Flushing Central Heating System and its Benefits for Performance and Lifespan of Your Boiler

Share Article

How to flush your central heating system, your boiler, radiators and pipework


flushing central heating

Central Heating and Boiler Power Flush Specialists

What is a powerflush?

If sludge and other fragments are not detached from heating systems, it can collect in radiators, pipelines and heat exchangers, causing major obstructions. This reduces the normal amount of heat circulation and can result in damaging effects to radiator valves, heating regulators and servo valves. In some circumstances this will ultimately lead to the untimely breakdown of your boiler. Any central heating boiler repair can be very costly and the power flushing will keep in good health your gas appliance for very long period of time. Any new boiler installation requires a power flushing of the central heating system as well. Not doing so will invalidate your boiler manufacturer warranty and is agains current gas regulations in the UK.
Powerflushing is a well-regarded technique of washing and preserving central heating systems. The powerflushing unit directs water at high speeds through to displace and eradicate build ups of dirt and debris. A comprehensive powerflush will increase heat circulation all over a property, thus reducing the costs of energy bills and improving dependability of your home system. Power flushing is also essential in order to get annual Landlords gas certificate CP12

Signs you need a powerflush

A preliminary inspection of the household ought to be done, as well as to consult with the owner. Places likely to have build-ups of sludge and debris need to be recognised, such as corrosion on pipework or failing radiators.
Other indications can include tainted looking water from the radiators and the reducing warm up times of each radiator. In these instances, a radiator powerflush makes the world of difference.
Water out the taps might also start to cloud up, owing to the limescale that will form inside it. Another condition where you’ll need assistance is when the heater within the boiler does not function at its usual proficiency.
When mechanisms become too rusted or damaged, the owner must be mindful that washing these may uncover leaks in the worst affected areas of corrosion.

Why should I have a Powerflush?

Flushing central heating system clears the system of the persistent sludge, leaving pipeworks and mechanisms blockage free and adds years of longer life to them.
There are many benefits of a central Heating Powerflush – here are some of the main points:

  • Increased Life of your Heating System

A clean and debris-free system means the lessening of corrosion in the pipe works and workings of your central heating. This results in an extended life for your boiler. Once the power flush is done, an optional inhibiting agent can be put through the whole system to help prevent anymore sludge build-ups. Power Flushing can often maintain the average lifespan of your heating system to beyond 10 years.

  • Greater Effectiveness

After flushing is complete, your heating will be able to work without the stresses and strains of a corroded system. Your central heating will do its job as well as a brand new system and rise by up to 40% efficiency –cold radiators and noisy boilers will be a thing of the past!

  • Lowered Energy Bills

With increased efficiency, radiators will begin to heat up faster, and in turn, the rooms are warm up quicker. This will be done without the need to turn the central heating on full, which results in less consumption of energy - reflecting in large savings of your energy bills.

  • Long-term Effects

If your boiler is serviced recurrently, your central heating system shouldn’t need Powerflushing again for more than 10 years – that’s 10 years free from cold radiators, leaky units and systems full of sludge!

How to setup the powerflushing unit

Before establishing the powerflushing procedure, you’ll must guarantee the system is properly installed to utilise the Powerflow unit.
1.    Switch off all electrics by isolating the system. Take care to fully open every lock shield valve and radiator wheel head.
2.    Make sure the thermostatic radiator valves are either disconnected or turned to their highest point. Additionally, check all diverters and zone valves are both open and in a locked position.
3.    Thermal store cylinders should all be isolated.
4.    Select the ideal point to connect the Powerflow to the unit. It must be within reach of an appropriate waste-pipe and close to a suitable mains water source. Try using a residual current device when joining the pump to the electrical plug.
The powerflushing unit is attached to the system via flushing adapters. These are used where the filter is fitted. Otherwise, it can be attached with the flow and return pipes on the boiler, and you can also install the system onto a circulator pump by utilising a powerflow pump head adapter. Lastly, you could attach the system to the radiator (though this decision should be made only if there isn’t another connection point accessible.)
5.    Join each of the dump discharge pipe, overflow and mains water supply, safeguarding the closure of every isolating valves.
6. Fasten the powerflushing filter onto the flow valve with the female camlock connectors.
7. The other end of the hose should joined to the powerflushing filter with the male camlock connectors.

Start powerflushing

Switch on the Powerflow machine to begin a preliminary flush to eliminate the unit water. Top-up with new water and measure out the required amount of Powerflushing Cleaner. Ensure the cleaner has circulation and start the process of dynamic balance flushing (withdrawing the flow intermittently).
8. Switch off every radiator running on the machine, apart from one.
9. Once the powerflush unit is up and running and is topped with fresh water, reverse and circulate the course of the flow in 1-2 minute intervals.
10. Marginally open the mains inlet and dump valves. Be sure that the dump pipe is discharged into a suitable drain outlet.
12. Slowly open the dump valve more, being sure to balance the flow via the inlet. Try and use the max discharge speed that the mains water supply can offer. Carry on circulating the powerflow during this process.

After the Powerflush

Lastly, after removing the unit and reinstalling the system, it’s a good idea to add protector fluid. Central heating protectors certify enduring defence against corrosive build up, limescale and uphold maximum productivity of the system.
1. Use the protector through either the filling loop, filter or a radiator. This can be inserted rapidly into systems, lessening time spent on site.
2. Keep circulating this protector fluid until the system gets up to a working temperature.
3. Reset the panels and give the system a check-up run.
The system ought to be comprehensively powerflushed.
The idea behind this, is to generate a strong flow of clean water under carefully monitored settings, to eradicate sludge from out of the system.


Share article on social media or email:

View article via:

Pdf Print

Contact Author

Pawel Orzeszak
since: 11/2014
Follow >
Follow us on
Visit website