Power Flushing

Looking for a Power Flushing service In Malvern?

Should the problem you face be because of poor quality system water, parts stopping working due to sludge, cold spots in radiators, radiators not heating up, blocked heat exchangers or any other problem sludge can create, we can offer assistance.

For a fixed rate, we are able to provide a power flushing service and are the best around. We do this on a regular basis and have a high level of expertise with it. Choose to go with us and you’ll get the best service possible!

Power flushing is regularly carried out incorrectly resulting in customers paying a far greater amount than ought to be necessary to try to sort out issues caused by sludge, scale and sediment. There are countless ways power flushing could be carried out, but only a few ways that will actually give the best results. Read more about how we operate further down.

We strictly follow the Approved Codes of Practice, for example those of the Domestic Water Treatment Association, and make sure that we physically examine the treated water, use a TDS (total dissolved solids) meter to within 10% of the tap water supply and examine the PH before treating with inhibitors.

So Why Use Us?

  • Experts at power flushing
  • All inclusive price
  • Reliable and organised
  • Best at what we do in Malvern

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 a service we provide where a high speed, low-pressure pump is used to loosen sediment and other undesirable things (flux, solder, bacteria, etc) with central heating. After that, unwanted matter within the system water will be removed from the system.

The Proper Way To Power Flush

The proper way of carrying it out is by adapting onto, or taking off the pump from the system and connecting the machine to the “heart” of the system. As an alternative, where there are specific power flushing connection points or a filter, in some cases, it can be carried out through these points and prove to be just as effective. It is not recommended or approved to attempt power flushing central heating systems through radiators as the results are largely poor. It is, however, possible to flush one radiator on its own.

To speed up this process, when sludge (ferrous oxide) is bothersome, magnetic filtration can improve the process, reducing how much water is needed.

Using Chemicals Correctly

Using correct methods, equipment and suitable chemicals in the recommended amounts will increase the possibility of power flushing succeeding. Potent acid-based chemicals (must be neutralised prior to draining) will have a bigger impact over a single flush product that deemed to be “environmentally friendly”. We recommend power flushing acid chemicals like Scale Breaker & FX2 rather than products like X800 on existing systems.

Ferrous oxide, flux residue and limescale are the most commonly found problems within a central heating system; they can lead to blockages within and limitations of the systems, reduction of water flow and heat transfer not being effective. The chemicals we recommend will usually break down such problems and the process will then allow it to move freely. More significant problems, like solid blockages, especially in narrow pipework (8 & 10mm) can prevent power flushing from working as effectively.

Power Flushing Microbore Systems

Micro-bore systems can be power flushed as well, but the narrow pipes limit the water flow and, as a result, it is not always quite as effective. However, extra measures can be taken to allow more sediment to be taken out of the system, like the flushing of a single radiator and draining radiators individual after the process has been carried out. It is, however, imperative to remember that power flushing does have its limitations and the more issues there are, the less successful it will be.

Blockages Caused By Building Aggregates

Aggregates that may have got into the system while it was being installed, like building products, often fail to be dissolved by the chemicals. Poor installation practices result in the power flushing process not being entirely effective at removing foreign matter.

Troubles with aggregates, which restrict and cause blockages within pipework, are seen more frequently with new-build homes. Nowadays, central heating is built in stages. If pipes have been left open at all, bits from the site can enter them easily resulting in the contamination of the system. On occasions, where this problem has been suspected, usually in single radiators on the lower floors, we have recommended the removal of the pipework prior to carrying out the power flushing process.

Power Flushing Cannot Remove Everything

Tiny areas of discoloured water containing sediment can become lodged in radiators where water flow is reduced caused by things like radiator size, location, pipework diameter, the number of bends and pipework length. When sediment gets caught, it is more commonly in a lower level radiators. Frequently, it will just be a tiny bit of fluid in the base of the radiator that will quickly run clear again once drained. We recommend that lockshield radiator valves including drain-offs are added to all low lever radiators to assist the straightforward removal of trapped matter and simple maintenance in years to come.

Standard Heating Systems

Header tanks (F&E tanks) which provide water to traditional systems are disconnected during the power flushing to stop fluid returning to the tank. Over time, F&E tanks can become heavily soiled with impurities like sediment and when connected back to the system unwanted matter will return into the system. Where an F&E tank is accessible, we suggest that it is removed and cleaned out. Yet, assessment of and/or the removal of F&E tanks are not always options, due to possible locations. In such cases, if the client does not wish to cover the costs of replacing the tank, they must understand that sediment and other contaminants remain in the tank and may find their way back into the system.

