Power flush problems

[masona]

.The chemical cleaner had "cleaned away" the corrosion which was on the outside/inside of this coil where it is soldered to the inside of the tank wall - allowing Boiler heater water to pass from the coil into the tank water.

Interesting,maybe next time round leave the hot water motorized valve in shut position or disconnect the cylinder coil temporary and by-pass it ????.

 

[Engineer Lane]

Masona
That should stop the chemical from entering the HW heating circuit nicely.
I only wish I had done that with my brothers system Although I guess that joint would have "gone" eventually....
paul

 

[DESPERATE DAN]

DESPERATE DAN,do you know where the powerflush machine was connected to ?[/quote]

The 'engineer' ? had to weld two new valve openings on to the inlet & outlet pipes that come out from the bottom of the boiler. As I had to go to work, I didn't see how the powerflush machine was attached. How he could run the thing for 2-3 hours if it was failing to free the blockage, lends me to ask what route the liquid was taking.

 

[ChrisR]

Dan do you know what chemical was used? It may have been DS40 - comes as a poeder, which is citric acid (ish) which is normally not a problem. So your leaks would have shown up sooner or later. I once had a pipe which looked like a length of garden sprinkler hose!