LAB TEST RESULTS

Third-Party Test Reports

You deserve to know what your shower filter is doing for you. All of our Weddell Duo filters have been NSF certified and independently tested by accredited laboratories. We proudly share our lab test reports, showcasing our commitment to transparency and trust. See how our filters excel in reducing contaminants, ensuring your shower experience is always clean and filtered.

Performance Data for Weddell Duo Shower Filter

Shower Filter Image

Product Type

Activated Carbon Block Shower Filter

Replacement Element

WD-100F

Rated Capacity

8,000 gallons

Operating Pressure Range

28-125 PSI

Operating Temperature Range

34-120°F (1-49°C)

Rated Flow

2.8 gpm

Contaminants

While the Weddell Duo Shower Filter effectively reduces many contaminants beyond those listed, we only publish reduction claims for contaminants tested according to established industry standards. Testing is extensive and costly, so we prioritize the most common problematic contaminants. We are continuously testing based on interest in specific contaminants, and results will be updated accordingly.

Weddell Duo was certified by NSF International to NSF/ANSI 177 and NSF/ANSI/CAN 372 standards in 2023.

NSF/ANSI 177 Test Completed Minimum Reduction Maximum Reduction Results
Chlorine Reduction, Free Available 11/21/2023 ≥87% ≥99% Pass

Data Analysis Table

Sample Point Inf. Average (mg/L) Average (mg/L) Eff. % Reduction (%) Avg. % Reduction (%)
Effluent 1 Effluent 2 Effluent 1 Effluent 2
3,200 gallons (40% capacity) 2.1 0.08 0.08 91.0 93.0 96.4
4,000 gallons (50% capacity) 2.0 0.09 0.09 92.2 95.0 96.0
4,800 gallons (60% capacity) 2.0 0.10 0.10 92.9 97.6 95.9
5,600 gallons (70% capacity) 2.0 0.14 0.14 76.3 77.4 93.6
6,400 gallons (80% capacity) 2.0 0.19 0.19 72.0 72.5 91.3
7,200 gallons (90% capacity) 2.0 0.22 0.22 73.7 75.8 89.7
8,000 gallons (100% capacity) 2.0 0.28 0.28 57.0 64.0 67.0

Weddell Duo was verified by accredited IAPMO R&T LAB to NSF/ANSI 53 standard in 2023.

Note: During testing, the flow rate was increased to 2.8 gpm, making the test more challenging to pass as the NSF/ANSI 53 standard is designed for drinking water, which has a lower flow rate.

NSF/ANSI 53 Test Completed Minimum Reduction Maximum Reduction Results
PFAS Reduction 09/23/2023 ≥99.05% ≤99.99% Pass

Total PFAS Data Summary Table Filter 1

Sample Point Accumulated Volume Effluent 1 Influent 1 PFAS (µg/L) Effluent 1 PFAS Concentration (µg/L) Passing Criteria
10 UV 10 UV 0.17 0.01 Passed
50% 1,200 gallons 0.10 0.02 Passed
100% 2,500 gallons 0.15 0.01 Passed
150% 3,750 gallons 0.17 0.01 Passed
180% 4500 gallons 2.19 ≤0.01 Passed
200% 5,000 gallons 0.17 0.01 Passed

Total PFAS Data Summary Table Filter 2

Sample Point Accumulated Volume Effluent 2 Influent 2 PFAS (µg/L) Effluent 2 PFAS Concentration (µg/L) Passing Criteria
10 UV 10 UV 0.17 0.01 Passed
50% 1,200 gallons 0.10 0.01 Passed
100% 2,500 gallons 0.15 0.01 Passed
150% 3,750 gallons 0.17 0.01 Passed
180% 4500 gallons 2.19 ≤0.01 Passed
200% 5,000 gallons 0.17 0.01 Passed

Weddell Duo was verified by accredited IAPMO R&T LAB to NSF/ANSI 42 standard in 2023.

Note: During testing, the samples were evaluated for Nominal Particulate reduction as a Class IV according to NSF/ANSI 42 section 7.4.1. The flow rate was increased to 2.0 gpm, making the test more challenging to pass as the NSF/ANSI 42 standard is designed for drinking water, which has a lower flow rate.

NSF/ANSI 42 Test Completed Minimum Reduction Maximum Reduction Results
Particulate Reduction 11/28/2023 ≥96.59% ≤99.66% Pass

Average Influent and Effluent Particle Counts (Sizes 15-30 µm)

Sample Point INF (Particles/mL) E1 (Particles/mL) E2 (Particles/mL) % reduction E1 % reduction E2
2-UV 11,733 133 400 98.86% 96.59%
Cycle 4 21,867 67 533 99.70% 97.56%
50% Flow 19,400 0 67 100.00% 99.66%