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Picture of How to make a Self Priming Centrifugal Pump
This is a centrifugal pump that only needs to be primed before pumping begins then it can continue on it's own.

To make this pump you will need:
-Threaded rod (driveshaft)
-Hose adaptor
-Hose/ Tubing
-Sheet of neoprene
-2x sheets of plastic 
-1x plastic disc(laser cut)
-bottle neck and bottle cap
-19x nuts and bolts
-38x washers
-3x wooden blocks(moulds to be vacuum formed)
-thin sheet of aluminium
-hot glue gun
-waterproof sealant

-epoxy resin

Step 1: Backplate

Picture of Backplate
Backplate
1) On the back plate mark out where the 3 inner components (impeller and 2 blocks) are going to go, as well as the outer shape of the pump.
2) In the centre of where the impeller will go, mark out and drill a single hole for both the inlet hose and driveshaft.
3) Attach hose adapter through the inlet hole.
 
Shujon4 years ago
Does that means without any power???
scoochmaroo4 years ago
This is great. What do you use it for?