East Sussex · BN7
Cylinder & Pump (G3) in Lewes
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 Lewes, that covers Cliffe, Southover, Landport, Nevill, Malling, Wallands. Lewes is the historic county town of East Sussex, built on a steep hillside above the River Ouse within the South Downs National Park, with a dense concentration of listed and historic buildings in its centre.
Coverage
Areas we cover in Lewes for cylinder & pump (g3)
Property styles in Lewes
The town centre includes a significant number of listed timber-framed, Georgian and Victorian buildings, often on constrained, steeply sloping plots, while the surrounding residential areas include Victorian terraces and 20th-century housing on the town's edges.
Planning considerations
Lewes District Council is the local planning authority, and the town sits within the South Downs National Park, which has its own planning authority function for certain matters and places significant weight on landscape and heritage impact. Much of the town centre is a conservation area with numerous listed buildings.
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 Lewes
Nearby coverage
Cylinder & Pump (G3) in nearby areas
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FAQs
Cylinder & Pump (G3) in Lewes: FAQs
Do you provide cylinder & pump (g3) across all of Lewes?
Yes, we cover the BN7 postcode area in full, including Cliffe, Southover, Landport, Nevill, Malling, Wallands.
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.
How does South Downs National Park status affect building work in Lewes?
Development within the National Park is assessed with particular regard to landscape character and setting, alongside normal planning policy. Combined with the town's conservation area and listed building status, this means early advice is particularly valuable in Lewes.
Get a quote for cylinder & pump (g3) in Lewes
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Last reviewed 2026-07-28.