Reverse Osmosis Chemicals Reverse Osmosis Antiscalants CHEMPOWER – 1005 : R.O. Antiscalants CHEMPOWER – 1105 : R.O. Antiscalants Reverse Osmosis, Membrane Elements Osmonics Membrane Elements Model AG 2540 FF Membrane Elements Model AG 4021 FF Membrane Elements Model AG 4040 FF Etc. Reverse Osmosis, Membrane Elements Filmtec Membrane Elements Model BW30-2540 Membrane Elements Model BW30-4040 Membrane Elements Model BW30LE-4040Etc.