Just a few drops

We loose some water at unit EC 5.
Some drops coming down from the boiler, mostly that's water that is accumulated in the insulation and the cause is mostly further upwards.
The rest of the water is transforming into steam and goes out with the fluegas.
From our experience we know the leak is probably in a drainpipe inside .
So we wait for the moment the unit is not needed for some time.
Then it can cool down and we can go inside to investigate.
I look up between valves of the MP circulating system.

Here in LARGE....