now place the board on the floor and put the pipe half
facing up.
align the pipe and board so that both are fairly straight.
now place your first screw about 2 inches from the top
edge of the pipe half.
screw through the plastic pipe and into the board
*careful not to screw into your floor*
(what do you mean "am i speaking from personal experience")
*snicker*
the next screw will go about 16" from the first.
now pull the pipe half snug so there is not any slack
between where the next screw goes.
the reason you leafe a lot of space between the screws
is so you can
rock the tube back and forth when your running your concentrates
to help
the black sand work down.
place the 3rd screw 16" from the second,and the last
screw about 2 inches from the end.