When the HydroLogic Evolution RO1000 Membrane Element Needs Swapping
Creeping TDS at the outlet is how a membrane tells you it is done, and this is the element that goes back in. HydroLogic catalogues it as HGC728774, superseding the older HL 22045, at 18.625 in long by 3.125 in across. Rated output is up to 600 gallons per day per element, cutting up to 95% of total dissolved solids at 65 psi and 77 degrees. Two of them fill a complete system.
What Shortens the Life of Evolution-RO1000 Replacement Filters
Service life runs from six months to two years, a wide window because it depends on what the pre-filters upstream are letting through. Chlorine is the fast killer, and a spent carbon stage will take an element out long before its rated life. Cold feed water is the other surprise, since output drops with temperature and a winter garage reads low with nothing actually wrong.
Key Features
- Up to 600 GPD per element: Rated at the manufacturer's baseline of 65 psi, 77 degrees and 500 ppm feed water.
- Up to 95% TDS reduction: HydroLogic's published overview figure, measured across total dissolved solids rather than a single ion.
- Two elements per system: A complete Evolution-RO1000 runs a pair, so plan changes and spares in twos rather than singles.
- Direct HGC728774 fit: Slides into the existing Evolution-RO housing in place of the discontinued HL 22045 element.
- Six months to two years of service: The spread depends on pre-filter maintenance, which is the single biggest lever a grower controls here.
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer Part | HGC728774 (replaces HL 22045) |
| Element Size | 18.625 in x 3.125 in |
| Rated Production | Up to 600 GPD per element |
| TDS Reduction | Up to 95% |
| Test Conditions | 65 psi / 77 degrees F / 500 ppm |
| Service Life | 6 months to 2 years |
| Quantity Per System | 2 |
| Compatible System | Evolution-RO1000 |
| Weight | 2.28 lbs |