Ordered 3 stage water filter (A-3, I think). Test water ppm pencil, 220 ppm in / 220 ppm out. Returned & charge 20% restock fee. Had to pay for return shipping. Free shipping at purchase was rescinded, and charged 100 baht for initial product shipping, deducted from refund. So cost us quite a bit to return a product that didn't do much, and took months to receive refund, only after threat of showing up at their door at main office in Krung Thep. If you simply want to take the chlorine smell / taste out of you tap, there are cheaper options.