Best way to chemical flush heating.

[Thegift]

Got a customer asking me to try chemical flush heating rather than a powerflush to save money....

currently has a logic combi with magna clean.

was thinking drain down refill with x800, open all rad valves fully then get the heating on full for a few hour cycles.

Leave it it a week then drain down refill with x100 and hope for the best?

Is there a better way of doing it?

 

[REDSAW]

lot better ways in less than an hour.
first point is, if its a logic+ why does it need flushing?
should have been done properly on install!

 

[Thegift]

lot better ways in less than an hour.
first point is, if its a logic+ why does it need flushing?
should have been done properly on install!

last installer said it was clean! Made a right cockup on the install.

 

[hammers4spanner]

never quite fully convinced of chemical flushing

 

[Alpha man]

Magnacleanse.

 

[newcastle phill]

Just tell him its a false economy. Chemicals are of little use if they cant circulate properly imho.

 

[Ray Stafford]

never quite fully convinced of chemical flushing

We did it for years though hammers before all these new-fangled powerflushes started printing money like magic!

 

[hammers4spanner]

We did it for years though hammers before all these new-fangled powerflushes started printing money like magic!

Its fine on system that are not to bad however if you don't have a power flush and its a heavily sludged its rads off job like the old days .

 

[flat Eric]

The chemicals are only to help break down the Iron oxide/sludge, the power flush is to remove it from the system. Magnacleanse works best for me got 1.5kg out of a 2 bed place that had been done 6 months ago ( so they say ).

 

[plumben]

Add 2x X800 into the system and run for a week then drain down and flush out each rad one at a time using mains pressure and give them all a bang with a rubber hammer,
Refill with clean water but no Inhibitor run for 2-3 weeks and drain down again to check if its clean if not add another 2 bottles


Had a job where the customer refused to have his system power flushed although his boiler made some lovely noises due to the sludge in the heat ex

Ended up using 10 bottles of X800 and drain and flushed 5 times over a 2 month period,

He still thinks he saved money by not having to replace all his rad valves as they where leaking just on mains water

 

[AWheating]

its pointless not powerflushing if the system is in a condition that warrants it. nothing gets close to the flow rates of a machine with a strong chemical cleaner.

 

[Ray Stafford]

A few years ago, I was talking to one of the boffins at well known chemical company.

He wasn't a sales type, and all he was interested in was the science. He didnt even claim that his company's chemicals were better than the competition. What he told me was that to clean a system you needed:

1) The right concentration of the proper chemical
2) The right temperature - hot = better
3) A long period of time because the chemical reactions are relatively slow. He was talking about days and weeks, not hours.
4) Some kind of forced circulation. This could be a powerflush or a garden hose/hammer

 

[AWheating]

like washing up liquid

it works
it works better with hot water
it works even better if left to soak in the bowl
it works even better when rinsed with fully open cold tap