Boiler 31 March 2023

DIY vs Professional Gas Boiler Installation: Which is Better?

If you are handy around the house, it is a fair question to ask whether fitting your own boiler is an option. We will save you the suspense: it is not. Gas work is one of the very few jobs where the law takes the decision out of your hands entirely. Here is what that means in practice, what you genuinely can do yourself, and what you are actually paying for when you bring in an engineer.

DIY Gas Boiler Installation Is Not Legal

This is not a matter of skill or confidence. Under the Gas Safety (Installation and Use) Regulations, work on gas appliances, pipework and flues may only be carried out by a Gas Safe registered engineer. That covers fitting a boiler, moving one, and altering the gas supply to it. Doing it yourself is a criminal offence carrying an unlimited fine, whatever your trade background.

The consequences do not stop at the law:

• Safety. A badly fitted flue or an unchecked gas rate can put products of combustion, carbon monoxide among them, into the house. This is the reason the regulations exist.
• Your insurance. Home insurers can decline a claim arising from unregistered gas work. If a DIY installation causes a fire or a flood, you may find you are carrying the cost alone.
• Your warranty. Manufacturers require installation and registration by an approved engineer. Fit it yourself and there is no warranty to fall back on.
• Selling the house. A boiler with no Building Regulations compliance certificate becomes a conveyancing problem years later, when you have long forgotten about it.

What You Genuinely Can Do Yourself

Plenty, and we would rather you knew it than paid us for jobs you do not need us for:

• Bleeding radiators and topping up system pressure
• Resetting a boiler that has locked out
• Fitting or programming a wireless room thermostat
• Changing thermostatic radiator valve heads
• Lagging pipework and insulating a cylinder

None of that is gas work. The line falls at the appliance itself, its flue, and the gas pipe feeding it.

Professional Gas Boiler Installation

Pros:

• Safety: A professional installer has the knowledge, training and equipment to ensure the installation is safe and meets legal requirements.
• Warranty: Professional installation ensures the manufacturer’s warranty is valid, giving you peace of mind.
• Expertise: Professional installers have experience and expertise that DIY enthusiasts may lack.

Cons:

• Cost: Hiring a professional installer can be more expensive than doing it yourself.
• Scheduling: You may have to schedule the installation around the installer’s availability.
• Less control: You may not have as much control over the project as you would if you were doing it yourself.

So What Are You Actually Paying For?

Not just the hours on site. A proper installation includes sizing the boiler to the heat loss of your property rather than guessing, checking the gas supply can deliver what the new unit needs, working out where the flue can legally terminate, cleaning the system so the new heat exchanger is not immediately ruined by old sludge, and pressure-testing every joint before anything is boxed back in.

It also includes the paperwork that matters later: registering the boiler with the manufacturer so the warranty is live, and notifying Building Control through Gas Safe so the compliance certificate exists when a buyer’s solicitor asks for it.

How to Check the Engineer You Hire

Anyone can say they are Gas Safe registered. Ask for the number and check it at gassaferegister.co.uk — it takes a minute, and the register also shows which types of work that engineer is qualified for. Ours is 951167.

Talk to Us

At Plumbing Angels we are Gas Safe registered and cover Tonbridge, Tunbridge Wells and the surrounding Kent villages. Boiler installations are quoted free of charge, in writing, at a fixed price, once we have seen the property — we do not price gas work over the phone. Materials are agreed with you before we fit or order anything, and our workmanship carries a 12-month guarantee on installations (90 days on repairs) alongside the manufacturer’s warranty on the boiler.

Call 01732 792 454 or request a callback.