I have got 23 liters red coloured manual Pureit. Works fine. Takes time to filter the water while passing through filters. No water bourne diseases contracted while using this filter. I am happy with it. Only Glitch is that it leaks water and I cant seem to find the source. Finally I saw that the washer present in the lower compartment is misplaced while reassembling the filter. I rectified it and no leakage. Spares are very easy to find in local market and they even offer u to change them without any additional cost. U can also do it urself, its so easy, once u get a hang of it.