I have lots of temporary internal pipework all hep2o
Removing some of it will be a PITA so I'd rather leave it in place so some plumber long after I'm dead finds it and says WTF!
One long run - goes to the temp kitchen. I can't easily get to the tee to cap it off ( once new kitchen is functional ) does it matter if there's a few 'dead legs' that are maybe 3 metres or so long?
Appreciate that a hot water tap may need a few more seconds maybe to flow hot.
No issue other than that?