CH / Boiler draindown - water colour

[Grunt]

Hi,

In a well maintained CH system what colour would one expect the water to be if it were drained?

 

[drbagiva]

It should be clear,it may have a brown or yellow tinge like tea before you add the milk,this is caused by the corrosion inhibitor.It should NOT be cloudy and red(very bad-corrosion) or black (old products of corrosion that stick to pumps,radiators etc.)If you have the latter two get the system fully flushed and treated with corrosion inhibitor.

 

[weargas]

before you add the milk

Why do you add milk to drained CH water?








Can you add sugar as well?














Twist of Lemon?

 

[drbagiva]

Yeah!
I always make tea from system water so I can taste what's wrong with it.

 

[Grunt]

Thanks drbagiva.

Grunt

 

[ChrisR]

Even the cleanest systems seem to have a bit of black at the bottom of the rads!