Maxblue U8-ST Under Sink Water Filter System

Regular price $69.99
Sale price $69.99 Regular price
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Shipping policy

Shipping rates and delivery estimates

Shipping Method

Estimated Delivery Time


Economy Shipping

4-10 Business Days


Standard Shipping

3-6 Business Days

$5.99(Free on order over $200)

Express Shipping

2-5 Business Days


* Shipping charges for your order will be calculated and displayed at checkout.

* The Delivery Time is calculated based on the shipping date, not the order date. The actual shipping date can be delayed due to invalid shipping address, weekends/holidays, etc.

Handling Time:

We need 24h to 48h to prepare your order, most of the packages will be shipped out within 24 hours except weekends and holidays.

Track your order

Once your order is shipped, you will receive an email from us containing the tracking information. Tracking information is also available in your "Order Details" page.

Shipping areas

The products can be delivered to the most of states in United States except American Samoa, Micronesia, Guam, Marshall Islands, Northern Mariana Islands, Palau, Puerto Rico and U.S. Virgin Islands.

International shipping

We are sorry that the international shipping service is not supported for the time being.

Shipping Carriers

We work with 4 carriers to make sure your order will arrive on time: UPS, USPS, FedEx and Amazon Logistics US.

Delivery Time Exceeded

Shipping might experience delay due to covid-19. If your order is delayed, please contact us via email, we will check the situation with the transportation company in time. Thanks for your understanding and support.

Note: We don't accept requests to specify a certain carrier to deliver the package.

Shipping origin

The package will be shipped from one of our US warehouses closest to your location.

* If you have any questions, you can contact our customer via LiveChat or email to, we will reply to you as soon as possible!

Sales Tax

The sales tax will be collected in accordance with U.S. tax laws. Customers whose delivery address within the following states will be charged a certain tax at checkout, and the tax rate is determined by the local government. (AZ, CA, CO, FL, GA, IL, IN, KY, MA, MD, MI, MN, NC, NJ, NV, NY, OH, PA, TX, UT, VA, WA, WI) All taxes collected will be reported and filed to the IRS on time.

30-Day Return ×
No Worries Guarantee

Thanks for shopping at Waterdrop. We appreciate the fact that you like to buy the stuff we build. We also want to make sure you have a rewarding experience while you're exploring, evaluating, and purchasing our products.


If you wish to cancel an order, please contact our customer service team

If you contact us within 24 hours of purchase:

We can cancel the order for you at no additional cost. The cancellation may take up to 3 days, thank you for your patience and understanding.

If the package is already shipped, we will issue a prepaid label and return your payment after we have received the package from you.

If you contact us after 24 hours of purchase:

You need to bear the return fee if the package is already shipped (depends on our system, not the order status).

The product has to be damage-free, packed in the packaging we sent to you, and with the original receipt of the purchase.

We will return your payment after we have received the package from you.

There are times when we may not have the product(s) that you choose in-stock or may face some issues with our inventory and quality check. In such cases, we may have to cancel your order. You will be intimated about it in advance so that you do not have to worry unnecessarily about your order.

Return Policy

We accept return reasons including defective, no longer needed, change mind, not as described, etc.

If you want to return the item without any quality issue, you need to bear the return fee yourself and pay 20% of the original order as a restocking fee. We will cover the return postage for return requests regarding quality issue.

Once you received a damaged / incorrect item and you want to file a claim, please email

together with your order information and the picture of the damaged / incorrect product. We are eager to help.

If you would like to return a product, please follow the next guidelines:

Step 1: contact the customer service team before return a product, we will reply you with return tips within 24 hours.

How to contact:


Toll-free Tel: (888)-352-3558

Step 2: prepare package after you get confirmation from customer service team, please be noted the following requirements:

• The order number needs to be included in the package. You can print out the order detail page or leave a note in the package.

• The package needs to come back with the original receipt of the purchase.

• The product has to be in the packaging we sent in the first place.

• The product has to be damage-free (not applicable for defective products), damage on the product will void the refund.

Step 3: Please contact our customer service and send your return tracking number. We will track the package, and refund your money within 5 working days after we receive and check the package .

Return Window

We offer a 30-day return guarantee. Warranty will begin from the date the product is received. If a product grows defective during the warranty period due to a quality issue rather than your own breakage or misuse, we can accept a return, provide free repair service, or issue a new replacement.

Return address:

Ecolife Technologies, Inc.

17910 Ajax Circle

City of Industry, CA 91748

United States

Tel: 888-352-3558

Refund Policy

After receiving your request or your packages, it may take up 1-7 business days to refund your money. (Unfortunately, due to current situations and the COVID-19, your refund may require an additional 3-5 days to process. Thank you for your patience and understanding.)

