Cylinders & pumps
Hot water cylinders for reliable hot water at good pressure.
Copper cylinders, pre-insulated cylinders, unvented pressurised cylinders, immersions and shower pumps. If you are running out of hot water or the pressure is poor, the answer is usually in the hot press.
In short
If you are running out of hot water or the pressure is poor, the fix is usually in the hot press. It might be a larger or better-insulated cylinder, a new immersion, a shower pump, or an unvented cylinder for mains-pressure hot water. We check your mains flow before recommending an unvented cylinder.
Updated 18 October 2026 · C. Kenneally Heating & Plumbing
What we take on
- Cylinder replacement, including larger cylinders for bigger households.
- Unvented (pressurised) cylinders for mains-pressure hot water throughout.
- Immersion element and thermostat replacement.
- Shower pumps — supply, fit and repair.
- Heat pump cylinders as part of a heat pump install.
Unvented cylinders
An unvented cylinder runs at mains pressure, so every tap and shower gets strong flow without a pump. It needs a good mains supply and safety devices that must be fitted and checked by someone qualified to do so. We check your mains flow before recommending one.
Questions
Frequently asked questions
What is an unvented cylinder?
A pressurised hot water cylinder fed directly from the mains, so every tap and shower gets strong flow without a pump. It needs a good mains supply and safety devices fitted and checked by someone qualified.
Why am I running out of hot water?
Common causes are a cylinder too small for the household, a failed immersion element or thermostat, poor insulation, or a boiler or valve problem on the heating side. We check each before recommending a replacement.
Can you replace an immersion element?
Yes. We replace immersion elements and thermostats, and fit insulated or larger cylinders where the old one is the real problem.
Book a service or request a quote.
Book a service or ask for a price online, and attach a photo of the boiler, the leak or the job. Christy replies with a fixed price or a time to call, and nothing starts until you have agreed it.
RGI registered · OFTEC registered · SEAI registered · Public liability insured · Cork City & surrounding area