Fixington

Clear blockage in drain (including the u-bend or plughole)

Trade: Plumber

⭐ Introduction

A blocked drain, plughole, or u-bend is a common household nuisance that can cause slow drainage, unpleasant smells, or even water backing up onto floors. This job involves clearing the blockage so your water flows freely again. Whether it’s the kitchen sink struggling to drain, the bathroom basin or shower gully clogging up, or the downstairs toilet flushing slowly, knowing when to call a plumber can save time and prevent potential damage.

Blockages typically happen from a build-up of grease, hair, soap scum, food waste, or foreign objects. Early attention is important because leaving a blockage unattended can lead to leaks or more serious plumbing problems. In the UK, it’s sensible to ensure the work complies with general plumbing standards, although clearing a drain rarely requires formal certification.

🔧 What the job involves

Clearing a blockage means removing whatever is causing water to stop running smoothly. For domestic drains, this often focuses on the u-bend or trap beneath sinks, baths, or basins, or the plughole itself.

Here’s what a plumber usually does:

  • Inspection: First, the plumber assesses the problem—checking the drain’s flow and sometimes using basic tools like a torch or mirror to locate the blockage.
  • Access: They’ll remove the u-bend (a curved pipe section under the sink designed to trap debris and prevent sewer gases entering your home) or open the plughole.
  • Clearing the blockage: This may involve manually removing waste or using specialised tools:
    • A drain snake or auger, a flexible metal rod, to physically push through or hook out blockages.
    • A drain jetting hose that uses high-pressure water if the blockage is deeper in the pipe.
    • Sometimes chemical drains cleaners might be considered, but only those approved for use in domestic plumbing and safe for the environment.
  • Testing: Once cleared, the plumber runs water through the system to ensure it flows as it should.
  • Reassembling: The u-bend or plughole is put back together securely, checking for leaks.

If the blockage is caused by damaged pipes or more serious issues, the plumber will advise on repairs.

📝 Step-by-step from booking to completion

  1. Initial enquiry
    Contact your plumber via phone or online, describing the problem briefly (e.g., “Kitchen sink draining very slowly”).

  2. Survey and quote
    The plumber may visit to inspect the issue or give a provisional quote based on the description. If a visit is required, they’ll schedule a convenient time.

  3. Booking the job
    Once you agree on the price and time, the plumber confirms the appointment.

  4. Arrival and diagnosis
    The plumber arrives on the day, inspects the drain, and explains the cause of blockage and plan.

  5. Clearing the blockage
    Work begins using appropriate tools; this may involve removing u-bends or using a drain snake.

  6. Testing
    Plumber checks water flow and ensures everything is leak-free.

  7. Clean-up and advice
    Area tidied; plumber may offer tips on preventing future blockages.

  8. Payment and paperwork
    You settle the invoice; any guarantee or service paperwork is provided.

💷 Main costs to expect

Typical price components when hiring a plumber to clear a blocked drain or u-bend include:

  • Labour
    Usually charged hourly or as a fixed call-out fee plus labour.
    Example: £60–£100 per hour.

  • Materials and parts
    Replacement u-bends, washers, or seals if required.
    Example: £10–£25.

  • Extras
    Equipment hire for specialised clearing tools like drain snakes or jetting machines (sometimes included).
    Example: £20–£50.

  • Disposal
    Minor disposal of debris is usually included; large amounts may add to cost.

  • Certifications
    Clearing a drain trap isn’t regulated under Building Regulations or Part P, so certification is typically not needed unless related work demands it.

📊 What affects the price

A range of factors influences the overall cost of clearing a drain blockage:

  • Access difficulty
    Tight or awkward plumbing spaces take longer to work in.

  • Blockage complexity
    Simple hair or grease plugs are quicker than intrusive roots or solid obstructions.

  • Length and depth of blockage
    Surface blockages under the sink are easier than ones further down the waste pipe.

  • Additional repairs
    Damaged pipes or corroded fittings needing replacement.

  • Location of property
    Prices may vary between London and other UK regions.

  • Urgency and timing
    Emergency call-outs or weekend jobs often cost more.

⏱ How long does it take?

The time needed depends on the blockage type and where it is located:

  • Simple clearing of a u-bend or plughole:
    Usually 30 minutes to 1 hour.

  • Deeper drain clearing with manual tools:
    Up to 2 hours.

  • Drain jetting or complicated blockages:
    2 to 4 hours or sometimes longer if multiple pipe sections need clearing.

If your plumber detects underlying pipe damage, additional time for repair will be necessary.

🏠 Can you DIY it?

DIY is possible for minor blockages in the u-bend or plughole using these steps:

  • Remove and clear the u-bend trap (have a bucket beneath to catch water).
  • Use a drain snake or a simple manual auger for minor clogs.
  • Avoid harsh chemical drain cleaners as they can damage pipes and harm the environment.

However, it’s advisable to hire a professional if:

  • Blockage persists after DIY attempts.
  • You lack basic plumbing tools or confidence.
  • The blockage is in deeper pipes, drains, or outside the home.
  • You detect leaks, corrosion, or foul smells needing professional assessment.

💰 Typical UK price range

As a rough guide, the cost to clear a blockage in the u-bend or plughole usually falls between:

£80 to £180 (including VAT at 20%)

This is an estimate covering labour, small parts, and basic clearing tools. Prices may rise for complex jobs or urgent call-outs.

✅ Handy tips before you start

  • Prepare the area by clearing under-sink cupboards for easy access.
  • Have old towels or cloths handy to catch drips.
  • Keep a bucket ready when dismantling the u-bend.
  • After clearance, run hot water for several minutes to help prevent re-blockage.
  • Ask the plumber about any guarantees or aftercare services.
  • Keep an invoice and any paperwork safe for future reference.
  • Consider routine maintenance, such as regular checks or moderate drain jetting, if blockages recur.

If you’re encountering slow drainage or suspect a blocked u-bend or plughole, a prompt call to a trusted plumber can help save time, inconvenience, and potential water damage. With straightforward pricing and clear communication, you can get your water flowing smoothly again.