DIY venturi

[showjyr]

I made venturi tonight and it blows the stock one out of the water.....lower flow rate an twice the bubbles. After 4 days the old one was barely building up any foam.....about 15 minutes after I put this venturi on the foam was almost t the top of the riser tube...awesome!

I took a 1" piece of 1" PVC and placed a piece of 1/8" acrylic on top of it. After a few seconds of blasting it with a heat gun I took the chuck end of a 1/2" drill bit and stretched the acrylic the length of the PVC. I then tapped it and threaded my air stem in and glued another 3/4" piece of PVC on the other side of the acrylic. To finish i just cut my chunk of 3/4" PVC to the ricght length, shaved it down a bit and glued it on......bam, an easy, and effective venturi!

Old one on the right

Pump side

Quick vid of it in action

 

[Killerdrgn]

how loud is it, I made one myself and it got really loud.

 

[showjyr]

Compared to my return pump and drain line it's not even noticeable and it's just an open ended tube with no silencer.

 

[fernandokng]

What pump was this on?

 

[showjyr]

I'm running it on a ASM G-2 with a mesh modded Sedra 3500 and the recirc mod.