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    • COMMON PLUMBING FAULTS >
      • How to replace tap cartridge for quarter turn taps
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      • How to disconnect & reconnect a dishwasher
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    • HEATING FACTSHEETS >
      • Gas Rating
      • How to look after your home central heating
      • How to stop cold spots in your radiators
      • Flushing your heating system
      • Heating Systems – sealed or vented?
      • Things to consider when looking for a new boiler
      • Boiler breakdowns
      • How to tell if it’s time to replace your boiler
      • Boiler problems – what to look out for and when to contact a plumber
      • How to increase combi boiler pressure
    • How To Bleed A Radiator
    • How to Stop a Dripping Tap
    • How to Plumb Your Garden
    • How to Reduce the Energy Costs of Your Washing Machine
    • How To Unblock A Toilet
AGA Rayburn, service & repair engineers london, Plumbing and Heating
  • Home
    • About
  • Plumbing
    • Drainage
  • Boilers
    • Boiler Repairs Emergency call out service in London
    • Boilers Servicing
  • Aga Rayburn
  • Installation & PF
    • INTERGAS Boilers Installation
    • Gas Appliances Installation
    • Power flush
    • Which Boiler & Boiler Types
  • Services
    • Home Buyers Report
    • Gas Safety Certificate CP12
  • Contact Us
  • FAQ
  • Blog
  • Certificates & Accreditations
  • KNOWLEDGE BASE
    • COMMON PLUMBING FAULTS >
      • How to replace tap cartridge for quarter turn taps
      • How to replace a tap washer
      • Taps and shower valves
      • Mould in bathrooms and showers
      • Showers, flow and control
      • How to disconnect & reconnect a dishwasher
      • How to disconnect & reconnect a washing machine
    • HEATING FACTSHEETS >
      • Gas Rating
      • How to look after your home central heating
      • How to stop cold spots in your radiators
      • Flushing your heating system
      • Heating Systems – sealed or vented?
      • Things to consider when looking for a new boiler
      • Boiler breakdowns
      • How to tell if it’s time to replace your boiler
      • Boiler problems – what to look out for and when to contact a plumber
      • How to increase combi boiler pressure
    • How To Bleed A Radiator
    • How to Stop a Dripping Tap
    • How to Plumb Your Garden
    • How to Reduce the Energy Costs of Your Washing Machine
    • How To Unblock A Toilet

Heating Systems – sealed or vented?

Heating Systems – sealed or vented?

Sealed systems have an expansion vessel that absorbs the pressure as the water in the system expands due to the heat in the system. Whereas open vented systems have an expansion pipe that lets out the pressure. Open vented systems are more prone to rust in the system.

Over time this will reduce the effectiveness of the radiators and the boiler will need repairing. Chemicals can be added to the system to reduce this. However sealed systems are more efficient.



Sealed systems pros

  • Less rusting
  • Less likely to suck air in to the system creating air locks and rust
  • If a radiator is damaged, only half a bucket of water will leak from the system.

Sealed system cons

  • When the pressure reduces the boiled will stop working. (Regular servicing is needed)
  • A pipe must lead to outside for the pressure relief valve to dump the excess pressure when problems occur with the boiler

Open vented system pros

  • If the system is very old and has lots of small leaks the pressure will never stop the boiler from working
  • If the system is very old no excess pressure will be put on pipes and radiators creating leaks.

Open vented system cons

  • Less efficient
  • More rust in system
  • More space is taken up from the tank.
Please phone us for any queries or help on anything on 0208 150 7575.


www.plumblocal.net

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Satisfied Customers 

Perfect installation! Old floor system to a new wall boiler! 10 out of 10!
Excellent service, highly recommend, will be using for safety cert too, thanks!

Mrs  Keith / Ealing
The advice on what boiler to buy was helpful & the installation was very quick.
Karen Elliot / Camden Town

  • Home
    • About
  • Plumbing
    • Drainage
  • Boilers
    • Boiler Repairs Emergency call out service in London
    • Boilers Servicing
  • Aga Rayburn
  • Installation & PF
    • INTERGAS Boilers Installation
    • Gas Appliances Installation
    • Power flush
    • Which Boiler & Boiler Types
  • Services
    • Home Buyers Report
    • Gas Safety Certificate CP12
  • Contact Us
  • FAQ
  • Blog
  • Certificates & Accreditations
  • KNOWLEDGE BASE
    • COMMON PLUMBING FAULTS >
      • How to replace tap cartridge for quarter turn taps
      • How to replace a tap washer
      • Taps and shower valves
      • Mould in bathrooms and showers
      • Showers, flow and control
      • How to disconnect & reconnect a dishwasher
      • How to disconnect & reconnect a washing machine
    • HEATING FACTSHEETS >
      • Gas Rating
      • How to look after your home central heating
      • How to stop cold spots in your radiators
      • Flushing your heating system
      • Heating Systems – sealed or vented?
      • Things to consider when looking for a new boiler
      • Boiler breakdowns
      • How to tell if it’s time to replace your boiler
      • Boiler problems – what to look out for and when to contact a plumber
      • How to increase combi boiler pressure
    • How To Bleed A Radiator
    • How to Stop a Dripping Tap
    • How to Plumb Your Garden
    • How to Reduce the Energy Costs of Your Washing Machine
    • How To Unblock A Toilet