your talking about a static system and van mount I am guessing
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Static system with 4040 hands down less hassle less wasted time, van mount 4040 hands down is quick.
now if you have a 4040 and it takes you 2 hours to fill your van after making water you need to look at your transfer pump as it is not anywhere quick enough.
I make water in my van with a 40 40, but thats by the by. I think a lot of people ,myself previously included, think there is need to produce quick. If its filling a static tank as long as it does it in 12 hours or whatever time you need it to be made inthen thats all you need really.
Yes a static system and then transfer pump to van gives you shorter filling time at van. Not sure i'd agree now that a 40 40 is superior or less hassle for filling a 1000 litre IBC after seeing the results first hand from some Merlins and 450 GPD jobbies.
To answer the OP's question......2 litres in 7 minutes is it good or bad. Depends on how fast he needs it, only he knows. From what i've read he only uses small amounts?
these are my thoughts on it:
why would you knowingly buy a system that is slower than the next apart from cost, should something happen and your water messes up with a slow filling one it will cost you a days money if not more to repoduce something that should take hours not half a day, I have had and sold a 300gpd and a merlin, I got these after I had a 4040 so I could compare the results so I could give an opinion from experience to others, these were resold on here. I still have the 4040 I also have a 4040 van mount (now unused)
4040 make water quicker, it saves me time, I dont like waiting for things that can be done quicker I can fill my 4 ibc tanks while at work works well for me, guess it is a case of each to there own,