Harry K wrote:

Now you might ask yourself what's really going on he

The humid weather is resulting in "sweaty" cold water pipes in our
basement...

...***I find that the condensation only occurs on the first few feet
of pipe in from the ground*** Is it possible that conduction causes the
water in the first few feet of pipe to stay cold all the time leading
to heavy condensation while beyond that the water for the most part
has warmed up...?

Do you -really- think that water coming in at 50 degrees (IINM that is
about normal underground temp) at high velocity, at least that of an
open fixture, is going to pick up much useable heat in 10 ft?

Sure, based on the OP's description and the fact that condensation can
dramatically increase the air-to-pipe thermal conductance by a factor of
100 or more... 2 gpm is 960 Btu/h-F, so warming it 1 F takes 960 Btu/h, ie
1 pint of condensation per hour, about 3 drops per second. I can imagine
that, in continuous use, altho most usage bursts are a lot shorter.

It might make sense to change this pipe to fin-tube vs insulating it :-)

Nick