[A Navy Vet]

I'll look into it. But most survival, campers and even military swear by Katadyn water filters and the convenience. It's a simple pump without all the need for buckets and such, but not as cost effective. Pretty sure they meet your requirements. They are top line filters for particles, bacteria, and some viruses. Below, is just one of their products. You may want a larger unit other than the "pocket filter" for home. Still, the one below could be a good bug out filter.

"Like a fine handcrafted Swiss timepiece, the Katadyn Pocket Filter has been one of our best SELLING water filters for the past 20 YEARS and for a good reason. With simple effort, the Katadyn Pocket filter can produce up to 1 quart of safe drinking water per minute. The Katadyn Pocket Filter's SILVER IMPREGNATED element has been used by the U.S. Military Special Forces, NATO, RED CROSS, U.S. Forestry Service, and other military and relief agencies worldwide. The Katadyn Pocket Filter has long been regarded as the "BEST" portable water filter made in the world. In addition, the Katadyn Pocket Filter is by far the best constructed filter on the market and built to last a lifetime. ONLY FILTER in the WORLD that carries a LIFETIME WARRANTY!"

I purchase many of my disaster supplies from Nitro-Pak. Reasonable prices and wide selection. That's where we got our Mountain House freeze dried food at a decent price. They ship quickly and have never had a problem with them.

[Marcella]

I had four Katadyn Combi water filters. Then, when the Big Berkey came out, I got that. I gave one of the Katadyn Combis to my sister-in-law last Christmas, so now have three of those. The Big Berkey is first choice to use, with the Katadyns as backup. I always have three or more backups of everything required to sustain life.