. Regular descaling and replacing worn parts at the first sign of trouble extends life, and a water softener is an option for the whole house.
Can you fit a new tap or toilet?
Yes, replacing a tap and fitting a new cistern or toilet are routine jobs for the partner plumbers we coordinate. Tell us the type of tap or toilet and whether you supply it. The Water Supply (Water Fittings) Regulations 1999 apply, so backflow protection and overflows must be correct. The partner quotes in writing for parts, labour and removing the old fitting.
My isolation valve will not turn. What now?
Old isolating valves under sinks and behind toilets seize with scale and age, and forcing them can break them and cause a leak. A plumber can free them or replace them with new service valves. Where there is no isolation valve at all, they may need to turn off the water at the stopcock for the repair and fit a valve to make the next one easier.
Is a leaking toilet an emergency?
A slowly leaking base or a trickle can usually wait for a booked visit, but a cistern that is overflowing, a pan that is blocked or a leak that is soaking a ceiling below should be treated as urgent. Turn off the isolating valve behind the toilet if it works, and ring us. Our emergency plumbing page explains the first steps.
Do you repair showers and mixers too?
The partner companies cover mixer taps and many shower valves, cartridges and fittings, though large shower installations are a different job. Tell us what the fault is and what make and type it is, and we will match the right partner. A cartridge replacement is often enough on a mixer that has gone stiff or leaks at the handle.
Who does the work, and who do I pay?
An independently owned partner company does the repair, quotes in writing before work and invoices you directly. We take no payment and send no invoices, and we text you the partner's name before they arrive. If the problem returns, ring 07897 016796 and we chase it. See how the network works for the full explanation.
Drips and Running Cisterns Fixed Properly
Call 07897 016796 and we will arrange a partner plumber for Mitcham, Colliers Wood, Tooting and Morden.
07897 016796