Fixington

Dual Flush Toilet

Trade: Plumber

⭐ Introduction

A dual flush toilet is a bathroom fitting designed to save water by offering two flush options: a smaller flush for liquid waste and a larger flush for solid waste. It’s becoming the standard choice across UK homes due to its environmental benefits and potential to reduce water bills.

You might consider installing or upgrading to a dual flush toilet:

  • If your existing toilet is an older single flush model.
  • When renovating or refitting your bathroom.
  • To improve your home’s water efficiency and sustainability.
  • Because the flush mechanism is faulty or parts need replacing.

Replacing or fitting a dual flush toilet is a common plumbing task that combines functional improvement with water conservation benefits.

🔧 What the job involves

Installing a dual flush toilet typically includes:

  • Removing the old toilet (if replacing).
  • Inspecting or installing the waste pipe and floor mounting.
  • Fitting the new toilet pan and cistern.
  • Connecting the dual flush mechanism to the cistern.
  • Ensuring fittings are sealed to prevent leaks.
  • Testing the flush system works correctly, with both flush options functioning.
  • Checking the water supply connection and making necessary adjustments.
  • Tidying up and disposing of any old parts.

If this is a completely new installation, additional work might include laying new plumbing connections or adjusting the soil pipe, which can add complexity.

📝 Step-by-step from booking to completion

  1. Enquiry: Reach out to a qualified plumber, providing details about your current toilet and whether it’s a replacement or new installation.

  2. Site survey & quote: The plumber inspects your bathroom setup and provides a written estimate outlining labour, materials, and any potential extras.

  3. Booking a date: Agree on a convenient day for the work. The plumber will confirm the timeline and check access requirements.

  4. Day of works: The plumber arrives, removes the old toilet if applicable, installs the new dual flush toilet, connects all plumbing, and thoroughly tests the installation.

  5. Final checks & customer walkthrough: The plumber demonstrates how to use the dual flush system, checks everything is sealed and secure, and cleans up the work area.

  6. Completion paperwork: You receive any relevant guarantees or manufacturer warranty info, along with advice on servicing.

  7. Aftercare: Keep all paperwork safe and follow recommendations for routine maintenance.

💷 Main costs to expect

  • Labour: Around £100–£200 depending on complexity and plumber rates.
  • Toilet & cistern: £100–£300+ depending on style and brand.
  • New flush mechanism (if just replacing parts): £20–£60.
  • Waste disposal: Some tradespeople include this; if not, a small fee of £10–£30 may apply.
  • Additional plumbing parts: Hoses, seals, mounting bolts typically £10–£30.
  • Certification/documentation: Not usually required for toilets unless part of major plumbing works but check with your plumber.

For example:

Item Typical cost (£)
Labour (2–3 hours) 120
Dual flush toilet set 150
Misc. fittings & seals 25
Waste disposal 20
Total (estimate) ~315

📊 What affects the price

  • Access: Tight spaces or awkward bathroom layouts slow work.
  • Complexity: New pipework or soil stack modifications add cost.
  • Type of toilet: Wall-hung or complex close-coupled models cost more.
  • Regulations: Most toilet installations do not require formal certification but if linked to structural works or drainage upgrades, costs may rise.
  • Remedial works: Repairing floors or existing plumbing problems.
  • Location: Tradespeople in London or the South East may charge more.
  • Urgency: Emergency or short-notice jobs usually cost more.

⏱ How long does it take?

  • Simple replacement: 2–3 hours in most cases.
  • New installation with minor plumbing: Half day (4 hours).
  • Complex plumbing or wall-hung models: Possibly a full day or longer.

The time includes removal, fitting, testing, and tidying.

🏠 Can you DIY it?

While removing and installing toilets is sometimes manageable for experienced DIYers with the correct tools, bear in mind:

  • Ensuring a watertight seal on the waste connection is crucial to avoid leaks and foul smells.
  • Adjusting water supply pipes requires care to prevent drips or bursts.
  • Working with soil pipes (the waste pipe from the toilet) may require knowledge of Building Regulations.
  • If unsure, hiring a Gas Safe or Part P-registered plumber (for other bathroom works) ensures the installation is safe and compliant.
  • Incorrect installation can cause expensive damage or hygiene issues.

For most homeowners, engaging a plumber is the safest and most reliable choice.

💰 Typical UK price range

The average cost to replace or install a dual flush toilet is roughly £250 to £500 including labour and materials, plus VAT if applicable.

  • Simple replacements can start from around £200.
  • More complex installations or high-end toilets can exceed £600.

These figures are estimates and vary regionally. Always get a detailed quote in advance.

✅ Handy tips before you start

  • Clear the bathroom area: Ensure easy access and removal of the old toilet.
  • Check water shut-off: Know where the stopcock is to isolate water during work.
  • Ask about warranties: Confirm guarantees on both labour and parts.
  • Keep paperwork: Store receipts, manuals, and service documents safely.
  • Regular maintenance: Cleaning and occasional servicing can prolong flush mechanisms.
  • Consider water efficiency: Dual flush toilets can save around 3,000 litres per person annually compared to traditional models.

By preparing well and understanding the process, your dual flush toilet installation can be straightforward and hassle-free.