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01 · Ask
Diagnose before you call
Tell the AI what's leaking, dripping or rumbling. It tells you whether you need a plumber, a gas engineer, or a drain specialist — and how urgent it is.
Fit a thermostatic shower.
Bar mixer or concealed valve — TMV2/TMV3 thermostatic protection, fitted by a plumber to your system.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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02 · Read the brief
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Gas Safe vs WaterSafe, boiler warranty conditions, unvented cylinder rules. The plumber brief covers the regs most homeowners learn the hard way.
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Top tips
Hiring a plumber, without the regret.
Four moves that separate a smooth job from a nightmare.
Always ask for the Gas Safe ID.
If gas work is part of the job, the engineer must show their Gas Safe registration card. Verify the number at gassaferegister.co.uk before they touch anything.
Get three written quotes.
Plumbing prices vary wildly by job and area. Three quotes shows you the market — anything more than 20% out from the others is a flag.
Insist on parts receipts.
For boiler parts, valves and cylinders, ask for manufacturer receipts. Genuine parts come with warranty; refurbished kit often doesn't.
Hold final payment until tested.
Pay in stages, not upfront. Hold the last 10–20% until you've run hot taps, flushed the system and seen the certificate.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Hourly call-out rateHigher in London
£40–£90/hr
Tap or mixer replacement
£80–£250
Radiator installationInc. valves + balancing
£200–£600
New combi boiler installed
£1.8k–£4.5k
Full bathroom plumbingExcl. tiles + suite
£1.5k–£6k
Emergency leak call-outOut-of-hours
£120–£350
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
Infographic · VideoThe Plumber briefing.
Infographic
Plumber quick-view
Video guide
Plumber explained
A thermostatic mixer protects against scalding and cold-shock when someone else flushes the loo. Modern installs use a bar mixer (visible) or concealed valve (behind tile) — both with TMV2 or TMV3 standards.
What's involved
- Isolate hot + cold supply, drain
- Fit valve (bar or concealed) with riser rail and head
- Connect to gravity, combi or pumped system as appropriate
- Test temperature stability across mains-pressure changes
Typical UK costs (2026)
| Item | Cost |
|---|---|
| Bar mixer supply + fit | £180–£380 |
| Concealed valve supply + fit (with tile work) | £450–£900 |
| Premium thermostatic mixer + rainfall head | £600–£1,400 |
| Labour only (you supply shower) | £140–£280 |
What to check
Shower system compatibility — combi, gravity-fed and pumped systems need different valve types. Combi typically uses high-pressure thermostatic, gravity uses low-pressure or pumped variants.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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