I used the brass nozzles with a homemade misting system, and they don't require high pressure. They work good, have a nice mist. The mist isn't as fine as with the red nozzles, but I believe that her 1/4" tees are meant for them. The problem with the brass nozzles is that they build up minerals really fast, and there isn't really a good way to clean them. I tried everything to get a little more life out of them.. I soaked them in lime remover, used needles to clean the sprayer tip, etc. Once they are gone, they are pretty much gone. And, it doesn't take long. I was going through a misting head every couple of weeks sometimes, and I was running the system with a heavy duty inline filter. They also don't have that little screen filter that the red ones do. Those screens are the coolest thing about those heads, IMO.. you can pull them out and just rinse them when the head starts to clog, put them back, and presto, the heads work well again.