Powerflushing combinatin boiler and rads

[allwright]

Does it matter weather i connect the unit to rad pipes or is it better connecting to the pump on the boiler

 

[newbie1]

rad pipes are fine that way u keep the unit outside and less chance of spills

 

[allwright]

can you de-scale secondary heat exchanger just as well using rad pipes

 

[newbie1]

what pump are you using
kamco can

 

[allwright]

im using the cf30

 

[stevetheplumber]

can you de-scale secondary heat exchanger just as well using rad pipes

depends what you mean if its the primary side yes if its the dhw side no for that you have to connect to the boiler tails
or remove it and descale seperately

 

[newbie1]

the pump connects the the flow and return on the rad and is reversible for flow so what difference would it make connecting to the tails on a combi as the tails just run to the rads anyway,,for best descale remove heat exchanger to descale or replace it

 

[allwright]

steve the plumber and newbi, what do you think about using kamco pump adapter on combination boilers

 

[stevetheplumber]

steve the plumber and newbi, what do you think about using kamco pump adapter on combination boilers

never used one so cant say

 

[newbie1]

pump adaptor is a bit of a novelty as really its better to keep the pump outside if poss just in case ..dirty black water is a pig so reduce the risk

 

[Plucky]

If you can get onto the primaries in the system its alot better. I have done a course run by Fernox on powerflushing and this was the lecturers advice. Its alot easier to keep the boiler running when connected into the primaries. A cold powerflush is useless!

As for combi's if you can get the pump adaptor in there then I say go for it. But never run the boilers integral pump as well as the powerflush pump as you dont want them pumping against each other.

 

[newbie1]

strange kamco suggest running boiler for max of 10mins

 

[Plucky]

is a bit odd. Fernox and Kamco may differ though. Dont kamco do a bolt on kit that heats the water.

 

[newbie1]

yes there is a add on they only suggest about ten mins i suppose because 70deg plus prob wont do the plactic bits much good in the long run
agree heated water is better than cold so 10mins of boiler shld get it warm enough leave the rest to the chemicals

 

[allwright]

whats the best way of flushing gravity hot water and pumped central heating systems

 

[newbie1]

with a flusher

 

[danielp]

with your teeth

 

[allwright]

danialp,i thought of using my teeth but wouldn't they get stained

 

[Plucky]

I have flushed a gravity system by connecting onto the connections at the cylinder when feed and vent go. Will flush the gravity primaries and allows pump to then pump around boiler and heating system. Dont forget to check for any non return valves.

 

[allwright]

Plucky, if i cap vent and cold feed can i flush through from rad pipes. will obviously take non return valves into account

 

[Kip]

Allwright, yes you can. If there are any motorised valves anywhere open them manually

 

[Bulldog]

Any of you guys tried the Norstrom Proflush machine? I'm buying a flusher in the next week or two and have read they are the best.

 

[Kip]

Any of you guys tried the Norstrom Proflush machine? I'm buying a flusher in the next week or two and have read they are the best.

Never heard of a Norstrom... Ones ive read specs on are the Kamco, Fernox or Sentinel...All of them seem like good solid machines, but are pricey.

 

[Bulldog]

They supply BG with powerflush machines.

Proflush - State of the art flushing equipment - Homepage

 

[Plucky]

Ive only used the Fernox and the Kamco machine, whilst the Fernox machine is easier to use I found the Kamco seemed to get the job done quicker, plus its lighter.

I believe the Kamco un its are cheaper too. So for me it would be fernox. Our company were given 5 free units by Fernox so that what we use mainly.