Hmm flushing an old broken boiler? Prior to new combi

[Jones82]

I'm about to fit a new boiler for a customer, usually I'd add a flushing agent to the old boiler and give it a run round and hot flush but this time the old boiler is knackered and won't hold pressure.

I've thought about isolating the old boiler and manually filling via a filling loop but I'd still have no pump to circulate the agent...

Hmm would it be ok to fit a magna clean and give it a good flush with the new boiler connected?
Not ideal but I'm stumped for other options?

 

[lame plumber]

hire a powerflushing unit for about £25, simple

 

[Jones82]

Power flushing units are that cheap to hire?? Haha and bg charge around £600?

 

[lame plumber]

always paid around £25 plus vat

 

[plumben]

I'm about to fit a new boiler for a customer, usually I'd add a flushing agent to the old boiler and give it a run round and hot flush but this time the old boiler is knackered and won't hold pressure.

I've thought about isolating the old boiler and manually filling via a filling loop but I'd still have no pump to circulate the agent...

Hmm would it be ok to fit a magna clean and give it a good flush with the new boiler connected?
Not ideal but I'm stumped for other options?

I've recently had this problem,
Flush with old boiler a good few times,
Fit new boiler, isolate at valves
Fit a mgnaclean and flush till clean as you can get it,
Then add cleaner, hot flush should be fine with magnaclean

 

[AWheating]

it all depends on the condition of the system, if bad then powerflush would be best, a magnaclean is designed to pic up small amounts of iron thats moving about and back to the boiler, it wont flush the system for you.