I set up two 400ft runs using 3/4" 160 psi black pipe and the rapitube straps. Looks real nice and holds firm. No wire, which is nice. Sorry I don't have the $$$$ to purchase the rapitube...yet. It costs quite a bit to convert over. I do like the time saving factors and the adjustments that can be made on your lines.
Bob- 4 x 12 Small Bros. Lightning w/raised flues-open pans
20 x 40 sugarhouse, all tubing-main line to sugarhouse
1400+- for 2011 & 100% vacuum
Polaris 500 HO w/Tatou 4s Tracks
1 Chocolate Lab from TEXAS