Product description

*Based on flow rates and capacity of 2025 wall mount shower filters.

Certified by NSF in 2023

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

Verified by IAPMO Lab in 2023

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

Verified by IAPMO Lab in 2023

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

How often do I need to replace Weddell Duo’s filters?

Why am I experiencing decreased water pressure after installing Weddell Duo?

1) Installation issue:

2) Filter at capacity:

Will Weddell Duo soften my water?

Why are my filters slowing down before the suggested lifespan?

3+1 Replacement Cartridges

From the brand

At Weddell Water, we believe that self-care starts with the water you use every day.

Founded in California by a team of PhD engineers, researchers, and wellness enthusiasts, our mission is simple: to make pure, safe water the

NSF certified to reduce chlorine with independently verified PFAS and particulate reduction for cleaner, healthier water.

Recognized by Good Housekeeping, Better Homes & Gardens, The Manual, and TIME for quality, innovation, and design.

From product support to installation help, our dedicated customer experience team makes every step simple and stress-free.

From NSF certifications to public test data, we back every claim with proof you can trust.

Better water, better self-care. We design products that put your health and well-being first while giving back to our community.