Waterdrop AS13 Reviews: See Why 0 Shoppers Rated It 0 Stars!

Waterdrop AS13 Review: A No-Nonsense Under-Sink Filter That Prioritizes Practicality

The Waterdrop AS13 aims squarely at households and small offices that want cleaner-tasting water without the complexity or waste of a reverse osmosis system. On paper, this compact unit focuses on the essentials: straightforward installation, multi-stage filtration, and a stainless-steel build that should handle everyday use. If you're researching an "under sink water filter review Waterdrop AS13," the big picture is simple; the AS13 is designed to sit quietly under your sink and improve taste and odor while tackling common contaminants like chlorine and lead, all without a drain line or external power.

Before we go deeper, a few headline specs set the tone. It's an under-sink filter that installs with a traditional under-sink setup and uses a multi-stage design. Waterdrop lists the WD-AS13 model with a 22-gallons/day capacity, a long 8,000-gallon cartridge life (paired with a 12-month replacement interval), and a household-friendly 1.0 GPM flow rate. None of that is flashy, but it's precisely what many kitchens actually need.

Detailed Specs & Features

Instead of a single cartridge, the Waterdrop AS13 runs water through six stages, combining a polypropylene pre-filter, granular carbon/KDF, and a carbon block core, with additional layers for structure and polishing. The headline for performance is taste improvement and reduction of common substances: the brand lists chlorine, lead, PFAS (including PFOA/PFOS), and other heavy metals among its targets. A fine 0.5-micron sediment filter stage is noteworthy; on paper, that should help with visible particulates and clarity in many municipal supplies.

What the AS13 doesn't do is just as important. This is not a reverse-osmosis unit, so there's no RO membrane or wastewater. In fact, the system claims 100% water efficiency since it filters inline and sends all treated water to your faucet; great if you're trying to avoid the waste associated with RO. There's no UV sterilization either, so if you need certified microbial removal for healthy water with biological risk, this isn't your pick; it's better framed as an advanced taste/chemical reduction system for municipal feeds or relatively clean wells.

From a practical standpoint, the AS13 supports a 15 psi minimum up to a 100 psi maximum, and it's rated for typical kitchen temperatures (41-100°F). Build materials lean heavily on stainless steel for the housing and faucet, which helps with durability and a "premium" feel. And while the unit lists a 30 dB noise level, keep in mind this is a non-pumped, non-powered system; any sound you notice in daily use should be minimal, essentially just water moving through media.

Certifications matter in the filtration world, and the AS13 lists NSF/ANSI 42 and NSF/ANSI 372. NSF 42 focuses on aesthetic effects (like chlorine taste/odor), while NSF 372 covers lead-free materials. It's also clearly labeled for limited warranty protection with 1-year coverage on parts and labor, which aligns with its replace the cartridge annually approach.

Design & Build

On design, the AS13 keeps things tidy: a 5.9-inch width, 7.28-inch depth, and 15.35-inch height means it fits under most sinks, and Waterdrop notes you'll want a little extra space (about an inch of clearance and 3 inches for cartridge replacement). The stainless-steel housing and faucet should resist corrosion and match many modern kitchens, while quick-connect fittings aim to make DIY installation approachable. There's no booster pump, no tank, no app to fiddle with; just a cartridge to swap, and a filter life indicator to remind you when it's time.

If you're coming from a bulky, pressurized-tank RO system, the AS13 will feel refreshingly compact and lighter on the cabinet. According to its design and materials, this is the type of filter you install and largely forget about for the year, until the change light tells you otherwise.

Performance

How does it "perform," at least as the specs imply? The combination of PP sediment media with carbon and KDF suggests strong taste and odor polishing, chlorine reduction, and a measure of heavy-metal adsorption. The brand calls out chlorine reduction at 63%, which is decent though not category-leading; if your city water tastes like a swimming pool, that should still be a noticeable improvement. The presence of PFAS on the target list is timely; many buyers specifically seek systems that list PFAS/PFOA/PFOS reduction, and a tight carbon block often contributes to that claim.

