Tag Archives: pelican case

12-18v Portable Water Pump

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.

2017-06-25 09.27.04_resultHere 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.

2017-06-25 09.37.45_resultNext was to find some suitable BSP fittings so i can easily connect typical garden hoses/attachments to the pump.

2017-06-25 10.16.05_resultSo 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.

2017-06-27 17.14.33_resultNext 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.

2017-06-27 17.26.42_resultInside 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.

2017-06-27 18.36.53_resultHere it is done, 18v power coming out of the unit and a few little mods and its secured to the lid.

2017-06-27 18.36.58_result

2017-07-21 17.05.26_resultHere 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!

2017-07-24 08.29.55_resultInside 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,