Power Flushing

Do You Need a Power Flush In Worcester?

Should the issue be due to poor quality system water, failing components as a result of sludge, cold spots in radiators, radiators failing to heat up, blocked heat exchangers or any other issue sludge can cause, we are here to help.

We offer a fixed rate power flushing service and are leading providers in the area. We are power flushing regularly and have a great deal of experience with the process. You are in the best of hands when you use us!

Power flushing is often done wrong, and as a result, consumers can end up paying far more trying to resolve sludge, scale and sediment related issues that they need to. There are many ways which the process could be done, but few correct ways. We have taken the time to explain this in great detail further down the page.

We adhere to the Approve Codes of Practice such as those set out by the Domestic Water Treatment Association and ensures treated water is physically examined, checked with a TDS meter (the total dissolved solids) to within 10% of the tap water supply and PH checked prior to inhibitor treatment.

So Why Use Us?

  • We are highly experienced power flushing experts
  • We offer a fixed price service
  • We are highly organised and punctual
  • We are one of the main providers for powerflushing in Worcester

What We Offer:

  • A professional service
  • Excellent value for money
  • Durable heating systems
  • Tailored solutions to your needs

We offer a complete range of solutions and will always advise you on the best course of action which will keep your total costs down, not just with initial costs. We only want to install central heating systems which have minimal maintenance requirements and will be as cheap to run as possible.

Check around the internet about us, you will find quality reviews and examples of what we do all over it. We are transparent, honest and take pride in not screwing the customer over.


“Sludge and scale are the leading cause of premature boiler and heating system failure. Any boiler that beats the lifetime statistics usually has clear system water within it that contains inhibitors, whereas boilers that are regularly having issues will almost always have dirty system water. There are a large number of heating systems that would benefit from a power flush, potentially saving the owners a lot of money in the long run.”

What Is Power Flushing?

Power flushing is the process where a high velocity, a low-pressure pump is used to loosen sediment and other unwanted matter (flux, solder, bacteria, etc) in wet central heating systems. Following this, the undesirable matter within the system water is extracted from the heating system.

The Correct Way To Power Flush

The correct way to do this is by adapting onto, or removing the central heating pump from the system and connecting the power flush machine to the “heart” of the system. Alternatively, if there are dedicated power flushing connection points or a filter is installed, in some cases, power flushing can be as equally effective when done through these points. Power flushing central heating systems through radiators and other methods will often result in poor results and is not a recommended or approved process. However, power flushing a single problematic radiator is acceptable.

To increase the speed of this process, when sludge (ferrous oxide) is causing an issue, magnetic filtration may be used to improve the process, which will reduce the volume of water used.

The Correct Use Of Chemicals

Using correct methods, equipment and suitable chemicals at the proper doses will increase the chances of power flushing success. Strong acid-based chemicals (these require neutralising with a separate product before being drained) will often be more effective than using a single flush product that identifies as “environmentally friendly”.

We stand by the use of dedicated, specialist power flushing acid chemicals such as Scale Breaker & FX2 instead of the use of such products as X800 on existing central heating systems.

Ferrous oxide, flux residue and limescale are the common solids that can be found in central heating systems. These can cause blockages and restrictions within heating systems, reducing or even preventing the flow of water and the transfer of heat. The power flushing chemicals we advocate will often breakdown such unwanted matter and allow it to be mobilised in the system water by the power flushing unit. More severe problems, such as dense blockages, especially in micro-bore pipework (8 & 10mm) can reduce the effectiveness of the process.

Power Flushing Microbore Systems

Micro-bore systems can be effectively power flushed, but the lower smaller diameter pipes restrict the flow of water; thus power flushing is not always successful. Additional methods can be employed to increase the amount of sediment removed from heating systems successfully, such as individual radiator flushing and draining the radiator individually post-treatment, but it must be understood that there are limitations to power flushing. The more obstacles put in the way of the process, the less effective it will be.

Blockages From Building Aggregates

Aggregates that may have contaminated the system during the installation process, such as materials used as the house building process, will often not be broken down by the chemicals. The power flushing process may not remove the particular foreign matter that may have collected in the system as a result of poor installation practices.

Issues with aggregates, causing restrictions/blockages within heating systems, are more prevalent in new-build properties. In modern homebuilding methods, central heating systems are put together in stages. If workers have left heating pipes open during the first fix process, it can allow debris from the site to contaminate the heating system. In some instances where we have suspected this, particularly where single, lower floor radiators have been the issue, we have had to recommend to remove the affected pipework before power flushing.

