Heater water pipes

Been doing a bit of prep on the car while waiting on some parts to comes
Noticed the the sliver heater pipes look abit rough has anyone replaced these before if so what’s involved

If you mean the alloy ones that run from front to rear, then I doubt anyone has replaced them, as they are pretty much numbers 1 and 2 fitted to the chassis. To replace them, you would need to take off both sills, probably the screen surround and loads of other bits.
On the upside, have never seen one leak.

That’s the ones

They are not leaking just the connection tomtjem looks rough, just was wondering if anyone has changed them but sounds like a nightmare job