Weekend project #34223.

Today im going to build a portable transfer pump i think would come in handy, mainly for camping but anything really.  Built to the confines of a small weatherproof/impact resistant pelican case and with options for connecting to a 12v power source or using a 18v cordless power tool battery.

Here we have the pump i purchased of ebay. A Seaflow 18 LPM, 12v pump with an internal pressure sensor cut off switch, and the pelican case i had lying around the workshop.

Next was to find some suitable BSP fittings so i can easily connect typical garden hoses/attachments to the pump.

So we have the inlet up the top, inline gauze filter, through the pump, ball valve, which will also work as an on/off switch (because of the pressure switch) and back out again. The two stainless bushes are there so i can weld a bracket to them and screw to the box, eliminating any stresses from pulling on the hose etc and breaking the pump.

Next was to sort out the power from the makita cordless drill battery. I got this adaptor thing from makita which will work perfectly for connecting the battery. Just need to hack it a bit.

Inside it has a voltage regulator and 2 x 5v USB outlets. Im going to bypass that circuit board and connect directly to the battery terminals.

Here it is done, 18v power coming out of the unit and a few little mods and its secured to the lid.

Here we have the pump mounted, support things fitted  on an angle so the hoses dont have to kink, the 18v supply goes into a step down converter from 18 to 12v, it then links up to a 12v anderson plug for an external 12v supply, through a 10a blade fuse and to the pump. Job done!

Inside the compact case fits 2 x 6m hoses, a few garden tap attachments and a spray nozzle.  All packed into a small indestructible box i can just chuck in the back of the ute.

the end,