It's a plastic drum. I originally made the boom about 2 years ago and used a 15 gallon tank with an equally ancient shurflo pump. The label was so worn I couldn't read anything. All I know is that it emptied the tank in about 13 minutes. I got rid of that, but kept the boom and bought a new pump and new tips. I'm using red TeeJet fan nozzles now. They are rated for .40 gpm @ 40 psi, and .45 gpm @ 50 psi. I didn't just go out and buy the first 6 spray tips I could find. I picked the one that came the closest to my pump volume and pressure. Each one has a 50 mesh strainer. My new pump is 45 psi and 2.8 gpm, and I have 6 nozzles. So that would mean I have an extra .25 gpm in capacity to pump back into the tank for agitation, right? I'm using 3/4" tubing from the tank to the pump, and from the pump to the T fitting in the middle. The rest is 3/8". The local co-op has boom sprayers. But the treflan has to be worked into the soil within 24 hours of application. If I applied the herbicide to my field with the sprayer from the co-op, I'd probably be out there with my small disk for about 24 hours before it was all worked in. I didn't want to do that, that's why I built the sprayer.
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