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Operating temperature
5-38℃/ 41-100℉
Working pressure
14-87 psi (1-6 bar)
Flow rate
1.32 gpm/ 5 Ipm
Filter capacity
up to 8000 gallons/ 30280 liters (for chlorine reduction)
Feed water requirement
municipal tap water
Waterdrop under counter single stage water filter adopts a compact design while providing you with an outstanding water filtration experience. The ultimate aim is to improve the quality of your tap water using advanced filtration technology. The system uses PP cotton and activated carbon to reduce impurities in your tap water, including rust, heavy metals, sediment, chlorine, taste, and odor. It also ensures the safety of the filtered water, thanks to a 100% safe, recyclable housing, which makes the filter free of harmful heavy metals like chromium, polybrominated diphenyl ethers, polybrominated biphenyls, cadmium, mercury, and lead.
Unlike other under sink water filtration systems in the market, this Waterdrop under cabinet water filter can enlarge its filter area to deliver a superior filtration performance. The water inlet and outlet are also larger than usual to ensure a smooth, stable, and fast water flow of up to 1.3 gpm.
Get this Waterdrop water filter for sink to guarantee safe, healthy, and clean drinking water for you and your family at all times.

What is the difference between U8-ST and U8-FC?

While you can connect WD-U8-ST directly to your original kitchen faucet without drilling a hole on your countertop, WD-U8-FC is designed to use our exclusive stainless-steel faucet, which requires drilling a hole on your countertop.

What are the differences between U8-ST / U8-FC and WD-UA / UB?

Our U8-ST/U8-FC under sink water filtration system functions by enlarging the filter area to provide an improved overall filtration performance. The filtration is more intensive as the water passes through the filter for longer. So, the filtered water is well-filtered with a much better taste. Also, U8-ST/U8-FC have larger outlet and inlet sizes than the WD-UA/UB, which translates to a faster and more consistent water flow.

How to install this under counter single stage water filter?

It is a simple DIY installation. Start by connecting the red tubing to the cold water source and red filter inlet. The next step is to connect the blue tubing to the blue filter outlet and faucet inlet. You can be done in less than 3 minutes and start using your system without any external help from a plumber.

How to replace the filter for this under sink water filtration system?

Once you twist the old filter, you can remove it and install the new filter with another twist. However, you should turn off the water valve before replacing the filter.

How long is the service life of this single stage filter?

You can get up to 8,000 gallons of water, although the exact amount depends on the local water requirement. We advise that you do a filter replacement once the filtered water comes with an unusual taste.

What contaminants can this under counter water purifier reduce?

This filter system is effective against chlorine, odor, large particles, heavy metals, and other impurities in your tap water.

What are the pros of this single stage water filtration system?

The filter combination in this Waterdrop under counter single stage water filter includes PP cotton and premium carbon, which ensures an effective reduction of heavy metals, large particles, odor, and chlorine. The somewhat larger filter size also guarantees a more effective filtration. The housing material adopted is 100% safe, with no content of heavy metals. You also get up to 8,000 gallons of filtered water over time, at a flow rate of 1.3 gpm. Waterdrop is here to deliver an optimized filtration experience!

What filtration materials does this under cabinet water filter use?

The filtration materials here include PP cotton and premium activated carbon, which helps improve water taste and reduce contaminants.

Can Waterdrop undersink water filter be recycled?

Yes, they can. We have adopted only 100% recyclable and eco-friendly materials in this system. Our choice of heavy metal-free housing ensures harmful metals like chromium, polybrominated diphenyl ethers, polybrominated biphenyls, cadmium, mercury, and lead do not contaminate the environment when the old filter is discarded.
Powerful Filtration
Waterdrop under counter single stage water filter efficiently reduces chlorine, odor, taste, heavy metals, particles, sediments, and more in tap water. Overall, your drinking water tastes better and crispier.
Two Available Options
You can connect option A directly to your original kitchen faucet, removing the need to drill a hole.
Option B comes with an exclusive stainless-steel faucet that requires drilling a hole.
Both options provide you with excellent filtration experience with stable and fast water flow, allowing your household to enjoy fresh and pure water.
Larger Filter Area
We made the diameter and length of the undersink water filter wider and longer to create an enlarged filtration area. This means you get a higher filtration capacity and longer life.
Trustworthy Materials
The Waterdrop water filter for sink contains no harmful heavy metals, such as lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and more. It adopts only eco-friendly materials; hence, you can rest assured of drinking safe water with no health risks.
Versatile Applications With Single Filter
The under counter water purifier satisfies your family's multiple water needs for the whole day, including drinking water, cleaning, cooking, and feeding pets. Now you can enjoy optimal purification at all times.