Water Purification Supplies Mb-4040-Hp High Pressure RO Membrane 4.0" X 40"

The Water Purification Supplies MB-4040-HP (part no. 4040-HP-WPS) is a 4.0" x 40" high pressure spiral-wound reverse osmosis membrane element rated at 2,400 GPD with 99.5% nominal salt rejection. It is designed for higher-TDS brackish water where maximum salt rejection matters more than operating pressure. Supplied wholesale by All For Water.

Specifications & operating limits

• Nominal / minimum salt rejection: 99.5% / 99.3%
• Permeate flow: 2,400 GPD (9.1 m³/d), ±15%
• Active membrane area: 84 ft² (7.8 m²)
• Feed spacer: 34 mil
• Test conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77 °F (25 °C), 15% recovery, pH 7 – 8
• Max. operating pressure: 600 psi (41.4 bar)
• Max. feed flow: 3.6 m³/h (15.9 GPM)
• Max. operating temperature: 113 °F (45 °C)
• Max. pressure drop per element: 15 psi (1.0 bar)
• pH range: 2 – 11 continuous, 1 – 13 during cleaning
• Feed free chlorine: <0.1 mg/L
• Max. feed SDI (15 min): 5
• Dimensions: length 40" (1016 mm), diameter 3.9" (99 mm), permeate tube OD 0.75" (19 mm), tube extension 1.05" (26.7 mm)

Salt rejection should be verified after 24 – 48 hours of continuous operation; results depend on feed water quality and operating conditions. Request a quote for current wholesale pricing and volume discounts.