On Wed, 1 Feb 2012 22:14:51 -0800, "Ray"
wrote:

I bought an old house which needs to have the water supplies replumbed (It
has the old style butyl pipe, and I am
refinishing the basement)

I intend to run 3/4" Pex from the entrance (about half way down the 40 ft
length of the house)
in about 15 feet to where most of the fixtures are located,
then right angle turn and run about 16 feet drilling thru the 2x10 joists,
then right angle and run about 6 feet to the hot water tank.
Then run the 3/4 hot water pipe back parallel to the just run cold water.

Then I would tap off with 1/2 inch pex to the various fixtures between the
joists.

Question: I would have to cross 2 five inch furnace hot air pipes when I
drill thru the joists.
Will that be a problem with pex being near or touching the furnace
pipes ?

If so what is the best way to separate them

Thanks for any info

Ray


"...Keep the Vanex PEX tubing a MINIMUM of 12” vertically and 6”
horizontally from sources of high heat such as recessed light
fixtures, gas flue vents, heating appliances, or electric motors.
Forced air heating ducts are not generally considered sources of high
heat.."

Some additional guidelines he

http://www.abouthomes.info/files/0525%206518.pdf