AquasureFortitude V2 Siliphos Whole House Filter
Adds polyphosphate scale inhibition to the V2 cartridge, at the cost of three GPM against the triple purpose.
$130
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Usability
Usability
Twenty dollars over the triple purpose cartridge buys a polyphosphate stage that inhibits scale and lays a protective film on metal surfaces downstream, which is a genuinely useful thing on hard water where a full softener is not going in. The trade is flow: 9 GPM against 12 for the plain triple purpose version, and that is a meaningful difference on a two-bathroom home running fixtures at once. Siliphos is scale sequestration, not softening, so hardness minerals stay in the water and glassware will still spot. The specification sheet marks PFAS reduction as Yes, and Aquasure's own support puts that figure at around 40 percent at best across the V2 cartridge range, which is a claim the column cannot express and the buyer should not read as protection. Service life is the same six months, and the warranty is one year rather than five. It earns its place as a softener alternative in a small home or as scale protection ahead of a water heater.
- Polyphosphate siliphos stage genuinely inhibits scale and corrosion on the fixtures downstream
- Sediment, carbon and scale inhibition in a single cartridge and housing
- Built-in pressure release valve simplifies cartridge changes
- Only twenty dollars more than the plain triple purpose cartridge
- 50,000 gallon rating with a clearly published replacement part number
- 9 GPM rated flow, three GPM below the triple purpose version at nearly the same price
- Six month service life, the shortest interval in the Fortitude range
- Scale inhibition is not softening: hardness minerals remain in the water
- PFAS marked Yes on the spec sheet while Aquasure support puts it at roughly 40 percent
- One year warranty against five years on the Fortitude tanks
- No published connection size on this model despite the V2 housings shipping with 3/4 and 1 inch fittings
The Aquasure Fortitude V2 Siliphos is a single-cartridge whole-house system combining copper-zinc infused sediment media, granular activated carbon and a polyphosphate scale-inhibiting siliphos stage. Aquasure rates it at 50,000 gallons or six months with a 25 micron rating and a maximum 9 GPM, and marks scale, sediment, chlorine, chemical and PFAS reduction as Yes on its specification sheet. The replacement cartridge is AF-SPX-25HFL.
Additional information
Specification: Aquasure Fortitude V2 Siliphos Whole House Filter
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Questions answered from our data
What does Aquasure remove?Across the 30 Aquasure systems we list, the makers claim reduction of 25 contaminants.
How much does a whole house water filter cost?The 55 whole house water filters we list run from $110 to $8,626, with a median of $1,105.
Do water filters remove PFAS?84 of the 296 systems we list claim to reduce PFAS.
Do water filters remove chlorine?217 of the 296 systems we list claim to reduce chlorine.
