Flow-Rate Database
Why flow rate matters: an undersized system drops your shower pressure every time two taps run at once. Match the system’s service flow to your home’s peak demand (roughly 6–12 GPM for most homes), not just the headline peak number. Manufacturers often publish only one of the two, where only a peak figure exists, treat it as the ceiling, not the working flow.
| System | Service flow (GPM) | Peak flow (GPM) | Tank size (in) | Port size | Pressure drop |
|---|---|---|---|---|---|
| 3M Aqua-Pure AP902 |
20 | 20 | — | 1 inch NPT | — Documented |
| 3M Aqua-Pure AP903 |
10 | 20 | — | 1 inch FNPT | — Documented |
| 3M Aqua-Pure AP904 |
20 | 20 | — | 1 inch NPT | 4 Documented |
| APEC CB1-CAB20-BB |
4 | — | — | 1 inch FPT | 0.90 psi @ 4 gpm (FI-CAB20-BB cartridge) Documented |
| APEC CB1-SED20-BB |
10 | — | — | 1 inch FPT | <1 psi @ 10 gpm (FI-SED20-BB cartridge) Documented |
| APEC CB3-SED-KDF-CAB20-BB |
4 | — | — | 1 inch FPT | stage 1 <1 psi @ 10 gpm; stage 2 0.90 psi @ 4 gpm; stage 3 0.90 psi @ 4 gpm Documented |
| Aquasana Rhino EQ-1000 |
7.0 | 14.6 | — | — | — Documented |
| Aquasana Rhino EQ-1000-AST (whole-house filter + SimplySoft salt-free conditioner, no UV) |
7.0 | 14.6 | 8×46 filter tank + SimplySoft conditioner tank | 3/4 or 1 inch | — Documented |
| Aquasana Rhino EQ-1000-AST-UV (whole-house filter + SimplySoft + UV purifier) |
7.0 | 14.6 | 8×46 filter tank + SimplySoft conditioner tank + UV chamber | 3/4 or 1 inch | — Documented |
| Aquasana Rhino EQ-WELL-UV-PRO-AST (well-water filter + SimplySoft + UV purifier) |
7.0 | 14.7 | — | — | — Documented |
| GE GXWH60T |
4.0 | 15.0 | — | 1 inch NPT | — Documented |
| GE GXWH70M |
4.0 | 12.0 | — | 3/4 inch push-to-connect (1 inch adapter sold separately) | — Documented |
| Home Master HMF2SMGCC |
10 | — | — | 1 inch NPT | — Documented |
| Home Master (Perfect Water Technologies) HMF2SmgRFCC |
20 | — | — | 1 inch NPT | 1 Documented |
| Home Master HMF3SDGFEC |
15 | — | — | 1 inch | <1 psi (third-party review, not manufacturer) Documented |
| iSpring WDS150K |
— | 15 | — | 1 inch NPT | — Documented |
| iSpring WF150K |
15 | 26 | — | 3/4 inch NPT | — Documented |
| iSpring WGB12B |
— | 15 | — | 1 inch NPT | 5 PSI at 5 GPM Documented |
| iSpring WGB22B |
— | 15 | — | 1 inch NPT | — Documented |
| iSpring WGB32B |
15 | 15 | — | 1 inch NPT | — Documented |
| iSpring WGB32B-PB |
— | 15 | — | 1 inch NPT | — Documented |
| iSpring WGB32BM |
— | 15 | — | 1 inch NPT | — Documented |
| Kind Water E-1000 |
15 | 15 | — | 1 inch FNPT | — Documented |
| Kind Water E-2000 |
15 | 15 | — | 1 inch | — Documented |
| Kind Water E-3000 |
15 | — | — | 1 inch | — Documented |
| Kind Water E-3000UV |
15 | 15 | — | 1 inch NPT | — Documented |
| Kind Water WS-6000 |
12 | 12 | — | 1 inch MNPT | — Documented |
| Pelican (Pentair) PC1000 |
12 | 16 | 11 inch diameter (exact dimensions not published) | 1 inch | 13 PSI at 12 GPM Documented |
| Pelican (Pentair) PC600 |
8 | 12 | 9×48 | 1 inch | 13 Documented |
| Pelican (Pentair) PSE1800 |
8 | 12 | — | 1 inch | — Documented |
| Pelican (Pentair) PSE2000 |
12 | 16 | — | 1 inch | — Documented |
| Pelican (Pentair) WF10-P |
— | 15 | — | 1 inch | — Documented |
| SpringWell CF+ Whole House Water Filter (7+ bathrooms, 20 GPM) |
20.0 | — | 13×54 | 1.5 inch | — Estimated |
| SpringWell CF1 |
9 | — | 9×48 | 1 inch | — Documented |
| SpringWell CF4 |
11 | — | 10×54 | 1 inch | — Documented |
| SpringWell CSF1 Water Filter + FutureSoft Salt-Free Combo (city water, 1–3 bathrooms) |
9 | — | 9×48 (52 with head, filter tank) | — | — Estimated |
| SpringWell CSF4 |
11 | — | 10×54 (filter tank) + 9×48 (conditioner tank) | 1 inch NPT | — Estimated |
| SpringWell FS1 FutureSoft Salt-Free Water Conditioner (1–3 bathrooms) |
12 | — | 6×35 (39 with head) | 1 inch | — Documented |
| SpringWell FS4 FutureSoft Salt-Free Water Conditioner (4–6 bathrooms) |
15 | — | 9×48 (52 with head) | 1 inch | — Documented |
| SpringWell SS1 (32,000-grain salt-based softener) |
11 | — | 9×48 | 1 inch | — Documented |
| SpringWell SS4 Salt-Based Water Softener (4-6 bathrooms, 48,000 grain) |
13.0 | — | 10×54 (63 with head) | 1 inch | — Documented |
| SpringWell WS1 Well Water Filter (1–3 bathrooms) |
12 | — | 10×54 (64 with head) | 3/4 inch MNPT | — Documented |
| SpringWell WS4 Well Water Filter (4–6 bathrooms) |
18 | — | 13×54 (64 with head) | 3/4 inch MNPT | — Documented |
| US Water Systems Bodyguard Whole House Filtration + GreenWave Salt-Free Softener Alternative System |
20 | 25 | — | 1 inch | — Documented |
| US Water Systems Defender Whole House Reverse Osmosis System |
2.78 | 9.0 | — | 1 inch FNPT | — Documented |
| US Water Systems Matrixx Smart Whole House Backwashing Catalytic Carbon Filter (081-MXF-CX-200) |
15 | 15 | 12×52 | — | — Documented |
| US Water Systems Matrixx InFusion Iron and Sulfur Removal System |
15 | 15 | 12×52 | — | — Documented |
| US Water Systems Matrixx Smart Metered Water Softener (MXX-100 / MXX-150 / MXX-200) |
— | 27 | 12×52 | 1 inch | — Documented |
| Whirlpool WHELJ1 |
6.0 | 9.6 | — | 1 inch (connects to 1-inch copper, PEX, CPVC) | 10 Documented |
Data notes
- Flow figures in GPM. “Service” is the rated continuous working flow; “peak” is the maximum the manufacturer rates.
- Pressure-drop figures are rarely published, most rows have none, which is the manufacturer’s omission, not ours.
- Cartridge-based systems have no tank; softener grain capacities and max hardness are in the row data where published.
- One conflict flagged: retailer tables list the SpringWell CF4 at 12 GPM while SpringWell’s own spec sheet says 11 GPM, we use the manufacturer figure.
- No hands-on testing. Figures come from manufacturer spec sheets, manuals, and published retailer spec tables.