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ESPA1-4040 — equivalent Hi-Tech RO membrane

Looking for a drop-in alternative to the Hydranautics (Nitto) ESPA1-4040? BW-34-4040-LE is the closest Hi-Tech Membranes equivalent — see how the specs line up below. The same element also replaces matching parts from 8 other manufacturers.

SpecESPA1-4040BW-34-4040-LE
Salt rejection
99.4%
99.5%Higher
Permeate flow
2,400 GPD
2,600 GPD
Test pressure
100 psi
100 psi
Element size
4″ × 40″
4" × 40"

BW-34-4040-LE also replaces these equivalents

Cross-referenced against 17 other elements across 9 manufacturers. Every entry links to its own spec comparison.

View BW-34-4040-LE specsView ES-34-4040 specsAll Hydranautics (Nitto) cross-references

Hydranautics (Nitto), DuPont (FilmTec), Toray, LG Chem (NanoH2O), Koch (Separation Solutions), Veolia (formerly SUEZ), Lanxess (LewaBrane), CSM (Toray Chemical Korea), Trisep (Microdyn-Nadir) and all model numbers shown are trademarks of their respective owners, used here for compatibility reference only. Hi-Tech Membranes is not affiliated with, endorsed by, or sponsored by any of them.