Culligan Quadra-Hull Indoor
A WQA-certified whole-house filter that is certified to reduce 3 contaminants, including PFAS.
You want every tap and shower treated — best for chlorine, sediment, and taste across the whole home.
Certified to reduce PFAS, PFOA, PFOS — the contaminants that matter most for health.
Like most carbon filters, it does not remove fluoride — only reverse osmosis does that.
What is whole-house system? A point-of-entry system installed on your main water line, treating every tap and shower in the house. Compare all filter types →
What it costs to own
| Upfront price | — |
| Replacement filter (N/A) | — |
| Estimated yearly cost (filters, ~1×/yr) | — |
| True cost per gallon | — |
Cost per gallon and yearly cost are our estimates from the rated capacity and the Amazon price. We show them only when we read the price from Amazon in the last 24 hours. The filter only works if you replace it on schedule.
What it's certified to remove
Certification is per-contaminant: the Culligan Quadra-Hull Indoor is credited only for the contaminants listed here, verified by WQA. It does not imply removal of anything not listed.
✓ Verify this certification on the official WQA listing →
Full specifications
| Certified by | WQA |
| NSF/ANSI standards | 53 — certified for health contaminants such as lead, VOCs, and cysts |
| Filter type | Whole-house system |
| Rated capacity | 158,000 gallons |
| Flow rate | 7.5 gpm |
| Replacement element | N/A |
| Installation | Point-of-entry install on the main line. Usually a plumber. |
Frequently asked
Is the Culligan Quadra-Hull Indoor NSF certified?
Yes — the Culligan Quadra-Hull Indoor is listed in the WQA certified-product database under NSF/ANSI standard 53. That means an independent body verified its claims (not just "tested to" a standard).
Does the Culligan Quadra-Hull Indoor remove pfas?
Yes. It is certified to reduce PFAS, PFOA, PFOS. Certification is per-contaminant, so it is only credited for what is on its listed claim set.
What does the Culligan Quadra-Hull Indoor remove?
It is certified to reduce 3 contaminants: PFAS, PFOA, PFOS.
How often do you replace the whole-house filter?
A whole-house filter like this is typically replaced about 1 time a year (replacement element N/A). Replace on schedule — a spent cartridge stops reducing contaminants.
Compare similar whole-house filters
Source: WQA public certification listing. Specs and certified claims are from the official listing; cost figures are our estimates. Some links are affiliate links — see our disclosure.