What is a PowerFlush?
This is the procedure.
The Power flush machine pumps high velocity/low-pressure water around the system to remove loose debris from the system causing blockages and restricting flow.
The introduction of high strength chemicals further aids the Power flush process, dislodging and removing dirt, rust and harmful corrosive deposits from the system.
Each radiator is then isolated and flushed individually to ensure the system is left completely clean and blockage free allowing your system to run smoothly.
What are the benefits of having a Power Flush?
- Lower heating bills due to improved heating efficiency.
- Power Flush removal of discoloured water
- Quicker heat up times
- Radiator cold spots are cured so that the full surface of the radiator heats your room.
- Increases boiler and pump life
- Removing contaminants and extending central heating system lifespan
- Curing boiler noise
We have been trained to power flush Worcester-Bosch boilers.
Should you have a PowerFlush?
Powerflushing is a popular method of cleaning and maintaining a central heating system. A powerflushing unit sends water at high velocity through the system to dislodge and remove debris, limescale, and sludge build-up. A thorough powerflush will improve heat distribution throughout the property, subsequently lowering household energy bills and increasing system reliability
If sludge and debris are not removed from heating systems, it can accumulate in radiators, pipework and heat exchangers, causing severe blockages. This diminishes the transfer of heat and can result in a pipe, radiator valve and heating control servo valve damage. In some cases, this will eventually lead to the premature failure of the boiler.
The idea behind these devices is that corrosion within a sealed wet central heating system produces sludge. This which can block up boiler heat exchangers, pumps and radiators and that because this sludge is ferrous in nature (that is, it results from iron or steel corrosion), it can be trapped by a powerful magnet.
This theory is partially true. But sludge can also result from the corrosion of copper, zinc or aluminium components. This is nonferrous, and will not be caught by a magnet.
Ideally, your central heating system should not contain any sludge anyway, because it should be dosed with the corrosion inhibitor. However over time, this inhibitor becomes diluted and if your system is drained, has a leak or losses pressure at times then this inhibitor can become less effective. So here at Ability, we strongly advise a magnetic filter along with the manufacturers.
What is a magnetic filter?
A magnetic filter is device that helps collect the sludge that can build up in a central heating system.
Much of the sludge is made up of rust particles that have corroded and come away from inside pipes or radiators. A magnetic filter is made up of a large magnet that attracts these particles, and then filters them out of the system. This helps prevent blockages and keeps the water flowing through the central heating system.
Why would my heating system need a magnetic filter?
The iron and steel components in central heating systems are vulnerable to corrosion and rusting. This produces a sludge which can block different parts of the system, principally the boiler heat exchanger, pump or the radiators.
Old, cast iron pipes were usually a few centimetres in diameter but more modern pipework tends to be narrower, making blockages even more likely.
A blocked boiler will often overheat, causing the system to shut down. To remove a blockage, a boiler engineer may have to power flush your central heating system or replace the heat exchanger – both costly jobs.
A magnetic filter can help avoid these blockages and keep the system running freely by trapping any sludge before it reaches the boiler. A powerful magnet collects the debris, preventing it from damaging the boiler.
Some of these devices also include a filter which gathers non-magnetic deposits from corrosion of copper, zinc or aluminium central heating system components.
How can I install a magnetic filter?
If you’re having a new boiler installed, your boiler engineer may recommend that a magnetic filter is also fitted. Some boiler manufacturers will extend the boiler warranty if a magnetic filter is installed.
It’s also possible to add a magnetic filter to an existing system. The unit can be quite bulky and is fitted close to the boiler itself. This means that it’s not always practical to install a magnetic filter – if the boiler is inside a small cupboard, for example.
How do you maintain a magnetic filter?
The build-up of sludge inside the filter must be removed from time to time. Boiler engineers will usually clean the filter as part of an annual boiler service.
Can a boiler inhibitor fluid prevent blockages?
Another method of preventing sludge build-up is adding corrosion inhibitor fluid to the central heating system. Maintaining the correct dose of inhibitor is an important part of caring for your boiler and some manufacturers require evidence of this to keep any warranty valid.
Your central-heating engineer can check the levels during your boiler’s annual service.
A magnetic filter works alongside the corrosion inhibitor fluid to help maintain your central-heating system’s effectiveness. A belt and braces approach is going to be more effective than using one and not the other.
The engineer will add a corrosion inhibitor to protect your central heating system in future years. It will prevent internal corrosion and deterioration, sludge formation, scale deposition and boiler noises.
Boiler manufacturers insist that old heating system be thoroughly flushed before installing a new boiler and if not performed manufacturer warranty will usually be cancelled. We have years of experience for your Power Flush.
If you purchase a new boiler or new central heating radiators you should consider power flushing because whilst your new boiler is in pristine condition it will soon be contaminated by sludge, rust and debris which are in your old heating system causing components failure or affecting the performance of the system.
High-efficiency modern boilers have very narrow passageways in the heat exchanger and are very sensitive to rust, sludge, scale and other debris which can cause a blockage.
Only by power flushing can you be sure that a system is clean to the standards demanded by modern boilers and heat exchangers.
Comparing Power flush to traditional methods.
The method of flushing by using chemical agents followed several days later by repeatedly draining down the central heating system is very labour intensive, it requires at least two visits and doesn’t get rid of all the debris and problems often quickly return.
No matter how good the flushing agent was, the low flow rate causes that some debris settles back in the system.
Removing individual radiators, and flushing them with a hose outside the house, is equally time-consuming very messy and has no effect on deposits in the pipe work and elsewhere in the system.
Because these methods are very time consuming and labour intensive, the cost of it will be passed on the total cost of new boiler installation. The installer will not do it for free, and a system will not be completely clean!
We use latest technologies to perform power flush efficiently and thoroughly. We’ve always believed that successful power flushing is derived from moving water as fast as possible through a heating system to mobilise and transport the debris to a point where it can be forcibly discharged.
That’s why we use Kamco Clearflow CF90 Quantum power flush pump which can deliver 150l/min flow. The all important flow rate is achieved without increasing maximum pressure beyond 1.8 bars, to ensure that no damage will be done to a heating system. The flow rate is more than double that of most power flushing pumps on the market, enabling it to remove more debris from a system and in less time.
In many cases, a blocked Cold Feed is the big cause of problems with old heating systems-please see the photo of an example.