SP2
You know how much I have enjoyed meeting you and SP1........I would only have your best interests at heart.

That being said I will make the case for the gravity filter.

Perhaps I have done to much water pumping........On the trail backpacking and now canoeing. It has always been my least favorite camp chore. I require quite a bit of water ("your peeing again?" ;D ) and after a hard day to pump a few liters (enough for breakfast as well) was always a laborious task. By the time I found a place to set my stool up and then pump 2 liters with a pump that probably needed a bit of silicone on the plunger (and a new filter) I can almost assuredly expect some perspiring to occur. Add in a bag that would fall over once in a while and the expectation to have to do it again the next day all under a cloud of skeets.........well, I just didn't like it much.

Nowadays I wade out into the water with my platypus clean stream dirty water bag and scoop a bagful. The sun is shining...... a loon whistles in the background........ dragonflies are keeping the skeets at bay..........a fish jumps......a moose lifts its head from out of the water (and if I didn't know better I could of swore it winked at me)......Ahhh, life is good.

I climb up the bank and set my dirty water bag on a chest high branch.......connect the hose fitting, open the little clamp that acts as a valve and let her rip. Water is now flowing into the clean water bag. By the time the tent is up I have a nice big bag of water. Its magic I tell you  ;D

I know Preachers comment got under your skin (it's a club....welcome aboard  ;) ). But he was merely trying to point out how superior the gravity feed systems are compared to pumping. This comment may surprise you, in fact you might want to sit down  :D, but I am inclined to agree with him.

But hey........if you don't mind pumping........and you have a good system and equipment that functions well then be satisfied with it and be done. The key to happiness is to be content with what you have. (Not so sure I am the best qualified guy to give that advice about being content seeing that I am always looking at the next new and shiny thing but the statement is still true IMO)