Serving commercial aquatic facilities across New York State.
Neptune Benson (a Xylem brand) · Filtration
Fine filtration with far less backwash water, in a smaller footprint than sand
The Defender is a pressure-vessel regenerative media filter: water passes through a coat of perlite media held on flexible filter elements, and the media is periodically 'bumped' and re-coated rather than backwashed to drain. Perlite is loaded through a vacuum transfer unit. The result is very fine filtration, a compact vessel, and a large reduction in backwash water compared with sand filters. All Defender models are NSF/ANSI 50 listed per the manufacturer's technical data sheet.
FreyTech supplied and installed Defender filters for Ithaca College's 50-meter pool and replaced the sand filter at Fairport High School with a Defender. Neptune Benson is now a Xylem brand; contact FreyTech to confirm current availability and lead time.
Ideal facilities and conditions: Natatoriums; Municipal indoor pools; School district pools.
| Filter type | Pressure-vessel regenerative media filter using perlite; vacuum perlite transfer loadingSource: Defender Technical Data Sheet (Xylem, 2025) |
|---|---|
| Flow ranges | Standard/Reduced Height 191–2,283 gpm; Assero 59–412 gpm; Virtuo 216–1,712 gpmSource: Defender Technical Data Sheet (Xylem, 2025) |
| Listing | NSF/ANSI 50 on all modelsSource: Defender Technical Data Sheet (Xylem, 2025) |
| Warranty | Manufacturer states a 10-year warranty for Virtuo; confirm terms for other modelsSource: Xylem Defender literature |
Specifications are summarized from manufacturer literature and depend on configuration. Confirm current values with FreyTech before design.
“Commonly considered together” means the pairing is typical in practice; technical compatibility is confirmed for each project.
All resources for Defender Regenerative Media Filter · Request documents
It has a different routine: periodic media changes and a bump cycle instead of backwash. Training at start-up covers it.
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BECS's top controller: everything in BECSys5 plus automatic backwash for up to 16 filters, five mechanical relays, and UV/heater interfaces.
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Serving commercial aquatic facilities across New York State.