


It never occured to me to calculate the size and quantity of holes. If i re-build i'll do that next time. But my sparge arm seems to work well enough at the moment.Ianb wrote:Congratulation M.T.F.! Seems you had a good day and soon you'll be drinking decent beer!!!
Regarding your sparging shower, you'll probably find that you got no liquid out of the center tube because you have drilled too many holes in the outer ring. When I made mine, it suprised me how few holes were required, and how small they needed to be.
Table X 15mm copper tube has an I.D. of 13.6mm, so an approximate area of 145 sq.mm. A 2.5mm diameter hole has an area of 4.91 sq.mm., so in theory if you drilled 30 holes the combined diameter of the outlet holes are more than the diameter of the feed tube.
If it worked, I'd just live with it, but if you were going to re-manufacture, get a printed circuit board drill bit of less than 1mm diameter and calculate how many holes you need.