- [0.01 μm Ultra Filtration Membrane] The 0.01-micron uf membrane of this ultra-filtration undersink filtration system reduces 99.99% chlorine and effectively adsorb lead, fluoride, heavy metals, VOCs, and much more. This system is not designed for TDS removal.
- [Integrated Waterway] Waterdrop ultra-filtration undersink filtration system adopts the cutting edge integrated waterway to prevent water leakage, which allows you to replace the filters without cutting off the water supply and produces prime-quality purified water with zero waste-water.
- [Smart Indicating System] Smart indicating system allows you to check water quality and working mode with a glance. The electronic indicators on the front panel will notify you when to replace the filters by changing the color.
- [Easy Installation] Waterdrop ultra-filtration undersink filtration system is an innovative, all-in-one intelligent water purification system. In just a few minutes, the ultrafiltration inline filtration system can be installed completely.
- [Model] Same as WD-TSU-B, but in a different color. to compare our undersink filtration systems.



















Shipping rates and delivery estimates
Shipping Method |
Estimated Delivery Time |
Costs |
Standard Shipping |
3-6 Business Days |
Free |
Express Shipping |
2-5 Business Days |
€5.99 |
* 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 origin
The package will be shipped from one of our DE warehouses closest to your location.
* If you have any questions, you can contact our customer via LiveChat or email to service@waterdropfilter.com, we will reply to you as soon as possible!
Shipping areas
The products can be delivered to Malta, Luxembourg, Estonia, Greece, Croatia, Latvia, Slovenia, Denmark, Slovakia, Ireland, Finland, Sweden, Portugal, Hungary, Belgium, Netherlands, Spain, Italy, France, Norway, Romania, Lithuania, Bulgaria, Czech. Rep., Poland ,Austria, Switzerland, Monaco, and Turkey.
International shipping
We are sorry that the international shipping service is not supported for the time being.
Shipping Carriers
Amazon functions as our logistics partner to ship out Waterdrop products. They will choose the carrier that they think works best for our customers.
Note: We don't accept requests to specify a certain carrier to deliver the package.
Delivery Time Exceeded
If your order is delayed, please contact us via email service@waterdropfilter.com, we will check the situation with the transportation company in time. Thanks for your understanding and support.
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.
Order Cancellations:
If you wish to cancel an order, please contact our customer service team.
1. If you contact us within 24 hours of purchase:
Since most orders ship the same day, kindly email us at contact service@waterdropfilter.com or call us at (888)-352-3558 within 24 hours of placing the order. There will be no cancellation fees for standard items canceled before shipment. If the package has already been shipped, we will provide a prepaid label for return, and once we receive the package from you, we will issue a refund.
2. If you contact us after 24 hours of purchase:
- In such cases, you will need to bear the shipping fee if the package is already shipped (subject to our system status, not the order status).
- The product must be damage-free, packed in the original packaging we sent to you, and returned with the original receipt of purchase.
- We will process your refund after receiving the package.
30-day Risk-free Return Policy:
- You may return an item within 30 days of receipt. All returned items must be disassembled and repackaged in their original condition.30 days risk-free return policy applies to all items. We do not charge a restocking fee, but the customer is responsible for the return postage. If the return request is related to a quality issue, we will cover the return postage. Please note that the 30-day risk-free return policy only applies to orders placed within the European Union.
Return after 30 Days of Receipt:
- You may still return any item after 30 days of receipt. In this case, customers are responsible for the return shipping cost. The total cost of shipping will be deducted from your refund. All returned items must be disassembled and repackaged as they were originally received. A 10% restocking fee will be applied to all returned products. However, in the event of any return requests related to a quality issue, we offer free returns or replacement with a new product.
1-year Warranty:
Enjoy peace of mind and confidence in your purchase with our 1-year warranty, backed by lifetime technical support.
If you receive a damaged item and wish to file a claim, please email service@waterdropfilter.com with your order information and a picture of the damaged or incorrect product. We are eager to assist you.
For products that become defective during the warranty period due to a quality issue, rather than your own breakage or misuse, we can accept a free return, provide free repair service, or issue a new replacement.
Exchange Policy:
1. Defective Products:
If you receive a product with quality issues or damages, please contact our customer service team within 30 days of receipt. We will provide you with a free exchange service. Please provide order information and photos of the damaged product when contacting our customer service team for better assistance.
2. Non-Quality Issues:
If you wish to exchange a product for non-quality-related reasons, please note the following:
- The product must be within 30 days of purchase and unused.
- The product must be returned in its original packaging, along with the original purchase receipt.
- You will be responsible for the re-shipping costs.
- Please note that the exchange policy is only applicable to orders made on the official waterdropfilter.com.
How to Return a Product?
If you would like to return a product, please follow these guidelines:
Step 1: Contact our customer service team before returning a product. We will respond with return instructions within 24 hours.
How to contact us:
Email: service@waterdropfilter.com
Toll-free Tel: (888)-352-3558
Step 2: Prepare the package after receiving confirmation from the customer service team, and please note the following requirements:
- Include the order number in the package. You can print out the order detail page or leave a note inside the package.
