Fixington

Connect a gas appliance to existing gas supply

Trade: Heating Engineer

⭐ Introduction

Connecting a gas appliance to an existing gas supply is a common job for homeowners who are installing a new cooker, boiler, fireplace, or gas fire. Whether you’re replacing an old appliance or fitting an additional one, the connection needs to be safe, secure, and compliant with UK gas safety regulations.

This task is essential because gas is potentially dangerous if not handled correctly. A professional heating engineer will ensure your appliance is fitted properly to avoid leaks, carbon monoxide risks, or faulty operation.

You’ll usually need this service when moving into a new home, upgrading your gas appliance, or adding another device that uses natural gas or LPG (liquefied petroleum gas).

🔧 What the job involves

When a qualified heating engineer connects a gas appliance to your existing supply, they will:

  • Check the condition and pressure of the existing gas pipework.
  • Fit the appliance’s gas connection pipe or flexible hose, ensuring secure joints and using the correct fittings.
  • Install any necessary isolation valves or connectors needed to meet safety standards.
  • Perform airtightness and pressure tests on the connections to ensure no leaks.
  • Ensure the appliance is correctly positioned and properly vented (if applicable).
  • Light the appliance and check it burns safely and efficiently, often with a gas analyser.
  • Provide a Gas Safety Record (CP12 certificate) after installation.
  • Give advice on safe use and maintenance.

All work must be done by a Gas Safe registered engineer to comply with UK law and insurance requirements.

📝 Step-by-step from booking to completion

  1. Initial enquiry: Contact a local Gas Safe registered heating engineer or company. Explain the appliance type and its location.
  2. Site survey or phone consultation: The engineer may want to visit or ask questions to check your existing gas supply and access.
  3. Getting a quote: You’ll receive a cost estimate covering labour, parts, and any additional work required.
  4. Scheduling the work: Agree a convenient date and time for the engineer to come.
  5. Day of installation:
    • The engineer arrives with necessary equipment and parts.
    • They isolate the gas supply before starting work.
    • Connect the new appliance, install fittings, and carry out safety tests.
    • Turn the gas back on and ignite the appliance to check operation.
  6. Completion paperwork: You will receive a Gas Safety Record for the new installation.
  7. Advice and aftercare: The engineer may suggest ongoing servicing or checks to keep your appliance safe.

💷 Main costs to expect

  • Labour: Typically charged by the hour, around £50–£70 per hour including VAT. Most connections take 1–3 hours.
  • Materials/parts:
    • Flexible gas hose or copper pipe.
    • Isolation valves and connectors.
    • Pipe clips and fittings.
  • Testing equipment use: The engineer’s gas analyser and leak detection.
  • Disposal: If removing old pipework or appliances, there might be a small disposal fee.
  • Certification: The Gas Safety Record is usually included in the labour cost.

Example:

  • Labour (2 hours): £120
  • Parts (hose, fittings, valve): £40
  • Certification: included
    Total estimate: £160

📊 What affects the price

  • Accessibility: Hard-to-reach or awkward locations take longer.
  • Complexity: Additional pipework, longer runs, or modifications increase cost.
  • Regulations and certification: Compliance with Building Regulations and Gas Safe standards.
  • Remedial works: If old pipework is faulty or unsafe, repairs add extra time and cost.
  • Location: Tradespeople in London and the South East often charge higher rates.
  • Timeline: Emergency or short-notice work usually attracts a premium.

⏱ How long does it take?

  • Simple connection (e.g., replacing a cooker with an existing gas point nearby): 1–2 hours.
  • Standard boiler or fireplace connection: 2–3 hours.
  • Installation needing additional pipework or valve replacement: 3–5 hours.
  • Should any remedial work be needed, it could take longer.

🏠 Can you DIY it?

No. Gas work, including connecting appliances to gas supplies, must be carried out by a Gas Safe registered engineer. UK law forbids anyone not qualified and registered from working on gas appliances or pipework.

Attempting to DIY gas connections is unsafe and illegal. It can cause deadly gas leaks, carbon monoxide poisoning, or explosions. It will also invalidate home insurance and breach Building Regulations.

Always hire a professional with a valid Gas Safe ID card for any gas-related work.

💰 Typical UK price range

As a rough guide, connecting a gas appliance to an existing supply usually costs between £120 and £300 including VAT.

This estimate covers common scenarios and assumes straightforward access and no major pipework changes. More complicated jobs can exceed this range.

✅ Handy tips before you start

  • Check your chosen engineer is Gas Safe registered. You can verify this on the Gas Safe Register website.
  • Prepare a safe, accessible space around where the appliance will go.
  • Make sure the gas supply can be easily isolated during installation.
  • Keep all paperwork, including the Gas Safety Record certificate, for future reference and warranty.
  • Arrange regular servicing of your gas appliances, usually annually, to maintain safety and efficiency.
  • If you’re replacing an old appliance, ask the engineer about correct disposal options.
  • Understand any manufacturer guidance for your appliance regarding installation and commissioning.

Following these steps will help ensure your gas appliance installation is safe, efficient, and legally compliant.