
TREPP & CO services
Unvented Hot Water Cylinders
Installation, servicing and repair of unvented cylinders, including expansion vessels and safety discharge.
Unvented cylinders give mains-pressure hot water to several outlets at once, which is why they suit larger homes and properties with more than one bathroom. They are also a controlled system that has to be installed and serviced by a qualified engineer.
We install, service and repair unvented systems, including the expansion vessel, temperature and pressure relief valves and the discharge arrangement.
When people call us about this
- Poor hot water pressure
- Water discharging outside
- Cylinder service due
- Second bathroom being added
What's included
Our unvented hot water cylinders work
New cylinder installation
Sizing based on real demand, pipework upgrades where needed and a compliant discharge route.
Annual servicing
Vessel charge, relief valves, immersion and thermostat checked so the safety devices stay reliable.
Pressure and flow problems
Weak showers, fluctuating temperature and cylinder discharge investigated and resolved.
Where we carry out this work
- Unvented Hot Water Cylinders in Barnet
- Unvented Hot Water Cylinders in Southgate
- Unvented Hot Water Cylinders in Enfield
- Unvented Hot Water Cylinders in Cockfosters
- Unvented Hot Water Cylinders in Whetstone
- Unvented Hot Water Cylinders in Finchley
- Unvented Hot Water Cylinders in Palmers Green
- Unvented Hot Water Cylinders in Potters Bar
- Unvented Hot Water Cylinders in New Barnet

05Contact
Get a quote for unvented hot water cylinders
Tell us what is going on and we will come back to you with a clear price and a realistic timescale. No obligation.
- 01A real person reviews every enquiry
- 02Clear pricing agreed before work starts
- 03Photographs welcome — it helps us quote accurately
- 04Homeowners, landlords and managing agents
