Installing or replacing a hot water cylinder can vary in complexity depending on the type of cylinder, access to the airing cupboard or loft space, and the condition of the existing pipework. In many cases, the system needs to be drained before the cylinder can be safely disconnected and replaced. The time required usually depends on the size of the cylinder and how accessible the connections are.
Below is a general guide to labour costs for hot water cylinder installation and replacement.
Hot Water Cylinder Replacement
Replacing an existing hot water cylinder with a similar model in the same location is usually straightforward when the existing pipework connections line up correctly.
Typical labour cost: £300 — £550
Time: around 4–6 hours
New Hot Water Cylinder Installation
Installing a hot water cylinder where pipework needs adjusting or connections need repositioning will normally take longer.
Typical labour cost: £400 — £700
Time: around 5–8 hours
Immersion Heater Replacement
Replacing an immersion heater element is normally quicker than replacing the entire cylinder, although the system may still need to be partially drained.
Typical labour cost: £120 — £220
Time: around 1–2 hours
When costs can vary
Labour costs can change depending on the type of cylinder and accessibility of the installation. Additional time may be required if:
the system needs fully draining
pipework needs adjusting or replacing
the cylinder is located in a tight airing cupboard or loft
valves or controls need replacing
corrosion or seized fittings make removal difficult
All prices shown are labour-only estimates intended as a general guide. The final cost is confirmed after seeing the job and checking the existing installation.
