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 21 reviews
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!


Dotty Murphy
Where is the remineralizer filter?

The remineralizer should have been included, with the replacement time put on all filters. Out remineralizer wasn’t replaced until 2 years after not knowing. A little disappointed that it wasnt included for those of us that have it. Would have given you 5 stars otherwise. Happy holidays

Hi Dotty,

Thank you for providing us with your feedback, and we sincerely apologize for any inconvenience.

After conducting a thorough investigation, it has been determined that the tracking number for your NU Aqua Alkaline 5 Stage Remineralization Filter Kit indicates successful delivery on 11/28/23 at 1:05 PM.

If you require further assistance or have any additional concerns, please do not hesitate to reach out to our customer service team at 1-888-621-0460 or via email at

We appreciate your understanding and look forward to resolving any issues promptly.

Best regards,

Vicki Brazzell
Too long a wait

I ordered 2 replacement filters and it took approximately 2 months to arrive

Hi Vicki,

Thank you for your feedback. We are truly sorry for the inconvenience caused by your order.

We take all feedback very seriously and will handle yours with the utmost consideration. We are committed to providing our customers with the best possible experience.

We will work with the warehouse team to prevent this from happening again.

If you have any further questions or concerns, please don't hesitate to contact our customer service team at 1-888-621-0460.

Pam Larson

I ordered a new filter and it took 6 weeks to receive it. I had to buy bottled water again. If I can’t depend on getting replacement filters in a timely manner I will have to consider another system.


We sincerely appreciate you taking the time to share your feedback. We value your input and are committed to continuously enhancing our services and ensuring customer satisfaction.

We sincerely apologize for the delay in shipping your recent order. We understand that you placed a pre-order for this item, and we regret any inconvenience this delay may have caused.

We value your business and are committed to providing you with an exceptional customer experience.

Marta Rios
Carbon filters.

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