- Ensure the package contains the original receipt of purchase.
- Return the product in the original packaging we provided.
- The product must be damage-free (this does not apply to defective products, as damage will void the refund).
Step 3: Contact our customer service and provide your return tracking number. We will track the package and process your refund within 5 working days after receiving and inspecting the package.
General Information for All Returns:
1. Defective Products:
If you receive a product with quality issues or damages, please contact our customer service team. we provide free returns, replacement with a new product, and comprehensive technical support.
2. Non-Quality Issues:
- You are responsible for shipping the products to the return address provided.
- Returned items will undergo inspection before issuing a refund.
- Refunds will be processed within 5 working days after the item has been inspected, and it may take 4-7 days to be reflected in your credit card statement.
- We highly recommend using a traceable and insurable shipping method for your return. We are not responsible for returns lost or damaged in transit, and you will need to file a shipping claim.
- Please note that orders made via 3rd-party sellers, including Amazon, are not eligible for our return policy.
- All returned items must be disassembled and repackaged as they were originally received. Items returned in a condition other than "like new" will be subject to a 10% restocking fee to cover repairs or part replacement. The restocking fee will be deducted from your refund.
Price Match Policy:
At Waterdrop, we highly value our customers' shopping experience. That's why we offer a 30-day price match guarantee. If you happen to notice a price reduction on the item you purchased at waterdropfilter.com within 30 days of your purchase, you are eligible to claim a price-match refund. To request a refund, please contact us at service@waterdropfilter.com. We are here to assist you promptly.
Note: This Waterdrop price-change refund policy only applies to items shipped and sold by waterdropfilter.com. If you're buying from a different vendor, you'll need to contact that seller if the price drops.



















Ultrafiltration Under Sink Water Filter System Waterdrop TSU-W
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Key Feature
Shipping rates and delivery estimates
Shipping Method |
Estimated Delivery Time |
Costs |
Standard Shipping |
3-6 Business Days |
Free |
Express Shipping |
2-5 Business Days |
€5.99 |
* 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 origin
The package will be shipped from one of our DE warehouses closest to your location.
* If you have any questions, you can contact our customer via LiveChat or email to service@waterdropfilter.com, we will reply to you as soon as possible!
Shipping areas
The products can be delivered to Malta, Luxembourg, Estonia, Greece, Croatia, Latvia, Slovenia, Denmark, Slovakia, Ireland, Finland, Sweden, Portugal, Hungary, Belgium, Netherlands, Spain, Italy, France, Norway, Romania, Lithuania, Bulgaria, Czech. Rep., Poland ,Austria, Switzerland, Monaco, and Turkey.
International shipping
We are sorry that the international shipping service is not supported for the time being.
Shipping Carriers
Amazon functions as our logistics partner to ship out Waterdrop products. They will choose the carrier that they think works best for our customers.
Note: We don't accept requests to specify a certain carrier to deliver the package.
Delivery Time Exceeded
If your order is delayed, please contact us via email service@waterdropfilter.com, we will check the situation with the transportation company in time. Thanks for your understanding and support.
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.
Order Cancellations:
If you wish to cancel an order, please contact our customer service team.
1. If you contact us within 24 hours of purchase:
Since most orders ship the same day, kindly email us at contact service@waterdropfilter.com or call us at (888)-352-3558 within 24 hours of placing the order. There will be no cancellation fees for standard items canceled before shipment. If the package has already been shipped, we will provide a prepaid label for return, and once we receive the package from you, we will issue a refund.
2. If you contact us after 24 hours of purchase:
- In such cases, you will need to bear the shipping fee if the package is already shipped (subject to our system status, not the order status).
- The product must be damage-free, packed in the original packaging we sent to you, and returned with the original receipt of purchase.
- We will process your refund after receiving the package.
30-day Risk-free Return Policy:
- You may return an item within 30 days of receipt. All returned items must be disassembled and repackaged in their original condition.30 days risk-free return policy applies to all items. We do not charge a restocking fee, but the customer is responsible for the return postage. If the return request is related to a quality issue, we will cover the return postage. Please note that the 30-day risk-free return policy only applies to orders placed within the European Union.
Return after 30 Days of Receipt:
- You may still return any item after 30 days of receipt. In this case, customers are responsible for the return shipping cost. The total cost of shipping will be deducted from your refund. All returned items must be disassembled and repackaged as they were originally received. A 10% restocking fee will be applied to all returned products. However, in the event of any return requests related to a quality issue, we offer free returns or replacement with a new product.
1-year Warranty:
Enjoy peace of mind and confidence in your purchase with our 1-year warranty, backed by lifetime technical support.
If you receive a damaged item and wish to file a claim, please email service@waterdropfilter.com with your order information and a picture of the damaged or incorrect product. We are eager to assist you.
For products that become defective during the warranty period due to a quality issue, rather than your own breakage or misuse, we can accept a free return, provide free repair service, or issue a new replacement.
