Flushing system (without power flush)

[richig]

When adding a system cleaner (Sentinel X400) the instructions say to leave in, then drain which I understand but they also say to flush the system. I am not using a powerflush machine so could someone explain what this means. I took it to mean leaving the drain valve open with the cold feed to the F/E tank on so that water runs through the sytem - is this correct?

 

[Terry lambert]

Drain it, fill it, drain it and so on until you've got all of the cleaner out.

After I've drained and re filled a couple of times, I often get the system hot again and then drain again just to circulate the system.

Clean your F and E tank

 

[richig]

Thanks is there any issue with it being a combined feed vent pipe?

 

[cross thread]

what you are doing is nothing like a powerflush ,when powerflushing the tank is sealed off and the pump removed and the machine fitted in line forcing the water and cleaner through each radiator at a time alernating the direction of flow

 

[Terry lambert]

In what way?

If the boiler has an overheat stat and the manufacture allows that configuration, then no, not a problem.

Bung the cold feed so that rubbish doesn't go into your system whilst cleaning the F and E, or remove the tank, clean it and re instate

Obviously while the system is drained

 

[Terry lambert]

I took him to mean clean when he stated flush.

Obviously a powerflush is a lot more involved and requires equipment and knowledge.

What you are talking about doing is a chemical cleanse

 

[richig]

what you are doing is nothing like a powerflush ,when powerflushing the tank is sealed off and the pump removed and the machine fitted in line forcing the water and cleaner through each radiator at a time alernating the direction of flow

Yeah know its not a powerflush but the terminology on the cleaner says to flush the system instead of just drain. I understand now that flush in this case means to drain/refill a few times and heat up and drain as has been said.

I was worried about issues with combined feed vent (which is recommended by my boiler manufacturer) because I have never seen this before (previous house had separate feed and vents) and I wanted to ensure the cleaner enters the system properly.

 

[cross thread]

combined feed and vent is not a issue still gives a negative point on the system.

 

[richig]

Thanks, I just thought because having monitored the tank with the heating and hw on for a while the tank never seem to get hot or even warm so thought there was not much 'movement' through tank to let the cleaner enter the system. In my old house the fe tank used to be a little warm when hw/ch were on.

 

[Terry lambert]

You drain the system, put chemicals in and then refill ?

Or an express can/ rapid dose straight into a rad/ towel rail

 

[richig]

You drain the system, put chemicals in and then refill ?

Or an express can/ rapid dose straight into a rad/ towel rail

Great, any hints/issues with refilling a 10mm microbore system as opposed to a normal system which I have done before?

 

[Terry lambert]

http://www.screwfix.com/p/sentinel-...ml/85045#product_additional_details_container

Or similar via a rad

Microbore can come with a whole host of problems esp with carp in it