"No issues here. Pump worked great." - Review of MSR HyperFlow Microfilter

Backflush is not that that difficult, but I recommend that you try it at home first just to figure out so you don't have to bring the instructions with you. The only issue I had, which would probably be the same for all pumps, is keeping the inlet submerged. I ended using a spare water bottle, stuffing the inlet screen and tube into that, at using a rock to weigh it down. That worked fine.
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