Kent · TN13
Cylinder & Pump (G3) in Sevenoaks
Cylinder, pump and unvented hot water system work covers installing or replacing a hot water storage cylinder, fitting a pump to boost pressure to showers or taps, and — where the system is unvented, meaning it's fed directly from the mains rather than a header tank — carrying out the installation and any subsequent work under G3 unvented hot water qualification, which is a legal requirement under the Building Regulations.
In Sevenoaks, that covers Riverhead, Dunton Green, Weald, Bat & Ball, Kippington. Sevenoaks is an affluent Kent town close to the Kent Downs National Landscape and extensive Green Belt land, with a historic core, well-established residential streets of substantial detached and semi-detached houses, and strong rail links into London.
Coverage
Areas we cover in Sevenoaks for cylinder & pump (g3)
Property styles in Sevenoaks
Sevenoaks has a significant stock of larger detached and semi-detached Victorian, Edwardian and interwar houses on generous plots, which frequently suit substantial rear or double-storey extensions and outbuilding conversions.
Planning considerations
Sevenoaks District Council is the local planning authority. A large proportion of the district is designated Green Belt, and parts fall within the Kent Downs National Landscape, both of which place additional constraints on new structures and extensions beyond normal permitted development limits.
How it works
Our cylinder & pump (g3) process
- 01
Assessment
Reviewing the existing hot water system, incoming mains pressure and flow rate, and what the household needs from it.
- 02
Specification
Agreeing cylinder size and type, and whether a pump is needed to meet pressure requirements.
- 03
Installation
Fitting the new cylinder or pump, including the safety fittings a G3 installation requires — expansion vessel, pressure and temperature relief valves, and tundish.
- 04
Commissioning and certification
Testing the system and issuing the relevant Building Regulations notification and commissioning certificate for unvented installations.
Also in this area
Other services we provide in Sevenoaks
Nearby coverage
Cylinder & Pump (G3) in nearby areas
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FAQs
Cylinder & Pump (G3) in Sevenoaks: FAQs
Do you provide cylinder & pump (g3) across all of Sevenoaks?
Yes, we cover the TN13 postcode area in full, including Riverhead, Dunton Green, Weald, Bat & Ball, Kippington.
What does G3 qualified mean and why does it matter?
G3 is the recognised qualification for working on unvented hot water systems, required under Building Regulations Part G because these systems store pressurised hot water and can fail dangerously if the safety devices aren't correctly installed or maintained. Always check an engineer's G3 qualification before unvented cylinder work is carried out.
Does an unvented cylinder need annual servicing?
Yes, and it's usually a condition of the manufacturer's warranty as well as good practice — the safety valves need checking annually by a G3-qualified engineer to confirm they're operating correctly.
Does Green Belt designation affect extending a house in Sevenoaks?
Green Belt policy applies primarily to new buildings and significant additions that would be disproportionate to the original dwelling, rather than ruling out modest extensions. We assess this against your specific property and its planning history.
Get a quote for cylinder & pump (g3) in Sevenoaks
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Last reviewed 2026-07-28.