Signs you have a hidden leak
Most leaks announce themselves dramatically — water gushing, pipes spraying. But the expensive ones are quieter. They run for weeks, sometimes months, before you notice. By then they've damaged structure, soaked insulation, and grown mould.
Anglian Water bill 30%+ higher than usual? You probably have a leak somewhere.
Especially patches that grow over days. Often appear yellow or brown before going green/black with mould.
Quiet hissing or trickling at night. Your pipework is leaking somewhere it shouldn't be.
If you have to top up the boiler every few weeks, there's a leak somewhere on the central heating circuit.
If a hot water pipe is leaking under floorboards or screed, you can sometimes feel it walking around in socks.
Persistent damp smell, especially in cupboards, basements, or under sinks. Often the only sign of a slow leak in framing.
Slow leaks at tap connections cause limestone build-up, white salts, or peeling paint nearby.
Quick test: turn off all taps and appliances. If your water meter dial keeps moving — you're losing water.
How leak detection actually works (no smashing required)
The old way: notice damp patch on ceiling, hire builder to smash through plasterboard, find leak, repair, replaster. Cost: £200 in plumbing, £600 in damage and rebuilding.
The modern way:
Isolate sections of pipework, pressurise with water or air, see which sections lose pressure. This narrows down "leak is in mains incoming pipe" to "leak is in 4-metre run between kitchen and bathroom."
Hot water leaks show as warm patches on cool surfaces (or vice versa for cold leaks evaporating). The camera shows exactly where, often within 10cm accuracy. Works through plaster, screed, and most floor finishes.
For pressurised pipes, the sound of escaping water is distinct. Sensitive ground microphones and stethoscope-style listeners trace the loudest point — usually within a few centimetres of the actual leak.
For underground or particularly tricky leaks, non-toxic dye in the system shows where water is reaching. Or hydrogen-nitrogen tracer gas, sniffed out at the surface above the leak.
Once we know the leak is in (for example) "the joint at the back of the kitchen sink, behind the cabinet," we cut a 30cm × 30cm panel — not destroy half the kitchen. Most leaks are accessed through a hole the size of a small picture.
Common hidden leak locations in Bedford homes
- Behind kitchen units — joints in dishwasher/washing machine supply, pinhole leaks in copper, push-fit fittings that have crept loose
- Under bathroom floors — toilet supply pipe, shower waste, bath waste seal failure
- In wall cavities — old pipework runs that pre-date modern plumbing, especially in Bedford properties from 1900s-1960s with original lead/galvanised pipes
- In screed flooring — common in 1960s-1980s Bedford houses with concrete ground floors and pipes buried in screed. Almost always require re-routing rather than repairing
- Loft tank overflow — float valve fails, tank slowly overfills, ceiling beneath gets damp
- Boiler internal leaks — heat exchanger, expansion vessel, pump seal — show as pressure loss
- Mains incoming pipe (between street and house) — old lead supply pipes, or pipes laid too shallow that have been damaged by tree roots or ground movement
The "I think I have a leak" checklist
Before you call, you can do a quick test that helps George diagnose faster:
- Turn off every tap and water-using appliance in the house
- Turn off the boiler and dishwasher/washing machine cycles
- Find your water meter (usually outside, in a pavement box, or in your front garden)
- Note the reading exactly
- Wait 30-60 minutes (don't use any water during this)
- Check the meter again
If the reading has changed at all — you have a leak. Tell George the volume change (e.g. "0.5 cubic metres in 30 minutes") — this gives him a sense of leak size before he even arrives.
Pricing for leak detection
- Standard callout (Mon-Fri 8am-6pm): £60
- Emergency callout (24/7): £80
- Full leak detection (thermal imaging + acoustic + pressure test): £150-280 depending on house size
- Insurance report (detailed PDF for claim): +£60 (often reimbursed by insurer)
- Repair after detection: separate, depending on what's found — typically £100-400
If you have home insurance, leak detection is often covered under "trace and access" cover. Save the receipts and submit to your insurer — many policies pay back the detection cost in full.
Leak detection across Bedfordshire
Bedford · Kempston · Biggleswade · Sandy · Flitwick · Ampthill · Bromham · Sharnbrook · Milton Keynes · St Neots