21. Trendy patterned pillows are flanked by water filters and paint. 22. Other types of water filters remove impurities by chemical or biological processes described below. 23. The water filter probably has margins in the mid thirties. 24. The chemicals stick to the tiny carbon particles as water filters through the plant. 25. At Ace Pump Corp ., there is a six-week wait for gravity-operated water filters . 26. Manufacturers of hand-held water filters and freeze-dried food report soaring sales from first-time customers. 27. According to newer regulations, each washing machine is equipped with a waste water filter . 28. In recent years, because of water pollution, many have resorted to using water filters . 29. *I don't think he is plugging his water filter so much as flattering himself. 30. :I recently measured my pressure after installing a reverse osmosis water filter in my kitchen.
