Local plumbers · Ireland
Hot Water Cylinder Ireland: Costs, Types and Local Plumbers
New cylinder or a full replacement, with county-by-county guidance on what it costs, whether vented or unvented suits your home, and how to size and fit it right.
The choice
Hot Water Cylinders in Ireland: Vented vs Unvented
The right cylinder comes down to how your home is plumbed. A vented copper cylinder is fed by gravity from a tank in the attic and is the traditional Irish setup. An unvented cylinder runs at mains pressure for stronger showers with no loft tank, but it stores water under pressure and must be fitted by a competent installer with the correct discharge pipe and safety controls.
How Long Does a Cylinder Replacement Take?
A like-for-like vented swap takes a few hours to half a day. An unvented conversion or a relocation takes a full working day.
SEAI Grants for Water Heating Upgrades in 2026
Up to €1,200 for solar water heating and €6,500 for a heat pump, both of which need a compatible twin-coil cylinder.
Local coverage
Hot Water Cylinders by County Throughout Ireland
Cylinder work is never one-size-fits-all. What you pay, whether a vented or mains-pressure unit suits your home, and how fast a plumber can reach you all come down to where in Ireland you live. Choose your county for 2026 pricing that reflects real local costs, the cylinder options that actually apply to your area, and plumbers working on your doorstep.
Leinster
12 countiesOlder Dublin terraces and the commuter-belt homes across Meath, Kildare and Wicklow are full of ageing vented copper cylinders sitting in hot presses. Swapping a tired open-vent unit for a mains-pressure unvented cylinder, or a twin-coil cylinder ready for solar and a heat pump, is the upgrade installers see most across Leinster.
Munster
6 countiesCork and Limerick homes run the full range, from Georgian houses on gravity-fed vented cylinders to new builds plumbed for mains pressure. Across rural Munster and west Cork, twin-coil cylinders paired with solar thermal or a heat pump are increasingly the standard replacement when an old cylinder gives up.
Connacht
5 countiesOne-off homes and farmhouses across Galway, Mayo and the wider west often rely on a vented copper cylinder fed from an attic tank. With SEAI grant work driving heat pump and solar upgrades, well-insulated twin-coil cylinders sized for the whole house are in steady demand.
Ulster
3 countiesCavan, Monaghan and Donegal homes, many of them off the gas grid, lean on stored hot water from a cylinder for showers and taps. Replacing an old vented unit with a properly insulated mains-pressure or twin-coil cylinder makes a real difference to comfort through colder northern winters.
Browse plumbers in any county in the full plumber directory.
The options
Hot Water Cylinder Types: Which Is Right for Your Home?
Vented Cylinder
The traditional Irish setup: an open copper cylinder fed by gravity from a tank in the attic. Simple, reliable and the cheapest like-for-like swap. Supply and fit.
Unvented (Mains-Pressure) Cylinder
Runs straight off the mains for strong, balanced pressure at every tap and shower, with no attic tank needed. Stores water under pressure, so it needs a competent installer.
Heat-Pump / Solar Cylinder
A twin-coil cylinder takes heat from a solar panel or heat pump as well as a boiler or immersion. Needed for SEAI grant work and the right choice when planning a renewable upgrade.
2026 prices
Hot Water Cylinder Cost Ireland 2026: Typical Prices by Job
Typical like-for-like ranges. All figures include labour and VAT at 9%.
Cylinder replacement
€600–€1,100
Like-for-like vented copper cylinder, supply and fit
Unvented mains-pressure install
€1,200–€2,200
Mains-pressure cylinder with safety controls
Upsizing or relocation
€900–€1,600
Larger cylinder or a move with new pipework
Immersion element and thermostat
€150–€300
Replacement element and stat, supply and fit
Annual check
€70–€110
Recommended every 12 months for unvented units
For a full breakdown see our Ireland plumbing costs guide.
SEAI grants
SEAI Grants for Water Heating Upgrades
Grants are available for solar water heating (up to €1,200) and heat pump installation (up to €6,500). Both need a compatible twin-coil cylinder, so a cylinder upgrade is often the first step. Work must be carried out by an SEAI-registered contractor before any grant can be claimed.
See SEAI-registered plumbers →Hiring
How to Find a Plumber for a Cylinder in Ireland
A cylinder swap is standard plumbing work, but an unvented unit needs a competent installer. Here is how to hire correctly.
Browse Plumbers in Your County
Browse plumbers by county in our plumber directory, find someone near you, and contact them directly. For an unvented cylinder, check that they hold the relevant competency, as mains-pressure units carry discharge and safety requirements.
Get Three Written Quotes for the Work
Quotes should name the cylinder make, its capacity in litres, whether it is single or twin coil, and any pipework, controls or discharge work needed. A quote without a stated capacity is incomplete, since sizing drives both comfort and the price you pay.
Confirm SEAI Registration if Claiming a Grant
A compatible twin-coil cylinder is part of any solar water heating or heat pump job. Where a grant is involved, the wider works must be carried out by an SEAI-registered contractor, so confirm registration before the cylinder is ordered.
Get Your Commissioning Paperwork and Warranty
An unvented cylinder must be commissioned with its discharge pipe, expansion vessel and safety valves set correctly. Keep the commissioning record and register the warranty, as most manufacturers require an annual check to keep cover in place.
Hot Water Cylinder Questions From Irish Homeowners
How much does it cost to replace a hot water cylinder in Ireland in 2026?
A like-for-like vented copper cylinder replacement costs €600 to €1,100 in 2026, including labour and VAT at 9%. A full unvented mains-pressure install runs €1,200 to €2,200, while upsizing or relocating a cylinder is €900 to €1,600.
Vented or unvented cylinder: which is better for an Irish home?
A vented cylinder is cheaper, simpler and fine where a loft tank already feeds the house, but pressure depends on the height of that tank. An unvented cylinder gives mains pressure at every outlet with no attic tank, at a higher price and with stricter safety requirements. Homes with power showers and multiple bathrooms usually benefit most from unvented.
What size hot water cylinder do I need?
Sizing follows the number of bathrooms and occupants. A one or two-bathroom family home is typically well served by a 150 to 210 litre cylinder, while larger homes with several bathrooms move to 250 to 300 litres. Your plumber sizes the cylinder to peak demand so you are not left short or paying to heat water you never use.
What are the benefits of a mains-pressure unvented cylinder?
An unvented cylinder delivers strong, balanced hot and cold pressure at every tap and shower, removes the need for an attic tank, frees up loft space and cuts the risk of tank freezing or contamination. The trade-off is a higher fit cost and a required annual safety check.
Which cylinders work with solar panels and heat pumps?
Solar water heating and heat pumps both need a twin-coil cylinder, with one coil for the renewable source and one for the boiler or immersion backup. Fitting a twin-coil cylinder is a condition of the SEAI solar water heating grant and part of a heat pump install, so it is worth planning the cylinder around any future upgrade.
How long does a hot water cylinder replacement take?
A like-for-like vented cylinder swap takes a few hours to half a working day. Converting to an unvented mains-pressure cylinder, or relocating the cylinder, takes a full day because of the added controls, discharge pipe and pipework changes.
Find a Plumber for Your Hot Water Cylinder
Cylinder replacement and upgrade quotes from plumbers in every county. Contact them directly, no fees, no sign-up.