Best Water Purifiers

This distiller was made from materials that I had handy. The sheetmetal was folded to make a drain tray and also the main body. Marine or exterior plywood could have been used instead. The glass panel was from an old window (measures 870 x 810mm, but other sizes can be used) After folding the sheetmetal and making the two side panels, all were riveted together with pop rivets and then painted black inside and out to help absorb more heat. The joints were then sealed with silicone sealant, tested for leaks and a drain hose fitted as close to the bottom of the drain tray as possible. A 25mm hole was made in the back panel about halfway up to add tap water (could be saltwater too). The glass panel is added last and sealed with silicone sealant to prevent any water vapour escaping. For South Australian conditions, place the distiller with the glass panel facing North-West. On a warm spring day you can expect between 1 and 5 litres of production, on a summers day more.

Would that work, if i had enough water in the ice chest to completely cover the sucking part of the filter. It would be one of those external power filters. I would just hang it off the side of the ice chest.
i think i might line the sides of the ice chests with ziploc bags filled with water and little bit of air for cushion, and weights inside the bags to keep em sunk
just a 48 quart ice chest

First time traveler to Kenya and going on a religous mission.
What shots will I need?
What kind of gear should I bring? netting? water filters?
Passport information?
etc!
Any and all information or ideas, suggestions would be greatly appreciated!