Trojan Waterers and Parts

Only the orifice, the small piece screwed into the back of the nipple. The trigger, spring and O-ring are the same in both. A pressure orifice has smaller holes that slow the water down, and a gravity orifice is open so the water runs freely. The orifices are interchangeable, so you can convert a nipple instead of replacing it.

Run a pressure nipple on a system between 20 and 40 psi. Run a gravity flow nipple when you are at 10 psi or less, or when you are feeding off a barrel or a standalone tank. A pressure nipple on a gravity line slows the water so far the animal cannot get a decent drink.

Figure 10 to 12 nursery pigs, about 10 growers, 8 to 10 finishers, one per sow in stalls, and 8 to 10 for group housed sows. Stay on the low end of those ranges. Flow rate and water pressure matter as much as the head count.

Bite size decides it. The Spiglet and Spiglet 07 are 5/8 inch and 3/8 inch, made for piglets and young pigs. The Model 75 and Cone Throat 75 run about 3/4 inch and suit growers, finishers and adults. The Oval Duct 85 is about 3/4 inch and the Oval Duct 95 is about 1 1/8 inch, both shaped so the pig takes the nipple straight in, which keeps the spray off the pen floor.

Yes, every Trojan water nipple is made with standard 1/2 inch threads, so the thread is never what decides which one you order.

Usually one of four things. It froze, in which case it needs replacing. It was put in with a pipe wrench and went egg shaped, which also means replacing it. Something is lodged inside, which means cleaning it out. Or your incoming pressure is too high, in which case bring it down to 30 to 40 psi.

To clean one, back the orifice out counterclockwise with a large flathead or a quarter, and go carefully because the spring is under tension. The trigger and spring come out with it. Pull the O-ring, clean everything, then drop the O-ring back down against the internal shelf, put the trigger in, then the spring, then screw the orifice back on snug without overtightening.

Pop the screen off the back of the orifice by pushing it sideways. Inside you will see a screwdriver slot. Turn it to line up with the hole size you want. They leave the factory on maximum, which is one large hole, or one large and one small depending on the model. Medium is one medium hole or two small ones, and minimum is a single small hole. Snap the screen back on when you are done.

Not as it comes. The Model 33 ships with the 393 pressure valve, which is built with small orifices for 20 to 40 psi and will not pass enough water on a gravity line. Swap in the 290 gravity valve, which has the open orifice, and it will work.

Material. The blue Model 33 and Model 13 cups are cast aluminum, and the black ones are cast iron. The Model 93 and Model 63 come in cast iron only. All of them share the same bolt hole pattern, so you can change from one to another without redrilling.

About 2 inches above the pig’s back, and you set that with the S hook on the chain in the mounting package. Hung right, the plastic swings work for any size of pig as long as the nipple in them suits the animal. Figure 8 to 12 pigs per nipple on a swing.

Yes. There is a lip welded to the bottom of the casing that holds the unit up off the floor of the tank. Use a 100 gallon tank or larger though. A 2 inch deep sheep tank is too shallow for it.

A 100 pound cylinder or larger. A grill bottle is too small, it needs filling constantly and it is far more likely to freeze up on you in hard cold. A bigger tank runs steadier.

No. The 66B is CSA certified for propane only, and modifying it voids that certification. We would not recommend it on safety grounds either.

Yes, and this one matters. The non adjusting pressure regulator in the hookup kit has to be on the gas line. Leaving it off voids the warranty and can damage the Robert Shaw control valve, which is not a cheap part to replace.