Bathroom Question - Pip to sink question

[jeremy2015]

Greetings,
When cleaning the bathroom, I came across the following.
Some blue/green colour on the pipe and some oxidisation on the bathroom pipe that flow the water to the tap. (Flexible pipe show sign of oxidisation - do I need to be concern?)
No leaks so far.
Pictures would make more sense hopefully.

Any specifics concerns on these?

Thanks
Jeremy

 

[dilalio]

Ballofix isolator valves (the fittings with the screwdriver slot) are notorious for weeping (especially when they are manipulated).

Or it could just be splashing from basin use traveling down the hot and cold pipes and sitting on the fittings where it starts to oxidise.

Dry everything off with paper towel and then run the taps and feel of any moisture returns to the fittings - checking that it’s not splashing out around the basin.

 

[pete50]

On the other hand it could just be condensation. That is the cold side and it is in a bathroom. Condensation from when you bathe or shower could be condensing on that fitting causing the corrosion. As said dry it all off and then see if it weeps. They do weep from the screwdriver slot and the nuts.