Quoted:
You need a 10 ft joint of 4" PVC, a 90 degree bend, a 45 degree bend, and a 4" PVC pipe cap.
You'll need the cleaning fluid and the bonding fluid for PVC as well.
Glue the 90 onto the 10 ft joint, then the 45. They will eat out of the 45 opening. Drill some holes in the bottom of the 45 with a small drill bit so the rain will drain out.
Cut the other end as long as you want it, keeping in mind the longer it is, the harder it is to get up and/or fill up.
You put the corn in the that end and put the pipe cap on to keep it sealed and the varmints out of it.
I put a wire harness through the top end to haul it up a tree, then strapped it against the tree with rope or bungee cords, whatever was handy.
Or you can stand it up against the tree and strap it. But that lets the little varmints get into it big time. If you put it up at least two feet off the ground, it will keep the coons and squirrels from getting so much of it.
Fill it at the tree you put it on. The corn you spill will bring the deer to it faster.
The bad thing about these are they won't hold a full bag of corn, only about 25 to 30 lbs. And they need to be filled at least once a week, maybe more if the pressure is heavy.
You might want to camo them with some grey and black flat paint too. Break up the white.
Good Luck!
ETA - The first time we did this, I put a tripod up about 35 yards from the feeder in the trees. My son killed two deer off that set up the first year, one muzzle loader, one with a rifle.
I eventually set up an auto feeder and it worked even better.
Put a salt lick by your feeder too. Not too close, but not to far. 30 yds or so is good for us.
We've killed so many deer over a salt lick and corn feeder close together it would be hard for a lot of people to believe.
This is what I have done.
Matter of fact, I just finished another one of these this afternoon.
I use 5 ft of 4 " "straight pipe" then a 90 degree, then 2 ft of 4" (as a trough) with end cap.
The trough part I cut in half. (with holes drilled in the bottom to let water out).
Top (where fill it from) is a screw cap.
I drilled holes and and put 2 "I hooks" at the top.
These are secured with chain to the tree by rilling a Lag Bolt into the tree on the back of the tree.
Used Flat Black,Tan, Brown to camo it.
Will hold around 40-50 pounds of corn
You can get fancy and instead of just using the 1 - 90 degree, get the 3 way splitter, and then have 3 troughs