Product review (5 stars): Don't forget the 3rd hole.
Sometimes I believe some reviews are written to discredit a company purposely. I read one of the reviews for this product and it said that the red dye test was done and it allowed it to run into the bottom chamber. Funny,I bought the same exact one, same filters and It did not come out red but clear. This is even after having it for 6 months. Maybe the 3rd hole was not plugged with supplied rubber stopper. This is a great product and it only takes about 2 hours to filter 4 gallons. Water can been obtained in 30 mins. or less. The water taste great. Be careful with the white filters. I must have tightened the screw to much and the cap broke away from bottom of filter. I like the black ones better because there not as fragile.