Multi Stage DI Life Estimator ppm × gallons

Estimate how many gallons your DI cartridge will produce before exhaustion, and the runtime at your flow rate.

Inputs

Feed TDS (ppm)

RO Rejection (%)

Post-RO to DI (ppm)

Auto-computed from feed & rejection; override for single-stage DI (set this to feed TDS or set rejection to 0%).

System Flow (GPM)

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Booster Pump ON

RO feed pressure at membranes (PSI)

Typical: ON = 110–150 PSI • OFF = 40–70 PSI

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DI Cartridge Size 4″×21″ (~0.153 ft³) 4.5″×20″ Big Blue (~0.145 ft³) 4″×10″ (~0.052 ft³) 4.5″×10″ (~0.06 ft³) 4″×30″ (~0.218 ft³) FRP half Cubic FRP full Cubic Custom…

Custom DI volume (liters)

CO₂ / Conservatism (ignored) Constant K = 160740

Endpoint strictness (ignored) 1.0

Preset: Wall Mount (dual 4021) Preset: Max Output (dual 4040 ULRO) Preset: Rival (single 4040 VF + 4×10″ DI) Preset: H2Pro (4040 VF + 30″ DI) Preset: 4060 (dual 4×30) Preset: PWP 1 RO (single 4040 + 4×10″ DI) Preset: PWP 2 RO (dual 4×40 + 4×10″ DI) Preset: Fill & Go (4040 + 4″×10″ DI) Preset: Phantom (single 4040 + 4×10″ DI)

Results

Gallons before DI exhaustion

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Capacity basis: — gal/ft³

Run time at your flow

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hh:mm shown below

hh:mm (at GPM)

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Flow: — GPM

Image coming soon.