Flow is rated at 1.0 GPM (peaking at 1.6 GPM), which should keep small households from feeling throttled. The spec sheet pegs the "suitable household size" at 4-6 people, and while that seems optimistic for heavy simultaneous demand, the design does allow for more than one use at a time. If your family frequently fills pots and runs the dishwasher while someone's getting a glass of water, you may still notice pressure changes, but typical kitchen cadence is unlikely to be frustrating.

One spec to sanity-check is cartridge life. The AS13 shows an 8,000-gallon capacity and a 12-month interval, which fits the market. There's also an "8000 liter/month" line in the data that reads oddly; based on the rest of the sheet, it's reasonable to treat 8,000 gallons per cartridge and annual replacement as the guiding numbers. That being said, real-world life depends on incoming water quality and usage. If your water is sediment-heavy or tastes strongly chlorinated, expect the filter to work harder and need replacement sooner.

Extra Features

The extras are refreshingly simple. You get a filter life indicator and LED status display, easy tool-free cartridge changes (about three minutes), and broad accessory compatibility (extra faucet, TDS meter, leak detector, etc.). There's no app, no Wi-Fi, no brilliant faucet; whether that's a pro or a con depends on your preferences. For many buyers, "set it and forget it" is precisely the point.

Pros & Cons

Pros

• Stainless-steel housing and faucet feel durable and kitchen-friendly.
• Six-stage design with 0.5-micron sediment filtration for clearer, better-tasting water.
• 100% water efficiency; no wastewater, no drain line, no power.
• DIY-friendly install with quick-connects and tool-free cartridge swaps.
• Targets PFAS/PFOA/PFOS, chlorine, and heavy metals according to the spec sheet.

Cons

• Chlorine reduction is listed at 63%, solid, but not best-in-class for heavy chlorine taste.
• No certified microbial (bacteria/virus) removal; not meant for biologically unsafe sources.
• No app or smart tracking; some buyers may want usage-based analytics.
• The spec sheet shows an odd "8000 liter/month" line that conflicts with the 8,000-gallon capacity.

Price & Value for Money

Value is where the Waterdrop AS13 gets interesting. As of writing, we've seen it listed at $56.99 at WaterdropFilter.com. That's a compelling price for a stainless-clad, six-stage under-sink system with a one-year cartridge interval and a 1.0 GPM flow rate. If you want the absolute highest chlorine reduction or certified microbial removal, you'll be shopping different (and pricier) categories. But for municipal users who primarily want better flavor, less chlorine smell, and some peace of mind regarding PFAS and heavy metals, the AS13's spec sheet offers a lot for relatively little.

Who should consider it? Renters and homeowners who prefer simple maintenance, minimal under-sink footprint, and zero wastewater. Who might skip it? Households dealing with boil-water advisories, uncertain sound quality with microbial concerns, or those who specifically want RO-level TDS reduction and a measurable change on a TDS meter. The AS13 is more about taste and chemical reduction than dissolving solids removal, by design.

Quick Take

The Waterdrop AS13 focuses on practical gains: better taste, modest chlorine reduction, and a clean install that doesn't hijack your cabinet. It avoids the complexity of RO systems and the baggage of wastewater lines, which many buyers will love.

On the flip side, it's not built for microbial hazards, and the chlorine spec isn't top of the charts; so match it to the right water source and expectations.

Closing Recommendation

Based on the specifications and intended use, the Waterdrop AS13 is an easy recommendation for city-water households that want to improve taste and reduce common chemicals without the waste or maintenance overhead of reverse osmosis. The stainless build, multi-stage media stack, and reasonable flow rate make it a sensible, budget-friendly upgrade.

If you need full-spectrum contaminant removal or a significant TDS drop, look elsewhere; but if you're after cleaner-tasting water with straightforward upkeep, the AS13 fits the bill.

Verdict

Rating: Based on the specifications and overall feature set, we believe Waterdrop AS13 deserves 4.2 out of 5.

• Winner Feature => Six-stage, 0.5-micron filtration and stainless housing deliver solid taste improvement with simple upkeep.
• Needs Improvement => Chlorine reduction could be more substantial, and there's no certified microbial removal for risky water sources.