Waterdrop WD-TSA-UF 0.01 μm Under-Sink Water Filter

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Product guide

Waterdrop WD-TSA-UF 0.01 μm Under-Sink Water Filter

The Waterdrop WD-TSA-UF is an under-sink ultrafiltration system advertised with a 0.01 μm membrane and three replaceable filters. It is intended for municipal cold-water lines, retains dissolved minerals and does not reduce TDS, so it is not a reverse-osmosis option for buyers seeking lower TDS.

At a glance

Uses three compact filters in a 9-stage filtration configuration, according to the listing.
Advertised to help reduce chlorine, taste and odor, fluoride, heavy metals, rust, sediment, sand and particles.
Designed for standard municipal cold-water connections. The listing says it does not reduce TDS and retains beneficial minerals.
Twist-and-lock and push-to-connect fittings are described for installation and filter replacement.

Price

$111.99Save 25%

Reference price: ~~$149.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

The three-filter layout offers staggered replacement intervals rather than replacing every filter on one schedule.
The stated maximum flow rate is 1.5 gpm, providing a useful published reference for comparing under-sink systems.
The listed kit includes the system, inlet and outlet hose, a converter set and Teflon tape.

Cons

Not suitable for hot-water lines, and the listing says well-water use requires pre-filtration.
Does not reduce TDS, which rules it out for buyers specifically seeking dissolved-solids reduction.

Technical specifications

17 specifications

Identity
Brand	Waterdrop
Model	WD-TSA-UF

Filtration
Purification method	Ultra Filtration
Advertised filtration accuracy	0.01 μm
Advertised filtration stages	9-stage
Rated capacity	8000 gallons
Supported maximum TDS level	700

Flow and temperature
Maximum flow rate	1.5 gpm
Lower temperature range	35 °F
Upper temperature rating	100 °F

Power and configuration
Power configuration	Mechanical Water Pressure
Installation type	Under Sink

Dimensions and installation
Dimensions listed	12.9"L x 4.3"W x 12.4"H

Materials and protection
Material listed	NSF/ANSI Approved Components

Filter replacement schedule
WD-10PP filter life	up to 6 months
WD-10GC filter life	8–12 months
WD-10UF filter life	up to 12 months

What to know before buying

Use with municipal cold water and not hot water. For well water, the manufacturer recommends a pre-filtration system. The system is stated not to reduce TDS and to retain dissolved minerals.
The manufacturer describes compatibility with standard 3/8-inch or 1/2-inch female NPT faucet connections. It says quick-connect faucets may need adapter fittings.

Listing details to confirm

The listing describes the system as 8-stage in one product detail and 9-stage in its feature copy. It also gives a general lifespan of up to 12 months, while separately listing an 18-month filter life cycle and individual filter intervals of up to 6 months, 8–12 months and up to 12 months. Confirm the applicable replacement schedule for the selected filters. The filtration, durability and connection statements are manufacturer claims, not independent verification.

What’s in the box

Included

System ×1
Inlet and outlet hose
3/8"–1/2" converter set ×1
Teflon tape ×1

Who is it for?

A good fit for

Households on municipal cold-water supplies looking for an under-sink filter that retains dissolved minerals.
Buyers who prefer a multi-filter system with listed, staggered replacement intervals.
People comfortable checking faucet-thread compatibility before installation.

Less suited to

Buyers seeking reverse osmosis or reduction of TDS.
Homes needing filtration for hot-water lines or untreated well water without pre-filtration.

Waterdrop WD-TSA-UF 0.01 μm Under-Sink Water Filter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 295 ratings

5 stars73%73%
4 stars14%14%
3 stars3%3%
2 stars3%3%
1 star7%7%

Customer feedback reports better-tasting water and generally straightforward installation, while experiences with water pressure, filling speed, filter cost and leakage are mixed. Those concerns matter because the advertised 1.5 gpm maximum is a listing specification, not a guarantee of the flow buyers will see in their plumbing. The feedback also reflects perceived water quality, not independent confirmation of specific contaminant reduction.

Positive themes

Customers report improved water taste and water quality.
Installation is described as straightforward and requiring little effort.

Mixed feedback

Some customers report good pressure, while others describe a substantial pressure drop.
Reports differ on filtration speed, with some finding it fast and others describing slower cup filling.
Some customers report no leaks, while others report leakage. Opinions about filter cost also vary.

Frequently asked questions

Does the WD-TSA-UF reduce TDS?

No. The listing says it does not reduce TDS and retains beneficial dissolved minerals.

Can it be used with well water or hot water?

It is described for municipal cold-water lines, not hot water. For well water, the manufacturer recommends using pre-filtration first.

How often do the filters need replacement?

The listed intervals are up to 6 months for the WD-10PP, 8–12 months for the WD-10GC and up to 12 months for the WD-10UF, depending on water quality and use.

What faucet connections does it support?

The listing describes standard 3/8-inch or 1/2-inch female NPT threads. It says quick-connect faucets may require adapter fittings.