What would your answer be?

[Leo21]

Power flushed a system, spent half a day on it. Used quality chemicals and a fernox power flusher.
The customer rings me a week later complaining that when she vents the rads she still gets discoloured water.
what would your reply?
I will listen to everyone's answers, apart from AP! ;-)

 

[SimonG]

Tell her to stop faffing with the system. Nowt wrong with a bit of discolouration as long as it's not brown. Also tell her she shouls have had a filter installed at the same time.

 

[Leo21]

Black she reckons, personally I don't think any amount if power flushing gets a system anywhere near 100% clean.

 

[AlexGas]

True.

 

[PlumbBobBob]

ask to go back and check it for yourself

 

[Masood]

ask to go back and check it for yourself

Agree. Go and see for yourself. You might have to give it another go (it happens), or she might be making it up. I'd also want to know why, a week later, she's still needing to vent the rads.

 

[SimonG]

Depends on the type of rads as well. If they have the bulbous connections at the top with the air vents in then these can hold some Shi'ite that a powerflush won't remove.

 

[TBServices]

The rad vents will always be a little bit black, no amount of flushing will solve that.

 

[Rickster123]

:iagree: You'll never get it all out there is a difference between discoloured water and sludge. Go back and see it for yourself.

 

[Kev the gas]

The slightest amount of sludge will soon discolour system water.

The reason for a Powerflush is not to get drinking water quality, but to achieve a system that circulates well and is not corrosive to the metals in the system.

If she is having to vent radiators a week after the powerflush maybe there is a fault in the system or she is looking for a reason to complain.