Power flush on a system with double entry valves?

[Stu.roberts]

Anybody offer any advice if it's wise, it needs doing, but iv never attempted it on a system with those awful double entry valves. The system also has 10mm to the radiators.

 

[diamondgas]

It won't work IMO! You'll clean out the pipe work for sure but you'll not get the flow through the radiators required to remove the debris deposited there. You may also succeed in blowing the insert pipe off and into the radiator!! I'd suggest minimum requirement would be to change all the twin entries to single either end before flushing ...

 

[mountainman]

Just PF as normal, you may need to just have one radiator on at a time to increase flow velocity around radiator.
In the few systems I've done with these valves this method has worked a treat.

 

[Neilsy10]

From experience it blows the feeder pipe off inside the rad you can push the dirt into the rads but can't get it out making it a pretty pointless exercise, your best solution is to convert to single entry and do away with the twins to clear the bottoms or the rads successfully and not just moving dirt around.
Neil

 

[Stu.roberts]

Thanks for the advice guys, gunna repipe them first, not worth the risk.