Exchange Policy:
1. Defective Products:
If you receive a product with quality issues or damages, please contact our customer service team within 30 days of receipt. We will provide you with a free exchange service. Please provide order information and photos of the damaged product when contacting our customer service team for better assistance.
2. Non-Quality Issues:
If you wish to exchange a product for non-quality-related reasons, please note the following:
- The product must be within 30 days of purchase and unused.
- The product must be returned in its original packaging, along with the original purchase receipt.
- You will be responsible for the re-shipping costs.
- Please note that the exchange policy is only applicable to orders made on the official waterdropfilter.com.
How to Return a Product?
If you would like to return a product, please follow these guidelines:
Step 1: Contact our customer service team before returning a product. We will respond with return instructions within 24 hours.
How to contact us:
Email: service@waterdropfilter.com
Toll-free Tel: (888)-352-3558
Step 2: Prepare the package after receiving confirmation from the customer service team, and please note the following requirements:
- Include the order number in the package. You can print out the order detail page or leave a note inside the package.
- Ensure the package contains the original receipt of purchase.
- Return the product in the original packaging we provided.
- The product must be damage-free (this does not apply to defective products, as damage will void the refund).
Step 3: Contact our customer service and provide your return tracking number. We will track the package and process your refund within 5 working days after receiving and inspecting the package.
General Information for All Returns:
1. Defective Products:
If you receive a product with quality issues or damages, please contact our customer service team. we provide free returns, replacement with a new product, and comprehensive technical support.
2. Non-Quality Issues:
- You are responsible for shipping the products to the return address provided.
- Returned items will undergo inspection before issuing a refund.
- Refunds will be processed within 5 working days after the item has been inspected, and it may take 4-7 days to be reflected in your credit card statement.
- We highly recommend using a traceable and insurable shipping method for your return. We are not responsible for returns lost or damaged in transit, and you will need to file a shipping claim.
- Please note that orders made via 3rd-party sellers, including Amazon, are not eligible for our return policy.
- All returned items must be disassembled and repackaged as they were originally received. Items returned in a condition other than "like new" will be subject to a 10% restocking fee to cover repairs or part replacement. The restocking fee will be deducted from your refund.
Price Match Policy:
At Waterdrop, we highly value our customers' shopping experience. That's why we offer a 30-day price match guarantee. If you happen to notice a price reduction on the item you purchased at waterdropfilter.com within 30 days of your purchase, you are eligible to claim a price-match refund. To request a refund, please contact us at service@waterdropfilter.com. We are here to assist you promptly.
Note: This Waterdrop price-change refund policy only applies to items shipped and sold by waterdropfilter.com. If you're buying from a different vendor, you'll need to contact that seller if the price drops.
Model number
WD-TSU-B
Replacement Filter
WD-TSPP / WD-TSUF / WD-TSCT
Power Specification
4.5V AA battery * 3
System Size (L*W*H)
14.81” * 4.68” * 13.97”
Feed Water Temperature
41-100 °F / 5-38 °C
Feed Water Pressure
14.5-87 psi / 0.1-0.6 MPa
What is the rated input water pressure of the ultrafiltration water filter system?
What is the feed water temperature of this ultra-filtration undersink filtration system?
How to install the ultra-filtration undersink filtration system?
Step 2: Install the faucet.
Step 3: Install the batteries and place the system.
Step 4: Connect tubing.
Step 5: Start up the system.
You can get a detailed instruction and a user manual on the product page. It’s suggested to search and watch the “How to install Waterdrop ultrafiltration system” on YouTube.
What size of the hole do I need to drill for the faucet of this ultrafiltration system?
Besides, a sticker is out of box, which could be used as a reference while drilling the hole.
How often do I need to change the filter?
Does the ultra-filtration undersink filtration system produce waste-water?
Does the ultrafiltration undersink water filter system require a wall plug?
Do I need plumbing services to install the system?
What does this ultra-filtration undersink filtration system reduce?
How does ultrafiltration membrane work?
What is the difference between filtration and ultrafiltration?
What are the differences between this ultrafiltration system(TSU) and the dual carbon system(TSC)?
Filtration accuracy: TSU 0.01μm / TSC 0.5μm
Different filter: TSC: 3 filters, PP+CS+CT / TSU: 3 filters, PP+UF+CT
The TSU can reduce the bacteria from the source water while the TSC cannot.
What is the difference between ultrafiltration and reverse osmosis?





















Ok
Dopo 15 giorni i filtri fanno il loro dovere, il gusto e veramente buono.
Very easy to install, fits nicely under the sink cabinet and looks great.
100% recommend it 😊
Great choice if you have a fairly good tap water but still want to control chlorine and and other quality indicators while maintaining essential minerals and largely reducing plastic waste from bottled water. Seamless instalation and perfect working without the need for electricity.
Sono molto soddisfatto dell'acquisto.
Acqua molto buona da bere e impianto facile da montare e di buona qualità.
Lo consiglio a tutti!!