[Rogue Trader]

does anyone know what the difference (if there is any) between branded and unbrabded 40 inchers,

example , cleaningspot sell a filmtec hf4 that they say is better under lower water pressure than their unbranded hfs - it is also more expensive.

gapswater say that the best membrane for low water pressure is an hf5 - theirs is branded (though not sure which brand) and is better / produces more water at a lower pressure than an hf4.

im confused 

can anyone shed any light on this matter?

[traps7]

Isn't it something to do with the relationship between quantity and quality?

Not sure exactly but I'd go with Gaps Water personally.

[Lee GLS]

I have a filmtec 4040 and I'm happy with it, it bring my tap tds from 375 to 10 which seems pretty good to me, unfortunately I have had nothing else to compare it to so I don't know what the hf5 is like

[Nameless Drudge]

I`ve got  a hf5 ultratec membrane,housing and membrane from ionics at £300 plus vat(think this is cheapest anywhere),its producing 006-8 from appx 300 in at 42-46 psi and i am delighted with this and very glad i spent the extra on a 4040 set up as the productiom time is good or certainly seems to be and no messing with pumps.