CSM Tap Water RO elements are ideal for tap water and for treating small quantities of water.
Model Flow Rate
(GPD,m3/d)
Salt Rejection(%) Diameter/
Length (inch)
Test Conditions Spec Sheet
RE4021-TE 1,050 (4.0) 99.5 4.0 / 21 21" BW Standard
RE2540-TE 800 (3.0) 99.5 2.5 / 40 40" BW Standard
RE2521-TE 300 (1.1) 99.5 2.5 / 21 21" BW Standard
40" BW Standard test conditions: NaCl 2,000 mg/L, Pressure 225 psig, Temperature 25°C, pH 6.5-7.0 Recovery 15%
21" BW Standard test conditions: NaCl 1,500 mg/L, Pressure 150 psig, Temperature 25°C, pH 6.5-7.0 Recovery 8%
Model Flow Rate
(GPD,m3/d)
Salt Rejection(%) Diameter/
Length (inch)
Test Conditions Spec Sheet
RE4021-TLF 1,050 (4.0) 99.2 4.0 / 21 21" BW Standard
RE4021-TL 1,050 (4.0) 99.2 4.0 / 21 21" BW Standard
RE2540-TL 850 (3.2) 99.2 2.5 / 40 40" BW Standard
RE2521-TLF 350 (1.3) 99.2 2.5 / 21 21" BW Standard
RE2521-TL 300 (1.1) 99.2 2.5 / 21 21" BW Standard
40" LP Standard test conditions: NaCl 2,000 mg/L, Pressure 225 psig, Temperature 25°C, pH 6.5-7.0 Recovery 15%
21" LP Standard test conditions: NaCl 1,500 mg/L, Pressure 150 psig, Temperature 25°C, pH 6.5-7.0 Recovery 8%
* These models are tested and certified by NSF to NSF/ANSI standard 61