Can Power Flushing Cause Leaks?

Power flushing does not cause leaks itself, but it can cause problems to become evident. For example:

Fittings that have not been properly jointed
Parts like radiators or valves where sludge has been the only thing stopping water from escaping through a pipework defect

Issues may become apparent because the cleaning process has removed the corrosion/scale/sludge, thus allowing water to flow efficiently. Although not a regular occurence, it does happen and the price for power flushing does not cover fixing these defects.

Is Power Flushing Effective?

On the whole, power flushing is a superb way of improving the lifespan and efficiency of the heating system. A contaminated system will often lead to greater expenses and less efficient operation over time.

In our experience, most central heating systems contain contaminants which are impacting negatively on the system. How detrimental this is depends on the extend of the contamination. Boiler and heating system repairs will be needed less if the system water is better in quality and has been treated using inhibitors.

We have not yet encountered a contaminated system which has not improved following a correctly carried-out power flush, although restoring flow to all areas of a central heating system is not always feasible through power flushing. We are experienced and have had great results in Malvern.

The Common Problems Caused By Sludge, Scale and Sediment

Conventional systems:

  • ‘Hot water only’ setting used, but radiators still heating up
  • Hot tap water scalding hot
  • Hot tap water cold
  • Limited pump life
  • Limited motorised valve life
  • Kettling from the boiler
  • System overheating
  • Radiator cold spots
  • System water entering the F&E tank
  • Thermostatic radiator valves failure

Combi boilers:

  • ‘Hot water only’ setting used, but radiators still heating up
  • Hot tap water scalding hot
  • Hot tap water erratic temperatures
  • Hot tap water failing to heat up
  • Limited pump life
  • Kettling from the boiler
  • System overheating
  • Radiator cold spots
  • Thermostatic radiator valves failure

Analysis Of The Systems Water

Usually, sludge and scale within the heating system will be identified by heating engineers through sight and experience. Sediments, like ferrous oxide when there is enough present, will be obvious in the water in the form of sludge. Limescale, conversely, cannot be easily seen in the water, only becoming obvious when it hardens forming a white deposit. Limescale formation is usually spotted in parts of the heatings system like pipework.

Utilising visual test equipment like turbidity tubes, experience and TDS meters is good practice for finding sediment within the heating system. This does not, though, give a precise identity for the contaminants. Water samples followed by lab testing is actually the only method to identify exactly what is in the system. On the whole, this is pricey and rarely undertaken.

Following Power Flushing

Once the system has been completely flushed, we add inhibitors to reduce corrosion, and the build up of limescale and biological contamination. How effective inhibitors really are is debated because the majority of the research stems from the manufacturers.

There are several manufacturers, all of whom are different in terms of effectiveness. It is impossible for anyone unbiased to state which produce is the best, but from our years of experience, the majority do work well in conjunction with a proper power flushing having been carried out. Where an up to 10 year old system has been treated, we have encountered little to no sediment formation.

On average, 1-2 tubs will suffice to treat a standard heating system. Most manufacturers will work on one container per 100 litres (or roughly 10 radiators).

It is important to take into account that inhibitors, brand dependent, can discolour the water slightly after being used, depending on the colour of the product. Most are clear, but can, at times, result in a tinted colour of the water.

We recommend Fernox, Sentinel and Adey inhibitor products, all of which work very well over sustained periods.

Frequently Asked Questions

Yes, but not using acid-based chemicals! Aluminium reacts quickly to acids and strong alkaline, therefore less effective products must be used. Alternatively, the boiler could be disconnected from the heating system where acid-based chemicals can be used.

In 99% of the time it will rectify the problem(s) without anything further needing doing. There are, however, certain cases where power flushing does not have the desired result.

The process does not cause leaks, but where trapped things become dislodged, this can lead to parts of the system beginning to weep or leak. This is a rare occurrence, but when it does happen, it is often around things like the valves on the radiators.

Areas Around Malvern That We Cover

  • Leigh Sinton
  • Rhydd
  • Hanley Castle
  • Hanley Swan
  • Colwall
  • Cradley
  • Little Malvern

See all the areas we cover here!