Hi,
Here's the sparge arm I built for my homebrew mash tun.
I made a manifold out of copper tubes and drilles small holes. The "T" in the middle of the manifold has not been soldered on the sides. so I can move it a bit/level it.
Then, a silicone tube goes to the "T" over to feed the water from the hot liquor tank and I can set it at the height I want with the clamp.
It's not the prettiest, but it works like a charm and it's very useful!
(Make sure to use food safe soldering, no lead)