Power Flushing

Are You In Need a Power Flush In The Tewkesbury Area?

If your heating system has problems caused by poor quality system water, failing parts due to sludge, cold areas in radiators, radiators failing to heat up at all, blocked heat exchangers or any other problem which sludge may cause, then we can help.

We are the leading providers in the Tewkesbury area of a fixed rate power flushing service. We are highly experienced in providing the power flushing service and as a result our power flushing service is in high demand. Choose us for the best service and results!

Power flushing is regularly carried out incorrectly resulting in customers having to pay significantly more than they need to for rectifying sludge, scale and sediment related problems. There are many ways in which the process can be completed, but only a few are correct. We’ve explained further below.

In performing the power flush, we will follow the Approve Codes of Practice such as those set out by the Domestic Water Treatment Association, which make sure that treated water is physically examined, analysed with a TDS meter (the total dissolved solids) to within 10% of the tap water supply and PH checked before any inhibitor treatment.

So Why Use Us?

  • We are THE experts at power flushing
  • We offer a fixed price service
  • We are trustworthy and reliable
  • We are one of the leading power flushing providers in Tewkesbury

What We Offer:

A professional serviceExcellent value for moneyDurable heating systemsTailored solutions to your needsWe 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 procedure where a high speed, low-pressure pump is utilized to release sediment and other undesirable matter (flux, solder, bacteria, etc) in wet central heating systems. The unwanted matter within the system water is then removed from the heating system.

How To Power Flush Correctly

The correct power flushing method is by adapting onto, or taking out, the central heating pump from the heating system and attaching the power flush machine to the system’s “heart”. Alternatively, if there are allocated power flushing connection points or a filter, power flushing can be just as effective if done through these points. However, power flushing central heating systems through radiators or by using other methods may lead to poor results and are therefore not approved or recommended methods.

To make the flushing process quicker, when sludge (ferrous oxide) is causing a problem, magnetic filtration can improve the process and reduce the amount of water used.

Use Of Chemicals

Using effective techniques, equipment and chemicals at the correct levels increases the possibility of power flushing being successful. Powerful acid-based chemicals (these must be neutralised using another product prior to being drained) are usually more effective than using an “environmentally friendly”, single flush product.

As a company, we uphold the use of dedicated power flushing acid chemicals like Scale Breaker & FX2 instead of the use of products like X800 on existing central heating systems.

Ferrous oxide, flux residue and limescale are the solids commonly discovered in central heating systems. They often lead to blockages and restrictions within heating systems, lowering or even stopping the flow of water and heat transfer. The chemicals we advocate for power flushing usually disintegrate such unwanted matter and allow it to circulate in the system water by the power flushing unit. More significant issues, like dense blockages, particularly in micro-bore pipework (8 & 10mm) can reduce the efficiency of the method.

Power Flushing Microbore Systems

It is possible to effectively power flush micro-bore systems, however, the smaller diameter pipes restrict the flow of water; therefore power flushing may not always be successful. Alternative methods are available to increase the amount of sediment removed from microbore heating systems, such as individual radiator flushing and draining individual radiators post-treatment.

Blockages Caused By Building Aggregates

It is possible that such things as materials used during house building may have entered the heating system whilst it was installed and unfortunately these will not usually be broken down by the chemicals used. Any debris left behind following installation of the system may often result in the power flushing process not successfully removing all of the foreign matter.

As a result, new-build properties often suffer heating system problems caused by blockages or restrictions. In new builds, central heating systems are often built in stages. If pipes have been left open early on, debris from the site can easily enter the system. In these cases, we may recommend the removal of the affected pipework prior to the power flushing process being completed.

Why Power Flushing Can Not Always Remove Everything

Small amounts of discolored water, which contains deposits, often get trapped within the radiators where the water flow is restricted due to, for example, radiator size, where the blockage is, how wide the pipework is, how many bends there are and the length of the piping. Commonly, it is a tiny amount of fluid in the lower part of the radiator that will quickly be freed once drawn out. Our recommendation is the use of lock shield valves, which have drain-offs, on all low-level radiators to make the removal of sediments and future maintenance far easier.

