B2B & Volume Sales — Call for Availability: 8″ membrane elements are sold business-to-business, typically by the case or in project quantities. Stock rotates quickly, so please call
+1 (408) 969-2688 or email
Sales@ForeverPure.com to confirm current availability, volume pricing, and lead time.
📄 Download the DuPont Product Datasheet (PDF)
| SKU / Model | ECO-PRO-400I |
| Product Type | Brackish Water Reverse Osmosis Element |
| Membrane Type | Thin-Film Composite (TFC) - ECO |
| Active Area | 400 ft² (37 m²) |
| Permeate Flow Rate | 11,500 GPD (43.5 m³/d) |
| Stabilized Salt Rejection | 99.7% |
| Minimum Salt Rejection | 99.5% |
| End Cap Type | iLEC™ Interlocking End Caps |
| Shipping Weight | ~44 lbs (boxed) |
| Shipping Dimensions | 10" × 44" × 10" (boxed W × L × D) |
| HS Code (Tariff) | 8421.21.0000 — water filtering/purifying apparatus |
| Warranty | 1-Year materials & workmanship; 3-Year prorated performance warranty from DuPont (commercial elements, per DuPont conditions) |
Operating Conditions
| Maximum Operating Pressure | 600 psi (41 bar) |
| Maximum Operating Temperature | 113°F (45°C) |
| Maximum Feed Flow Rate | 75 GPM (17 m³/h) |
| Maximum Pressure Drop | 15 psi (1.0 bar) |
| pH Range, Continuous Operation | 2 – 11 |
| pH Range, Short-Term Cleaning | 1 – 13 |
| Maximum Feed SDI | SDI 5 |
| Free Chlorine Tolerance | < 0.1 ppm |
Dimensions & Weight
| Element Diameter | 7.9 in (201 mm) |
| Element Length | 40.0 in (1,016 mm) |
| Weight (Dry) | 35 lb (16 kg) |
| Weight (Wet) | 42 lb (19 kg) |
Applications
- Industrial demineralization (Power Generation, Steel & Metal, Chemical & Petrochemical)
- Boiler feed water treatment
- Cooling tower make-up water
- Municipal drinking water production
- Food & beverage processing water
Key Advantages
- Low energy operation reduces operating costs
- Eco-friendly design with reduced carbon footprint
- Proven FilmTec™ quality and reliability
Test Conditions: 2,000 ppm NaCl, 150 psi (10.3 bar), 77°F (25°C), pH 8, 15% recovery
Specifications provided by DuPont Water Solutions. Contact ForeverPure for pricing and availability.
Questions? Please contact us
Frequently Asked Questions: Eco PRO-400i — Low-Energy High-Rejection with iLEC
Is the Eco PRO-400i a replacement for an older element?
No — the Eco series launched under the “ECO PRO” name from the start; there is no discontinued non-PRO predecessor. The 400i is the 400 ft²-class iLEC version of the Eco PRO family.
What makes the Eco PRO family special?
High salt rejection at low pressure: the family is rated at 150 psi test pressure (2,000 ppm NaCl) instead of the 225 psi basis of the BW30 line, delivering major pump-energy savings, with excellent silica, boron, nitrate, TOC and ammonium rejection. See the current DuPont data sheet for the 400i's exact flow and rejection figures.
What does the “i” mean?
The “i” denotes iLEC™ interlocking end caps: elements lock directly to each other instead of relying on individual couplers and extra O-rings, which reduces O-ring leak points and permeate bypass, and makes vessel loading easier.
Is it a drop-in 8-inch element?
Yes — standard 8″ × 40″ element (1.125″ permeate tube), fits any standard 8-inch pressure vessel, 600 psig maximum operating pressure. No system modifications required.
