Hi all,
I found a pin hole leak on a piece of galv. pipe that goes from my hot
water heater to the expansion tank mounted above the heater.

It looks like it would be easy to replace the pipe. My question is
whether there are any gotcha's I need to know.

Can I just turn off the cold water feed, drain a couple gallons from
the tank (so the water level is below the pipe), slowly unscrew the
expansion tank (to release any pressure), then remove and replace the
pipe?

TIA