Combi Boiler Installation
Combi boilers provide instant hot water and heating without a cylinder — ideal for most homes. We supply and fit all major brands.
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Supply and fit new boilers across Caerphilly and the surrounding valleys. Gas Safe registered engineers installing Worcester Bosch, Vaillant, Ideal, and Baxi boilers — with full guarantee.
Reliable, professional service across Caerphilly and the surrounding valleys. Gas Safe registered engineers and experienced tradespeople you can trust.
Combi boilers provide instant hot water and heating without a cylinder — ideal for most homes. We supply and fit all major brands.
Get QuoteSystem boilers work with a hot water cylinder and are ideal for larger homes with multiple bathrooms. Full supply and fit available.
Learn MoreAs accredited Worcester Bosch installers we can offer their extended 10-year parts and labour guarantee — the best in the industry.
View WarrantiesFull strip-out of your old boiler, flue, and associated pipework included. We leave the installation area clean and tidy.
Book TodayWe install and configure Hive, Nest, and Honeywell smart thermostats as part of your new boiler installation package.
Add Smart ControlsEvery installation is registered with Gas Safe and you receive a BS 7593 system flush certificate and building regulations notification.
Get CertifiedThe single most important measurement before installing a boiler in Caerphilly is the incoming mains flow rate, and it is the one most often skipped. Pressure and flow fall with elevation, and properties on the higher ground around the town can have materially less available than a combi boiler needs to run a shower and a tap at once. Fitting a larger combi does not solve it — a boiler cannot heat water it is not being supplied.
Where flow is genuinely limited, the right specification is usually a system boiler with a stored hot water cylinder, which fills at whatever rate the mains allows and then delivers at a useful rate on demand. If an unvented cylinder is used it needs the appropriate qualification to install and annual attention thereafter. We will explain the trade-off rather than defaulting to a combi because it is quicker to fit.
Exposure shapes the rest of the installation. Condensate pipework needs to be run internally where possible, and where it must go outside it needs larger diameter, proper insulation and adequate fall, because an exposed run up here will freeze. Flue terminal position needs to respect Building Regulations clearances from boundaries and openings. Gas work is carried out by Gas Safe registered engineers and you are entitled to see the card before anything starts.
See why homeowners across Caerphilly and the surrounding valleys choose Cardiff & Caerphilly Plumbers.
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Our engineers are stationed locally for rapid response across Caerphilly and the surrounding valleys.
We cover Cardiff, Caerphilly, Barry, Newport, Penarth and Pontypridd. Choose your area for local detail.