power flush cost?....................................

[AWheating]

Around 350 upwards. 100-150 for filter Best to thermal image the rads that are claimed to be struggling.

Ask for acid based cleaners to be used.

 

[Harvest Fields]

When you powerflush a system the rads aren’t supposed to be full to begin with mate

 

[Best]

When you powerflush a system the rads aren’t supposed to be full to begin with mate

My thinking also was that once you begin powerflushing the water builds up in the bottom of the rad, whether you start with a drained or nearly drained system.
I think that is a disadvantage compared with removing a rad and flushing it several times from empty, plus turning it upside down, filling some water into it and turning it over a few times to clean the vertical channels of rad and to have the water fall hard down on the base.
I flushed 3 rads on a job a few weeks ago that are well over 30 years old using a garden hose. Looking inside through the tappings of the single rad with a torch was interesting to see how long it took to make the base spotless.
Removing rads to flush them is not what I like to do, but it does seem to do a first good clean.
I think the Mag filters inspection can be misleading as a system water will only have dirt in the water later if it is disturbed - like if more powerflushing or cleaning chemicals used etc.

 

[firemant]

The old guy sounds like me.
I think he is correct. If anyone can use a powerflush and chemicals to clean rads thoroughly, then respect to them.
I prefer to remove each one first and hose them out. Flushing a system that is full of water tends to not disturb the dirt in bottom of rads. (You wouldn’t try power hosing the bottom of a bucket if it was full of water)
Flushing an empty system still has the problem of water build up in each rad.
You can flush the pipes by doing each rad.
I think nobody could argue that removing 90% of the crud in a system first before adding chemicals would make the chemical more effective.
I see a lot of systems that have been powerflushed and the water appears clean. But there is still undisturbed crud in the bottom of the rads.

PF'ing DOES work well.I have got microbore systems running in the past - and folk say you cannot PF them.

The problem is not the PF'ing - it is the appalling standard of workmanship prevalent in this industry.

It cracks me up when I see a boiler change done in a morning. With a PF. Impossible, unless the system was pretty clean. TBF, things have changed a tad since I did them regularly, but I allowed 6 hours for a PF on a standard 3 bed house.