Power Flushing

Do You Need A Central Heating Power Flush In Leominster?

We are local power flushing experts who undertake related work on central heating systems throughout the local areas regularly. We are regularly resolving problems for customers who have poor performance issues and damage that is a result of sludge, sediment and limescale formation within a heating system.

Sediments, in particular, central heating sludge ruins boiler and central heating system components. Sludge can reduce the lifespan of components by many years, resulting in significant increases in maintenance frequency and costs, in addition to reduced performance and efficiencies.

Power flushing takes skill and ability to do thoroughly and correctly. Countless times we have witnessed consumers have to pay multiple times for the same service, as it was not done correctly the first, second or even third time! You really should only have to pay once!

There are more ways in which a customer can lose money. Whoever does the power flush can make many grave mistakes and cause damage within the heating system. Not removing chemicals entirely, or using the wrong chemicals is a common occurrence which can lead to damage. Poor connection methods and practices can cause further issues.

So Why Use Us?

  • We are highly experienced
  • We offer fixed prices
  • We are punctual and keep to appointments
  • We provide a high-quality service

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.”

How Does Power Flushing Work?

Power flushing involves using a machine with a large pump that operates at high-velocity, but low-pressure. This machine is typically known as a power flushing machine.

The machine is used to circulate chemicals at a high-velocity around a heating system to break down unwanted matter, such as flux, central heating sludge, limescale and other sediments and then remove them from the system through purging or filtering.

The power flushing machine works best when connected through the heating systems central pump. Sometimes other connect points can be used, such as those through filtration connection points and boiler jigs.

Power flushing through radiator pipework is usually less effective. It is not always possible to avoid, depending on the situation, but this is always our least preferred method

Power Flushing Chemicals

Chemicals used at the correct doses will produce the best results when used correctly with the right equipment. However, all chemicals are not equal; many will produce unsatisfactory results, even with prolonged pre-treatments.

We prefer the use of strong acid-based chemicals wherever possible as this will often be more effective than non-acidic products. Non-acidic power flushing chemicals are less effective, and in our opinion, some are a complete waste of time.

Without a strong chemical reaction hardened deposits, such as limescale and dense central heating sludge will not be broken down enough to be mobilised by the power flushing machine.

Microbore Pipework

Microbore pipework restricts flow and therefore reduces power flushing performance. Although we power flush many central heating systems on microbore with great success, due to the restrictive nature, it is not always possible to remove all the sludge, and some dirty water and deposits may still exist in the low parts of the radiators.

Where lock-shield radiator valves that have built-in drain offs are present, it is much easier to flush the radiators out and have a higher removal rate of sludge.

Non-removable sediments

In new-build properties, extensions and renovations, where poor practices exist, it is possible for building matter, such as dust, sand, cement and plaster to get into open-ended pipework. If severe enough, these can block pipework solid and prevent power flushing from being successful.

Where this is suspected, it is often best to cut out the affected pipework, if the location is known, and then power flush the system afterwards. Power flushing chemicals and the process is not effective against hardened cement, mortars or plasters.

Feed & Expansion Tanks

Conventional heating systems use what is known as a feed and expansion (F&E) tank to keep water levels full in the central heating system and accommodate the expansion of water within the system as it is heated up, or if it overheats.

F&E tanks can collect matter from the loft when their lids are missing, plus they are prone to microbial growth, along with sludge making its way into the tank. These tanks should be cleaned out where-ever practically possible to prevent the unwanted matter from re-entering the heating system

Can Power Flushing Cause Leaks?

Power flushing does not cause leaks, but where fittings and equipment have not been correctly jointed, such as unsoldered fittings, or where sludge, scale or sediment is plugging a breach in the system, such a split or corroded radiator, the water can pass following a power flush, thus leaving a leak.

Is Power Flushing Effective?

Power flushing is the best method to-date for resolving issues with central heating sediment. It is highly effective and has high success rates when done correctly.

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

Testing Water Samples

Combining testing methods such as turbidity tests, TDS meter readings, temperature differentials, visual indications and experience are the best ways to identify issues.

What exactly is causing the issue is not always known for sure. Sludge will often be apparent due to its colour and tendency to discolour the central heating water. The only sure way to know what is in the system water is to use a lab test, which are not commonly used in domestic situations due to costs.

Inhibitor Use

Post power flushing, inhibitors are introduced to the system water to reduce the corrosion process. Good-quality inhibitors will do this well, plus there are other products to deal with microbial growths and limescale.

W prefer Fernox, Sentinel and Adey products as they have always worked without fault for us and have a long track-record.

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 certain 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 Leominster That We Cover

  • Luston
  • Kingsland
  • Monkland
  • Ivington
  • Stoke Prior
  • Hope Under Dinmore
  • Kimbolton
  • Mortimers Cross

See all the areas we cover here!