Related services
Related plumbing services
These related services can help if your plumbing issue involves more than one part of the system.
Vented Hot Water Cylinder Plumbing
A vented hot water cylinder normally forms part of a gravity-fed system supplied by a cold water storage tank. These systems can be reliable, but performance depends on the cylinder, feed arrangement, controls and surrounding pipework.
REZ Heating & Plumbing Services works on vented cylinder plumbing across Colchester, Essex and Suffolk.
Helpful guidance
Vented and unvented cylinders
A vented cylinder is supplied from a cold water storage tank, usually located in the loft. Hot-water pressure is created by gravity.
An unvented cylinder is supplied directly from the mains and operates under pressure with additional safety controls.
Identifying the cylinder type is important before any fault or replacement is considered.
Common vented-cylinder problems
Typical issues include:
- Poor hot-water flow
- No hot water
- A leaking cylinder or connection
- Air locks
- A noisy feed tank
- Overflow from the storage tank
- A failed immersion heater or thermostat
- Corroded pipework
- Insufficient insulation
- A cylinder that is too small for the property
Poor flow is not always caused by the cylinder. Restrictions, valves, storage-tank level and pipe routing can all affect performance.
Feed and expansion arrangements
Problems can occur when:
- The float valve does not shut off
- The feed pipe is restricted
- The open vent is incorrectly arranged
- The tank water level is wrong
- Pipework contains air locks
- The storage tank is contaminated or damaged
The cylinder and loft tank should be considered as part of the same system rather than as unrelated components.
Repair or replacement?
Repair may be possible when the problem is limited to:
- A thermostat
- An immersion heater
- A valve or connection
- A feed issue
- Associated pipework
Replacement may be more appropriate when the cylinder itself is leaking, badly corroded or unsuitable for the property’s needs.
Real work examples
Recent vented cylinder plumbing projects
These are genuine examples of completed vented cylinder and pipework jobs carried out by REZ Heating & Plumbing Services across Colchester, Essex and Suffolk.
FAQs
Questions customers often ask before booking
Why is my hot-water pressure low?
Vented systems rely on gravity. Tank height, pipe size, restrictions and the system layout all affect flow.
Is a vented cylinder the same as an unvented cylinder?
No. A vented cylinder is normally supplied by a loft tank, while an unvented cylinder is supplied directly from the mains and uses pressure controls.
Can a leaking cylinder be repaired?
Leaks from valves or connections may be repairable. A leak from the cylinder body usually means replacement is required.
Can a shower pump be fitted to a vented system?
Often, yes, provided the storage capacity, pipework and system arrangement are suitable.
Ask Rez for practical advice
Need help with a vented hot water cylinder?
Send photos of the cylinder, surrounding pipework, controls and cold water storage tank if accessible.
Call, WhatsApp photos or request a quote when you are ready.