NU Aqua Efficiency Series Tankless 800GPD Stage 1 Sediment / Carbon Block Replacement Filter

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Sale price$36.76 Regular price$45.95


The first stage of this filter is a spun polypropylene sediment filter that is designed to do the heavy lifting. Effective at removing sediment, rust and larger particles from your water which helps lengthen the lifespan of the other filter in your system.

The second stage of this filter is a carbon block filter that removes chlorine, lead, metals, arsenic, asbestos, mercury, VOC’s taste, and odor.

Lifespan: 3-6 Months

Compatible with SKUS:

  • WU-600GPD-TL

  • WU-800GPD-TL

Customer Reviews

Based on 24 reviews
Steve Dow
NU Aqua

Bought this las year when I remodeled kitchen. Works well. Water tastes great. I added the mineral filter to give the water a better taste and make sure we get minerals.


Great product

Lyle Hack
Great tasting water

Easy replacement. Crisp tasting water to enjoy

Quick, easy to replace

These filters really are easy to change, which makes the system quite user friendly. My only two suggestions would be a printed handout reminding the user how to make the change or a QR code to a handout or video. I know it was easy, but people can still be intimidated when an overflow of water might exist. Users will have bubbles from their machine for a while after the filter replacement.

Hello Scott,

Thank you for sharing your feedback with us. We highly appreciate your time and attention.

For the original order of the RO system, a manual guide has been provided, and a replacement filter guide was also included. Furthermore, we have a digital guide available, and we would be happy to send it to your email upon request.

Regarding the presence of tiny bubbles, it's a normal occurrence during the initial installation and startup to have some air in the system. This should naturally clear up over time. To ensure optimal performance, please make sure to flush the system after replacing the filters.

If you have any additional inquiries or require further assistance, please don't hesitate to reach out to us directly at 1.888.621.0460 or via email at We are here to help!


Marta Rios
Carbon filters.

Love this system works perfect for our home and gives you quality drinking water.