Power Flushing Traditional Heating Systems

Where header tanks (F&E tanks) supply traditional (conventional) central heating systems, these are disconnected during the procedure in order to stop fluid overflowing back into the tank again. Over the years, F&E tanks can become riddled with contaminants such as sediment and when connected back onto the system, this allows the unwanted deposits to make their way back into the system once again. Where it is simple to access the F&E tank, we recommend the removal and cleaning of the tank during power flushing. It can sometimes be challenging to inspect or remove the F&E tank, usually because of its location. Where this is the case, if a customer is unwilling to pay to replace the tank, they must understand the risk of the sediment re-entering the heating system.

Can Power Flushing Cause Leaks?

No, power flushing will not result in leaks, but it can draw attention to problems within the system. Some examples are:

Equipment has not been properly jointed
Parts like radiators or valves where sludge stops the water escaping through a defect

Issues with parts can become obvious during the power flushing process because the water will then freely pass once the corrosion, scale and sludge has been removed. Even though it is unlikely to happen, when it does, the price of power flushing does not cover such defects.

Is Power Flushing Effective?

On the whole, yes, power flushing is a great way of improving the life expectancy and capacity of your central heating system. A blocked system usually leads to higher maintenance costs and a lower level of efficiency, which will eventually cause higher costs to operate properly.

In our experience, most central heating systems will contain contaminants which are preventing the system from operating correctly and efficiently. If you ensure the quality of and treatment of water within the heating system, prices for repairs to the boiler and system should be lower.

We are yet to encounter a system that has not improved through a correctly carried-out power flush. But unfortunately, it is not always possible to restore flow to all parts of a heating system through just the use of power flushing. We’re proud to say that we have a fantastic level of success within the Tewkesbury area!

The Common Problems Caused By Sludge, Scale and Sediment

Conventional systems:

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

Analysis Of The Systems Water

Heating engineers use their experience and visual detection to diagnose sludge and scale within the system. When in significant quantities, sediments like ferrous oxide are visible in sludge form. Limescale, however, is unable to be spotted in the water, only becoming obvious when it solidifies, becoming a white deposit. It is usual to spot limescale build up in parts of the system like the pipework.

Engineers use visual test equipment, turbidity tubes for example, their vast experience and TDS meter to find sediment within a heating system. However, this method will not be able to pinpoint the exact location of the contaminants within the system. The sole way of identifying exactly what exists is through the collection of water samples, sending them away to be analysed in a laboratory. Generally, this is an expensive thing to do and, as such, seldom used.

Following Power Flushing

Once a system has been power flushed, inhibitors are added to slow down corrosion, and the build up of limescale and contamination. The effectiveness of inhibitors is not clear as the majority of research on them is by the product manufacturers.

There are several types of product offering different levels of effectiveness. There is no impartial person who is able to say which product will make the biggest difference, but in our experience, most work best when used after power flushing. We have even encountered systems of up to ten years old, which have been treated, with no or very little build up.

One or two tubs of inhibitor are usually sufficient to use on a standard system. The majority of brands estimate one container for 100 litres (the equivalent of 10 radiators).

It is important to note that, though brand-dependent, inhibitors can change the colour of the water somewhat after use if they are coloured. The majority are clear, but in some cases, they can discolour the water.

Fernox, Sentinel and Adey are our preferred inhibitors. Our experience shows that all do an extremely good job over sustained periods of time.

Frequently Asked Questions

Yes, but not with acid-based chemicals! Aluminium reacts readily with acids and strong alkaline, thus less effective compounds must be used, or the boiler needs disconnecting from the heating system where acid-based chemicals need to be used.

It is very high, 99% of the time it will resolve the issue(s) without any further work. However, it will not be fully effective in all situations.

The process its self will not create leaks, but where components within the heating system are being held together by debris, the removal of the debris can result in parts weeping/leaking. These situations are rare, and where it does happen, it is usually a weep on such things as radiator valves.

Areas Around Tewkesbury That We Cover

  • Ashchurch
  • Walton Cardiff
  • Twyning
  • Beckford
  • Bushley Green
  • Uckinghall
  • Longdon

See all the areas we cover here!