I used to use a 48qt Ice Cube for a mash tun.
This is how I rigged it up.
The valve is a PVC ˝ threaded.
The fittings are ˝ x ⅜.
I just reversed the drain fitting in the Ice Cube.
No glue or sealers used just push the barbed end
Into the drain.
I just put about 1 inch of hose in the braid.
Then shove it into the drain fitting.
I just used the fittings from the Ice Cube at first. There is
a risk of the braid coming out with this setup.
I used next to connect the braid. The bulkhead
fitting fit right in the hole in the cooler. I added an
o-ring to seal the inside. This is a Weatherhead
#1346 bulkhead fitting from John Henry Foster
and a flare to NPT fitting from the hardware store.
The bulkhead fitting on the right is also available
at McMaster-Carr #50785K274
What I learned up to this point is that not all braids are
created the same. The braid I was using was made
from thin gauge wire 0.008 in diameter and was
rather wimpy and limp. I would catch it in my spoon
and stretch it out. Then I had problems with compacted
grain beds (stuck mash).
I drilled 3/32 holes in the bottom about 3/8
to ˝ apart. I use a copper 3/8 NPT to ˝ socket
adapter to connect the CPVC to the bulkhead fitting.
The fittings are just pushed together not glued.
I used a ˝ copper sweat to ˝ MPT adapter to connect
the manifold to the bulkhead fitting. Rigid copper pipe and
CPVC have the same OD so the CPVC fits snugly into
the adapter. By lifting up the opposite end I can remove it
without any tools for cleaning.