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[fryedaddy]

I've been thinking about replacing lines on my house.

My father in law had a plumber friend install his lines 20+ years back when the house was built.
From what I understand the lines are wrapped with the silver foil insulation and only have a
single wrap between incoming and outgoing. If I measure the temp coming into the house (20+ degrees lower than stove)
its almost the same as the temp close to the stove exiting. The penetration is roughly
3' below ground. He said he also had to dig down a few months after the install to grout
and fill the area around the pipe due to incoming water.

He is a very smart fella and said the water was entering the pipe and coming through that way.

Would it wise to install a new pipe?

[Scott7m]

Yes......   Definitely yes. 

You would be able to tell s huge difference in wood use if that's how there insulated.

You have many options, quality 3 wrap, 5 wrap, or a foam filled.

Let me know if I can help

[fryedaddy]

Scott,

Thank you, I'll start debating this with the misses and prob reinstall over the summer.

The current install is one set of lines to the water heater. Another set of lines
running into the house, through the downstairs heat exchanger to the upstairs heat
exchanger then throught the floor. The house is approx 2,600 sqft and has 1,000 sqft
of heated floor.

Would you recommend (2) lines or just going back the same way?

[Scott7m]

You could get a quality 5 wrap package that would include 4 lines all in one package, there would be 2 1" lines for your heating and 2 3/4" lines for your domestic water