info@pinnacleplumbingandheating.co.uk 

Central Heating Systems 

Your central heating system plays an important role in your home - keeping you supplied with the heat and hot water that make life so much more comfortable. Pinnacle Plumbing and Heating have over 25 years of experience installing and maintaining central heating systems in domestic and commercial properties ranging from simple valve replacement to complete central heating system installation. 

Centtral Heating System Installation & Repairs 

We specialise in servicing and repairing central heating systems.  
 
We offer a competetive service for powerflushing which will make you system work more eficiantly, and offer advice and no obligation quotes for central heating problems or full instilations or upgrades. 
Central heating systems are not confined to the wet radiator system traditionally installed in homes, they can also include: 
 
Wood burning stoves 
Oil heating systems 
Underfloor heating 
Electric heaters 
 
We have a wealth of experience in installing, maintaining and upgrading all of these systems. 
Whatever your requirements, Pinnacle Plumbing and Heating can assist you to maintain and improve your domestic or commercial heating system including: 
 
Oil Tank Installation 
Power flushing 
Radiator replacement 
Radiator valve replacement 
Thermostat installation and repair 
Rayburn servicing 
Underfloor heating installation 
Unvented hot water cylinder installation 

1. Open vented hot water systems 

This system uses many different parts to heat the water. It consists of a hot water cylinder, a cold water storage cistern (tank), special pipework (known as an open vent pipe), and a heat source to heat the water. There are two types of open vented hot water; direct heating and indirect heating: 
 
Direct heating – the water is heated directly from the heat source either by an immersion heater or by the boiler. 
 
Indirect heating – the central heating and the hot water are separate. The water is heated via a coil (heat exchanger) from a boiler. This is done because there is a set of radiators connected to the boiler, in this case water in the central heating system slowly becomes contaminated by iron residues from the radiators which would make the hot water unusable for washing. 
 
The cylinder - is the main part of the open vented hot water system; this is where the hot water is heated. The heat can come from an immersion heater, directly from a boiler or indirectly from a boiler using a coil fitted inside the cylinder. Often the indirectly heated cylinders come with an immersion heater back up in case of a boiler breakdown. 
The cylinder coil (heat exchanger) - is the tube that is often fitted to a cylinder to heat up water using the water from the central heating system. The pipe itself is coiled up inside the cylinder to give as much chance as possible for the pipe to ‘touch’ the water in the cylinder and heat it up. 
 
The storage cistern - is the reservoir of cold water used to supply the cylinder. This is always positioned above the cylinder to give a head of pressure (to make the water flow out of the cylinder). 
 
The open vent pipe - is the main safety setup for an open vented hot water system. It helps the system cope with the expansion of water in the system. The open vent pipe should end in the storage cistern allowing for the control of expansion of the hot water in the system. 

2. Unvented hot water systems 

These systems are far more complicated, and have many more parts to them but do allow near mains pressure hot water supply. They are designed to do away with the storage cistern and operate at a much higher pressure than the open vented system. 
 
Pressure reducing valve -This is placed on the incoming cold water main pipe to the hot water system to reduce the water pressure slightly and keep it at a constant level of pressure. 
 
Line strainer - This is placed on the incoming cold water main pipe to filter out any particles that might come from the cold water system, because of the sensitive nature of some of the components (a small piece of grit could cause them to malfunction), the strainer keeps them clear. 
 
Expansion vessel - This is used to deal with the expansion of the water in the system as it is heated. As water gets warmer it gets bigger, by up to 4% in volume. The water has to go somewhere, the expansion vessel is designed to store this extra water and stop the parts of the system bursting. 
 
Temperature and expansion relief valve - This valve is also part of the ‘sealed’ heating system. It is designed to remove pressure from the system. 
 
The tundish - This is connected to the pipe coming from the relief valve. This device is placed in the pipeline to alert you to a fault in the system, as you will be able to see the water flowing out of the safety valve(s). 
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