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Which central heating cleaner?

Discuss Which central heating cleaner? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Now that I've got my central heating system working properly (see thread '2 cold rads') should I run some cleaner through the system and if so should I use Fernox F3 or Sentinel X400?
 
X800 is decent although it foams a lot and can be a pain to get back out of the system, and if you dont it will literally eat your heat exchanger (had it a few times before speaking to the rep who said you can only leave it in for up to 4 hours without it doing that). F3 from Fernox is good stuff if you can leave it in for a few days, no issues (touch wood) with leaving it in for longer either but you need to remember to get the sludge out too so try dynamic flushing with the filling loop open and a drain cock open at the other end of the system
 
X800 is decent although it foams a lot and can be a pain to get back out of the system, and if you dont it will literally eat your heat exchanger (had it a few times before speaking to the rep who said you can only leave it in for up to 4 hours without it doing that). F3 from Fernox is good stuff if you can leave it in for a few days, no issues (touch wood) with leaving it in for longer either but you need to remember to get the sludge out too so try dynamic flushing with the filling loop open and a drain cock open at the other end of the system

the brew of x800 has been changed because it was so aggressive,agree f3 is good stuff as well
 
Thanks for the comments.

Gas man, just out of interest what part of south Wales are you in?
 
is there some type of heater you can buy to heat up the cold water in the power flush machine.
I have a power flush myself but sometimes its not possible to use boiler as heat source.
I have been looking for some type of heater that could plug into the wall and then through the whole in power flush machine
 
How about one of those "school" hot water things for the coffee?
 
I had a machine with a 7 kw immersion in it, blasted about 25 degrees into the system water in not too long at all. The downside being the customer was on a key meter for electric and within 40 mins they were out of juice! Since then I bought my powerflushing filter and I can still fire the boiler without worrying about damage to HX - DHW. If you get the right chemical like DS40/FXC2 then heat shouldnt really be an issue
 
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