Click on the above link for a diagram
For Hung PEX Pipe (Slide Brackets, PEX Heat Transfer Plates or Staple Up Methods)
Installing PEX Tubing through the joists:
Drill (2) 1-1/2” holes in each joist as shown in Drawing A
Feed the PEX tubing through the hole (furthest from the sill plate) starting that particular loop in the last joist bay. PEX Tubing should be uncoiled off the top of the roll to avoid kinking.
The returning PEX Pipe goes through the holes closest to the sill plate.
Starting with the joist bay furthest from the manifold, grab the loop and twist 180°, then pull the PEX loop the length of the joist bay. Fasten the end of the loop in place or let it hang. Continue to work back toward the manifold (see drawing B).
This procedure applies for all three methods of attaching the PEX (Heat Transfer Plates, Hung Method and Staple Up). Please Note: Top of Slide Bracket (Hung Method) should be 1 5/8 inches below subfloor.
Foil Insulation is placed approximately 4 inches below the PEX tubing when done.