Garden hose venturi pump
by jag, published
I designed this to mix a small amount of liquid fertilizer into a stream of water from a garden hose. I have a worm composter that produces quite a bit of liquid fertilizer and I wanted to dilute it and sprinkle it on my lawn.
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Print it out. Break out the little support cylinder in the bottom and cut out the think membrane over the hole.
Place a rubber washer in the female threaded end. Tap the vacuum port with a 1/8 NPT tap (don't force it and crack the plastic) The hole is already tapered so hopefully it shouldn't be too much work to tap it. Insert whatever 1/8" npt fitting you want into the port (JG fittings are nice)
Hook it up inline with your sprinkler or whatever.