5 Common Plumber Problems and When to Call a Professional
Some problems are safe to investigate yourself; others get more expensive the longer they're left, or more dangerous the more you touch them. Here's how to tell the difference with the issues plumbers see most often.
The problems that come up most
These are the jobs plumbers are most commonly booked for. Catching them early almost always costs less:
- a boiler losing pressure repeatedly
- water hammer banging in the pipes
- a slow leak staining a ceiling below a bathroom
- radiators cold at the top or bottom
- a toilet that keeps running after flushing
What you can safely check yourself
Before calling anyone, gather information: when the problem started, whether it's getting worse, and clear photos. This helps a professional give you a realistic first assessment and helps you describe the job accurately when collecting quotes.
Basic observation is always safe; DIY repair is not always. If the problem involves gas, electrics, working at height or the structure of your home, stop at observation and call a professional.
Signs it's time to book someone
Book a professional when the problem is getting worse, when it involves safety, when your own attempts haven't held, or when you simply don't know the cause. A correct diagnosis is usually cheaper than a wrong repair.
For context on cost: Plumbers commonly charge £40–£80 per hour, or £180–£350 for a day. Emergency call-outs often carry a £80–£150 minimum charge before work starts.
Choosing who to call
Plumbing itself is not licensed, but WaterSafe-approved contractors are vetted for water regulations compliance. If the job touches gas, only a Gas Safe registered engineer may legally do it.
Check recent reviews before booking — Hammerscore company pages for plumbers combine ratings from several platforms, and the low-star reviews tell you most about how problems were handled.
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