Power flush a grant oil boiler

[tommy1712]

Been called to flush a system that's running a "exposed" grant oil boiler. It's been in place for a year. Advice please are they ok to power flush or should I bypass the boiler

 

[lame plumber]

personally, I avoid power flushing any combis with plate hexes, as they block too easily. If it is just a external system boiler then I see no reason not to rinse it out as well, seems a bit sad to be flushing a system post install though.

 

[tommy1712]

Think that's why I am there. It's not even been "commissioned" according to the customer, think she means signed off???? Well I no f all about oil so I'll just do my flush

 

[tommy1712]

If I can get to the flow and return easy enough I'll just bypass