A guide to bathroom repairs.

Maintaining your bathroom fixtures not only prevents costly secondary damage but also ensures your home remains water-efficient. Whether it is a faulty flush mechanism or a degraded silicone seal, timely intervention by a qualified plumber is essential for a functional, mould-free home.

What Does the Work Involve?

• Diagnostic Inspection: Identifying the root cause of leaks, low pressure, or drainage issues through visual checks and pressure testing.
• Water Isolation: Turning off the local isolation valves or the main stopcock to ensure a safe, dry working environment.
• Component Replacement: Removing faulty parts such as ceramic discs, washers, syphon units, or thermostatic mixing valves.
• Surface Preparation: Stripping away old, mouldy sealant or grout before applying fresh, anti-fungal materials to ensure a watertight finish.
• System Testing: Re-pressurising the system and monitoring for leaks under full flow to confirm the repair is successful.

Typical Costs

Prices are influenced by your location in the UK, the urgency of the call-out, and the specific brand of fixtures used. Always clarify if the quote includes VAT and the cost of replacement parts before work begins.

How Long Does It Take?

• Minor Tap or Valve Repairs: 1–2 hours.
• Toilet Syphon or Ball Valve Replacement: 1–3 hours.
• Bath or Shower Re-sealing: 2–4 hours (plus 24 hours curing time before use).
• Locating and Fixing Hidden Leaks: 3–6 hours, depending on accessibility.
• Electric Shower Replacement: 2–4 hours, assuming existing wiring and plumbing are compatible.

DIY or Professional?

Basic tasks like changing a showerhead or replacing a tap washer are well within the reach of a confident DIYer. However, any work involving the main pipework, hidden leaks, or electrical components should be handled by a professional to ensure the integrity of your home's plumbing.

Never attempt to repair an electric shower yourself. Water and electricity are a lethal combination; always hire a Part P qualified professional for these units.

Choosing the Right Tradesperson

• Check Qualifications: Look for plumbers registered with WaterSafe or the CIPHE (Chartered Institute of Plumbing and Heating Engineering).
• Insurance: Ensure they hold valid public liability insurance (minimum £1 million) to cover any accidental water damage.
• Red Flags: Be wary of tradespeople who demand full payment upfront or are unable to provide a written estimate.
• Ask These Questions:
  • Are your repairs guaranteed, and for how long?
  • Does the quote include the disposal of old fixtures?
  • Will you be using genuine manufacturer parts or "compatible" alternatives?

UK Regulations

• Water Supply (Water Fittings) Regulations 1999: Ensures all plumbing work prevents contamination and waste of the public water supply.
• Building Regulations Part P: Mandatory for any electrical work in "wet zones," such as installing or repairing electric showers.
• Building Regulations Part F: Covers ventilation requirements, essential if you are replacing or repairing extractor fans to prevent mould.

Common Problems

• Degraded Silicone: Over time, sealant shrinks and cracks, leading to "invisible" leaks that rot floorboards behind the bath.
• Limescale Build-up: In hard water areas (common in the South and East of England), scale can seize valves and reduce shower pressure.
• Incorrect Grout: Using non-waterproof grout in shower enclosures leads to water ingress and tiles falling off the wall.
• Over-tightened Fittings: A common DIY error that can crack ceramic basins or split rubber washers, causing immediate leaks.

Frequently Asked Questions