Pond Pump Laminar Flow Splitter Adapter
by creuzerm, published
This is to take the output of a larger pond/aquarium/fountain pump and split the output into multiple smaller hoses.
The cool thing about this it tries to create a laminar flow using a series of small hexagon tubes (http://www.thingiverse.com/thing:41703) before running the water through a very gradual transition to the hoses. In theory, this will reduce the flow losses caused by turbulent flow and sudden changes in pipe diameters.
In practice, I was able to get the same amount of flow as a singular 1/4 inch tube about 25 feet long while including 2 additional 10 foot tubes with much more flow through each.
The photos are stereoscopic, it appears that you need to click into them to view them correctly.
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Laminar flow is created by running water through smooth, straight tubes much longer than across. We can approximate this by using a honeycomb feature inside 2/3rds of the adapter to clean up the water flow from the pump before reducing it down to the right hose size(s).
This is a parametric adapter. It currently only works with the same sized output hose(s) which are smaller than the pump housing hole.
This is a work in progress, as I've not tested very many variations in pump housing diameters and hose sizes and counts. If you find any issues, let me know.
Once printed, I used a small drill bit to smooth out any stringing inside the honeycomb feature.