Buying a new boiler is one of the biggest decisions a homeowner can make — but what many people don’t realise is that you don’t have to buy it through an installer.

More and more homeowners and local trades are choosing the supply-only option, giving them full control over the brand, the price, and who fits it.

If you’re looking for a boiler without installation included, this guide from Prescot Plumbing & Heating will help you make the right choice for your home.

As a trusted, long-established supplier serving Prescot, St Helens, Knowsley, Huyton, Liverpool and the wider Merseyside community, we provide boilers direct to both trade and public customers — with no installation costs attached.

Here’s what you need to know before choosing the right supply-only boiler.

🔧 1. Identify the Type of Boiler You Already Have

Before you buy a boiler on a supply-only basis, you need to match it to the correct type — unless your installer has confirmed that an upgrade is possible.

The three main types are:

✓ Combi Boiler (Most Common in the UK)

• Ideal for smaller homes and flats
• Instant hot water
• No tanks required
• Compact and efficient

✓ System Boiler

• Works with a hot water cylinder
• Great for homes with multiple bathrooms
• Suitable for medium-sized and larger properties

✓ Regular/Conventional Boiler

• Older style system with both a hot water cylinder and tanks
• Common in traditional UK homes
• Still preferred in properties with low water pressure

At Prescot Plumbing & Heating, we stock all three boiler types and can help you confirm which model is compatible with your home or your customer’s system.

🔥 2. Choose the Correct Boiler Size (kW Output)

Boiler output determines how much heating and hot water your home can produce. Choosing the wrong size is a common mistake.

General UK Guidelines

• 24–27 kW → Flats & small homes
• 28–34 kW → Medium homes with 2–4 people
• 35–42 kW → Larger homes with multiple bathrooms

The team at Prescot Plumbing & Heating can advise you on the best kW rating based on property size, radiators, and hot water demand.

💷 3. Look for Energy Efficiency — It Saves You Money Long-Term

When buying supply-only, you have the freedom to choose a more efficient model without inflated installation-package prices.

Look for:

• A-rated boilers
• Low energy consumption
• Smart-compatible controls
• High efficiency modulating technology

We supply a wide range of A-rated boilers at affordable local prices, helping homeowners reduce energy bills while improving comfort.

🛠 4. Check Warranty Coverage

Even when buying supply-only, you should still receive full manufacturer warranty protection.

Typical UK boiler warranties include:

• 5 years
• 7 years
• 10–12 years (premium models)

We help customers understand what each brand offers so they can choose a boiler that provides long-term reliability.

🧰 5. Consider Local Aftercare, Parts, and Maintenance Products

When choosing a boiler, it’s important to ensure the model has easily available parts and compatible accessories.

At Prescot Plumbing & Heating, we also stock:

• System cleaners
• Magnetic filters
• Inhibitors
• Replacement valves
• Chemical flush products
• Essential boiler fittings

Everything you need for maintenance — all in one place.

🚚 6. Buy From a Local, Trusted Supplier

Choosing a boiler is easier when you can speak to a real, knowledgeable team — not a faceless online retailer.

Prescot Plumbing & Heating proudly serves:

• Homeowners
• Landlords
• Heating engineers
• Local trades
• Property developers

We’re known across Prescot, St Helens, Knowsley, Huyton and Liverpool for providing competitive prices, expert advice, and fast, friendly service — without tying you into installation packages.

🌡 Why Choose Prescot Plumbing & Heating for Supply-Only Boilers?

✔ Wide range of boilers always in stock

✔ Open to both public and trade customers

✔ Competitive supply-only prices

✔ No installation — just honest, transparent advice

✔ Serving Prescot and the wider Merseyside area

✔ Everything you need under one roof: boilers, fittings, chemicals & heating essentials

Whether you’re upgrading your own home or you’re a tradesperson buying for your next job, we help you find the right boiler at the right price.

📞 Need a New Boiler Supply-Only? Visit Prescot Plumbing & Heating Today

Your trusted local supplier for all boiler, plumbing, heating, and bathroom products — proudly serving the Prescot and Merseyside community.