Why Power Flushing Can Not Always Remove Everything

Small pockets of discolored water containing sediment can get trapped in radiators where the flow of water becomes restricted by such things as radiator size, location, pipework diameter, the number of bends and pipework length. When sediment gets trapped, it is usually in one or more of lower level radiators. More often than not it will just be a small amount of fluid in the bottom of the radiator that will run clear quickly when drawn off. We advise lock shield radiator valves with drain-offs are fitted on all low lever radiators to allow for the removal of trapped sediment and ease of maintenance in the future.

Conventional Heating Systems

Header tanks (F&E tanks) that feed traditional central heating systems are disconnected during the process to prevent fluid overflow back into the tank. Over long periods, F&E tanks can become heavily soiled with contaminants such as sediment and when reconnected to the system will reintroduce unwanted matter back into the heating system. Where an F&E tank is accessible, we advise that the tank is removed and cleaned out during the power flushing process. However, inspection and/or the removal of F&E tanks are not always practical, due to possible locations. In such instances, if the client is not willing to pay for a replacement tank, the client must accept that sediment and other contaminants were left in the tank may re-enter the system.

Can Power Flushing Cause Leaks?

Power flushing will not cause leaks, but it can highlight defects in the heating system. Some examples of this are:

Fittings that have not been correctly jointed
Components, such as radiators or valves that sludge has been preventing water from escaping through a defect

Issues with components may become visible because the cleaning process has removed the corrosion/scale/sludge, thus allowing water to pass. Although not typical, if these problems do occur the cost of power flushing does not include the cost to such defects.

Is Power Flushing Effective?

Overall, power flushing is a very effective way to make significant improvements to the longevity and efficiency of a central heating system. A contaminated central heating system will often have increased maintenance costs, plus and decreased efficiency, which over time will lead to increased operational costs.

In our experience, the majority of central heating systems have contaminants present that are harming the system. The severity of this effect is often dictated to by the level of contamination. Repairs to the boiler and central heating systems will be reduced by ensuring that the water contained within the heating system is of good quality and treated with inhibitors.

We have yet to find a system that’s contaminated that has not benefited from a correctly applied power flush. Although restoring flow to all aspects of a central heating system is not always possible through power flushing. We have very high success rates for power flushing in Cheltenham.

Common Problems Caused By Sludge/Scale/Sediment

Conventional systems:

  • Radiators heat up when the system is set for hot water only
  • Hot tap water getting scalding hot
  • Hot tap water failing to heat up
  • Reduced pump life
  • Reduced motorised valve life
  • Kettling from the boiler
  • Overheating of the system
  • Cold spots in radiators
  • System water “pumping over” into the F&E tank
  • Thermostatic radiator valves failing to work

Combination (Combi) boilers:

  • Radiators getting warm when systems demand is for hot water only
  • Hot tap water getting scalding hot
  • Hot tap water has fluctuating temperatures
  • Hot tap water failing to heat up
  • Reduced pump life
  • Kettling from the boiler
  • Overheating of the system
  • Cold spots in radiators
  • Thermostatic radiator valves failing to work

Analysis of System Water

We test the central heating system water quality through physical examination and the use of electronic equipment. Although it is possible to have a laboratory test water samples, we would rarely do this in the domestic sector due to costs.

Electronic test equipment such as TDS meters and thermal imaging can be useful, but experience and physical examination within the heating system and the water contained within are the primary tools used to determine when sediment like sludge and scale is causing a problem.


Inhibitors are chemicals are put into systems with the central heating system water which helps prevent corrosion, limescale and organic growth. What they protect from and how effective they depend on the products utilised and their concentrations. Products vary in quality and effectiveness.

Frequently Asked Questions

Yes, but not with acid-based chemicals! Aluminium reacts readily with acids and strong alkalines, thus less aggressive chemicals must be used. Alternatively, it is possible to disconnect a boiler from the heating system where acid-based compounds are preferred. However, the boiler will still need cleaning to remove deposits internally from such things as the heat exchanger. Depending on the situation with the boiler, this may not be plausible.

It is very high, 99% of the time it will resolve the issue(s) without any further work. However, power flushing does have limitations.

We have seen situations where these chemicals are left in heating systems to pre-treat them one or two weeks in advance of power flushing and failed to remove blockages or clear the system of deposits which were removed in a short space of time once acid-based chemicals were added. We do not rate these chemicals.

Areas Around Worcester That We Cover

  • Broadwas
  • Broughton Hackett
  • Fern Hill
  • Bransford Bridge
  • Hallow
  • Kempsey
  • Callowend
  • Upper/Lower Broad Heath

See all the areas we cover here!