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System Cleaning in Sheffield

The water quality of hearing systems has had a huge light shone on it recently with the longer warranties on boilers being void due to system water quality.

When a new appliance is installed the system should be flushed and then protected against future issues, this is in line with the latest British Standards, the HHIC benchmark and Boiler manufacturers instructions.

We offer our cleaning and water quality services through Sheffield and the surrounding areas.



This guide is something I have put together to provide prospective and current customer information on system corrosion and how we at BPH deal with it.

Understanding and preventing corrosion in a central heating system will ensure that the system is operating at its most efficient and will prevent damage to the system and components.

What is meant by corrosion in a central heating system?

From the time of installation and commissioning a central heating system will, potentially, start to corrode. This is because the water in the system will start to react with the steel in the radiators. To reduce the rate of corrosion, a plumber will flush out a newly installed system to remove any debris or substances likely to increase the rate or risk of corrosion.

The most common symptom of corrosion within a central heating system is sludge, a black, mud-like, deposit resulting from the reaction between the water in your system and the steel in the radiators.

The sludge can build up over a period of time in an untreated central heating system, and cause:

  • Damage to the boiler. 
  • Damage to radiators by causing pin holing and leaks.
  • Damage to the pump. 
  • Damage to the thermostatic radiator valves. 
  • Blocked pipework. 
  • Blocked and damaged hot water heat exchanger on a combination boiler.
  • System efficiency being reduced (less output from the radiators resulting in cold spots and cold rooms)

Historically a system should have been well designed and installed by a professional plumber and flushed out correctly as part of the commissioning process, the water in the system will stay clean providing a corrosion inhibitor was added after the flush and no maintenance or leaks have been carried out on the system.

If the system has been drained for any maintenance or repair and a corrosion inhibitor was not added when refilling the system, the system is again liable for problems with corrosion.

At BPH we have taken a different path and fill and flush system using a chemical-free process, we believe that these chemicals cause more harm than good to the system and their components and see it as a lazy way to not clean the system properly.

We have adopted a method these use in Europe using demon water, Germany have the standard of Vdi2035 as well as Austria having their own standard and some other countries too. They all revolve around the same idea: You take the oxygen out of the water, keep the conductivity low and the ph level correct for the system components and you won’t have the ingredients for the corrosion to take place.

Here's how we protect your central heating system

  • We start off by taking reading off your system water and see exactly what is happening. 
  • Use a product called a Thoroughflush to clean the system and then check the system water against your tap water to see if the readings are the same and similar. The Thoroughflush gives us the ability to reverse flow through the system at the turn of a switch. And removes around 30-40% extra to what would be removed by just flushing in one direction. Each rad will be flushed individually, radiators may be removed if required and flushed externally, usually towel rails. 
  • A thermal imaging camera will be used to check each radiator to confirm they have been properly cleaned. 
  • When we are happy we will that we will fill your using with our resin and check the water again to make sure it’s within the ranges we would like. 
  • We would also recommend fitting an air separator and a magnetic and particle filter. 
  • Readings again will be taken after a 10 week period to make sure everything is ok. 
  • Yearly checks will then be advised and usually advised to do at the same time as your annual boiler service to reduce costs installs of two visits.

We also supply and fit resin cartridges that can be left on site for top-up and filling of system water.

If you have system issues relating to water quality then give us a call and drop us an email and see how we can help you out.

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