Shower Filters · Head-to-head
AquaTru AquaTru Shower (90AT01SH01) vs Weddell Duo WD-100
Best Multi-Spray Filtered Showerhead
AquaTru AquaTru Shower (90AT01SH01)
5.8/10
$119.20 at Amazon
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The short answer
Weddell Duo WD-100 comes out ahead overall with 8.1/10 against 5.8/10 for the AquaTru AquaTru Shower (90AT01SH01). AquaTru AquaTru Shower (90AT01SH01) is stronger on flow & spray experience and install & maintenance. Weddell Duo WD-100 is stronger on verified filtration performance, filter life & running cost, health & materials, build quality & durability and value. At current verified prices, the Weddell Duo WD-100 costs about $29.22 less.
- Choose the AquaTru AquaTru Shower (90AT01SH01) if: Buyers replacing their head who want several spray modes, a 1.8 gpm CA/NY-compliant flow, and some DBP reduction, and accept weaker chlorine removal.
- Choose the Weddell Duo WD-100 if: Anyone who wants the most proven chlorine removal and is keeping their showerhead. Also works ahead of a handheld or diverter.
Scores by criterion
| Criterion | AquaTru AquaTru Shower (90AT01SH01) | Weddell Duo WD-100 |
|---|---|---|
| Verified filtration performance | 5.5Real DBP reduction in WFG's lab, but only 44% chlorine reduction. IAPMO listing unconfirmed at model level. | 9.4On NSF's 177 list, plus 100% chlorine and full DBP removal in WFG's lab test. Best in the pool. |
| Flow & spray experience | 8.0Four spray modes and 1.63 gpm measured against a 1.8 gpm rating. | 6.01.42 gpm measured (82% of baseline). Works with any showerhead or handheld. |
| Filter life & running cost | 3.5$40 every 3 months, about $160 a year, with no subscription discount. | 8.5$29.99 cartridge set every 5–6 months, about $60–72 a year. |
| Install & maintenance | 7.0Standard head swap. 30-day return window. | 6.5Tool-free inline install. Loses points for the 10% restocking fee and no returns on opened cartridges. |
| Health & materials | 6.0KDF media, so a possible zinc and copper pathway. No lead-free certification confirmed. | 8.5NSF lead-free marker. Plastic housing. Carbon block rather than KDF, so no zinc leaching. |
| Build quality & durability | 6.5No major tester complaints. Finish durability not documented. | 7.0Solid but bulky plastic housing. |
| Value | 5.0$119 plus $160 a year for mixed filtration results. | 8.5Lab-leading results for $90 plus low refill costs. |
Specifications
| Spec | AquaTru AquaTru Shower (90AT01SH01) | Weddell Duo WD-100 |
|---|---|---|
| Type | Filtered fixed showerhead | Inline filter (uses existing showerhead) |
| Certified to NSF/ANSI 177 (chlorine) | — | Yes |
| Lead-free certified (NSF/ANSI 372) | — | Yes |
| Filter media | Copper-zinc (KDF) + calcium sulfite + catalytic carbon | Sediment prefilter + activated carbon block |
| Rated cartridge capacity | 1,300 gallons | 10,000 gallons |
| Recommended cartridge life | 3 months | 6 months |
| Measured chlorine reduction (WaterFilterGuru) | 44 % | 100 % |
| Rated flow | 1.8 gpm | 2 gpm |
| Measured flow (WaterFilterGuru) | 1.63 gpm | 1.42 gpm |
| Spray settings | 4 settings | — |
| Replacement cartridge price | 40 USD | 29.99 USD |
| Housing material | — | Plastic |
AquaTru AquaTru Shower (90AT01SH01)
Pros
- Four spray modes
- Reduced three byproducts in lab testing
- 1.63 gpm measured flow
- Meets CA/NY 1.8 gpm limit
Cons
- Only 44% chlorine reduction
- Hardness rose about 19% in testing
- $40 filters every 90 days, with no subscription discount
- Not on NSF's 177 list; 30-day returns
A spray-focused head with a real byproduct result but a weak chlorine one. Choose it for the modes, not the filtration.
Full AquaTru AquaTru Shower (90AT01SH01) review →Weddell Duo WD-100
Pros
- NSF/ANSI 177 listed with a lead-free marker
- Removed 100% of chlorine and detected byproducts in WaterFilterGuru's test
- Low yearly cartridge cost
- Works with your existing head, handheld or diverter
- Recommended by multiple independent reviewers
Cons
- Slowest flow among WaterFilterGuru's top filters, at 82% of baseline
- Bulky horizontal shape
- Does not reduce chloramine or hardness
- 30-day returns carry a 10% restocking fee, and opened cartridges can't be returned
The most proven chlorine remover we found, with low running costs. Accept the bulk and slower flow, and it is the filter to buy.
Full Weddell Duo WD-100 review →Both products are part of our guide The Best Shower Filters of 2026, where you can see every pick, how we score and current prices from each retailer.