First Try at a Laminar jet

I've been reading over some of the topics and I'm very happy with the information that I've found. I'm planning on putting 2 or 3 of them in a small pond so I'm thinking to go with a 4" diameter tube. I only need a distance of about 5 feet and a height of about 3 feet. I read over the thread on the Pentair one and i was thinking of trying it with stainless steel mesh the way they had done it instead of the straws. Would the mesh need to go in a cone shape? If anyone's tried the mesh I would love to hear from you, if not I'll let everyone know how it goes.

Hi there and welcome

I dont think the mesh need to be in a cone shape.
I know someone that did try mesh with a great result.

Perfect, I'll give it a shot an let you know...

just finished my first set of tests. I used a 4" ABS tube and drilled the holes in a cap. (I'll work on a brass fitting later) First I tried with the mess. I used a perforated PVC sheet as them a stainless mess, a finer stainless mess and finally a window screen. I didn't use a pump and just hooked it up to a garden hose. Work well, not great but well. The next thing I did was add another window mess. I think it did something but hard to tell. I took the two stainless mess's and the PVC and put them closer together (about 1" apart) added full length straws and the window screen. Again not a significant difference but it was the best one, so straws it is...

What I did notice was the water pressure play a factor. I have about 65 psi were I am and if I was to turn both hot and cold water one for max volume and pressure the stream started to break up, even when I turned the valve down.

Has anyone done and testing with a pressure pump vs. a volume pump?

I'll post some pictures shortly....

Sorry for a short response.. its late now

But the brass ring is the most important thing to have !
If the water output hole is bad shape the laminar flow will be a mess.

The brass ring should be RAZOR sharp, and cone with the smallest cone closest to the water stream.