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At City Plumbing, we pride ourselves on being a leading provider of boilers for UK homeowners and tradespeople. Choose between domestic and commercial models from a variety of trusted brands. 

Boilers: FAQs 

When do I need a new boiler?

Knowing when to replace your boiler could save you money on repairs and energy bills. Plus, installing a new boiler to your household means instantly enjoying the efficiency benefits of modern appliances. 
Generally, leading manufacturers recommend replacing a boiler after around 10 to 15 years. Your boiler could last much longer if it's carefully used and properly maintained. However, if you've got a known fault with your boiler that keeps returning, it could be time for a new one.

Which boiler for sale is best for me?

Choosing the right boiler means picking a brand and model. Space is a key factor, so measure your existing boiler (or where it will go if it's moving) so you can find the right fit.
You should think about your budget first and foremost, planning according to your needs and average usage. You'll also need to weigh up the pros and cons of choosing combi, gas or electric boilers. If you're shopping for large business premises, a commercial boiler may be the most suitable option.
Our online selection includes top-spec boilers from Ideal, Vaillant, Worcester Bosch and many more leading household names. Browse the selection online and read customer reviews to choose the most suitable boiler.

How can I change the temperature of my boiler?

Your boiler's flow temperature determines how hot the water it sends to your radiators is. You can usually adjust this on the boiler's control panel, often using buttons or a dial labelled with a radiator symbol. Check your boiler's manual for specific instructions, as models vary.
Lowering your boiler's flow temperature by a few degrees can help you save money on your heating bills. Be careful not to set it too low, however, as this can reduce the efficiency of your heating system, leaving your home feeling cold and potentially increasing the risk of condensation and damp.

Which new boilers are the most energy-efficient?

For households with radiators or underfloor heating systems, combi boilers typically offer the highest levels of energy efficiency. A few of our recommended new boilers for sale include:

How efficient is my boiler?

Check your boiler's energy label to find out how efficient it is. This will give it a rating between A and G, along with any information on the noise emitted by the boiler. The most efficient boilers will be rated A or higher.
If you're planning to sell your home soon, choosing an energy-efficient boiler could even upgrade your EPC.

Is my boiler safe?

Whether you've just bought a new gas boiler or you've been running an electric model for years, safety is paramount. Getting your boiler serviced regularly is the best way to make sure that everything's in good working order.
In the meantime, there are a few things to look out for. The following high-priority signs could indicate that something's not quite right with your boiler:
  • Leaking: If your boiler is dripping water, a part has likely failed somewhere inside it. Don't try and fix it on your own. Switch off the boiler and call a Gas Safe engineer to come and investigate the issue for you.
  • Noise: If your boiler is making loud noises like gurgles, whistles and bangs, there could be a problem. It's likely to be caused by debris or air building up inside the unit, but it's worth asking an engineer to check.
  • No hot water: If your boiler isn't sending hot water to your taps or radiators, there could be several causes. If topping up the pressure doesn't fix it and you've checked for thermostat issues, call an engineer. 

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