DuPont has discontinued many classic FilmTec™ reverse osmosis membranes as the line transitions to the new PRO series and consolidated 8" families. If your system was built around one of the discontinued elements below, this guide shows the drop-in replacement DuPont designates — and where a model was replaced more than once, the current model you should buy today.
Not sure which membrane fits your system? Ask our engineers →
RESIDENTIAL ELEMENTS (1812 / 50 GPD CLASS)
| Discontinued (DC) | Replacement | Buy Today |
| TW30-1812-24 | None listed — nearest current: TW30-1812-50HR | TW30-1812-50HR — request quote |
| TW30-1812-36 | None listed — nearest current: TW30-1812-50HR | TW30-1812-50HR — request quote |
| TW30-1812-50 | TW30-1812-50HR | TW30-1812-50HR — request quote |
| TW30-1812-100 | TW30-1812-100HR | TW30-1812-100HR — request quote |
2.5" & 4" COMMERCIAL ELEMENTS — THE PRO TRANSITION
8" BRACKISH & SPECIALTY ELEMENTS
| Discontinued (DC) | Replacement | Buy Today |
| BW30-365-IG / BW30-400-IG | BW30HR-440i | BW30HR-440i — request quote |
| BW30-365-FR / BW30-400-FR | BW30XFR-400/34(i) | Contact us |
| LE-400 | XFRLE-400/34i | BW30XFRLE-400/34i — request quote |
| LE-440i | HRLE-440i (also DC) → resolves to BW30HRLE-440i | BW30HRLE-440i — request quote |
| HRLE-440i | BW30HRLE-440i | BW30HRLE-440i — request quote |
| NF270-400 (nanofiltration) | NF270-400/34i | Contact us |
| NF90-400 (nanofiltration) | NF90-400/34i | Contact us |
| FORTLIFE XC-N | No direct replacement — current line: FORTLIFE XC70 GEN2/GEN3 | Contact us |
Before you swap: replacement elements are form-fit compatible but may differ slightly in flow, rejection, feed-spacer thickness, or operating pressure vs the model they replace. For multi-element arrays or critical systems, verify projections before substituting —
our engineers will run the cross-reference free.
FilmTec™ is a trademark of DuPont. Cross-reference compiled July 2026 from distributor listings and DuPont product data; subject to change as DuPont updates its portfolio.
