What to Expect During a Boiler Installation

A boiler installation is a significant home upgrade that improves heating performance, energy efficiency, and comfort. Whether you're based in Bolton, Wigan or Warrington, understanding each stage of the process can help you feel more prepared and confident about your decision.

What happens during a boiler installation?

Step 1: Initial Survey and Quotation

Before the installation day, a qualified heating engineer will carry out a home survey. This allows us to assess your current system, discuss your heating and hot water needs, and recommend the most suitable boiler model. For homeowners in Bolton or Wigan upgrading from an older boiler, this is a great opportunity to explore energy-efficient options that could lower your energy bills.

We’ll also check water pressure, boiler flue positioning, and access to pipework. Once we’ve gathered the necessary details, you’ll receive a full quote covering labour, parts, and any additional upgrades or accessories.

Step 2: Removal of the Old Boiler

On the day of installation, the first step is to isolate the gas and water supply and begin safely removing the old boiler. This includes disconnecting any outdated pipework, draining the system, and preparing the area for the new unit. For properties in Warrington with older gravity-fed systems, this may involve removing old tanks or converting to a modern combi boiler.

Step 3: Installing the New Boiler

Once the area is prepped, the new boiler is fitted in place. This includes:

• Connecting the boiler to the gas, water, and electrical supplies
• Installing a new flue system through the wall or roof
• Upgrading pipework or relocating the boiler if required
• Fitting new controls or thermostats

Installation times vary, but most boiler installations in Bolton or Wigan are completed within one working day. More complex projects or full heating system overhauls may take slightly longer.

Step 4: Powerflush and System Testing

To protect your new boiler, we often recommend a system powerflush to remove sludge and debris from your radiators and pipework. This helps ensure your heating system runs efficiently and extends the life of the new boiler. Once everything is connected, we perform a full system test to check pressure levels, thermostat function, radiator heat distribution, and gas safety.

Step 5: Handover and Registration

We’ll walk you through your new boiler, explain how the controls work, and answer any questions. Then we’ll register the installation with the manufacturer to activate your warranty. We also notify Gas Safe, so your installation is compliant and properly certified.

Once the job is complete, we offer tailored boiler service plans to help keep your system in top condition. Whether you need regular boiler servicing in Warrington, a repair in Wigan, or annual maintenance in Bolton, our team is here to help.

Book a boiler installation

If you’re looking for trusted boiler installers in Bolton, reliable boiler installation in Warrington, or a new boiler installation in Wigan, Twinsun Heating & Plumbing are ready to help. Get in touch by calling us on 03330411007 and we'll be happy to help.