Quick take
Frizzlife currently lists ASR212-400G at $69.99 with a two-year nominal replacement interval and PD400-only fit.
Correct fit
The manufacturer lists ASR212-400G as the second-stage replacement membrane for PD400.
Published service life
Frizzlife specifies a two-year nominal lifespan, with actual life depending on feed-water quality and usage.
Current price
The current manufacturer price is $69.99.
Do not substitute another ASR212 size
ASR212-500G, ASR212-600G and ASR212-800G are separate cartridges for different Frizzlife models.