Aquasana Claryum Direct Connect Under Sink Water Filter (AQ-MF-1)

Aquasana Claryum Direct Connect Review: An NSF-Certified Under-Sink Filter for a Pressurised Van Tap

If your van has a 12V pump and a real faucet, the obvious place for a drinking-water filter is under the sink, on the cold line, so that every glass from the tap is filtered without a pitcher on the counter. The Aquasana Claryum Direct Connect (model AQ-MF-1) is a single-cartridge carbon filter built for that job in a house kitchen. It connects to the cold-water supply through a dual-port adapter and filters the water going to your existing faucet, with no extra faucet and no hole drilled in the counter.

What sets it apart from most filters you'll see marketed to van owners is its paperwork. Aquasana's manual and performance data sheet say the system is certified by IAPMO R&T against NSF/ANSI Standards 42, 53 and 401, and the data sheet lists every contaminant claim with its test result. It is a filter, not a purifier, and Aquasana states plainly that it is not for microbiologically unsafe water. Both halves of that matter in a van.

What the Amazon link sells: the Aquasana Water Filter for Sink Faucet | Claryum Direct Connect | AQ-MF-1, ASIN B088GSC89B, sold as the complete filter system (system head, cartridge, mounting hardware, dual-port adapter and 3/8-inch tubing). The listing's part-number field shows a UPC rather than the model, but the title and variant both name AQ-MF-1. The replacement cartridge is AQ-MF-1-R.

This review is research-based. VanLifeKitchens doesn't test products hands-on. The figures below come from Aquasana's owner's manual, performance data sheet and product page, and from the Amazon listing. Anything we've calculated is labelled as our estimate.

Choose this if:

• Your van has a pressurised cold-water line, such as a 12V diaphragm pump feeding a faucet.
• You fill from treated municipal or campground taps and want to reduce chlorine taste, lead, PFOA/PFOS and other chemicals at the tap.
• You'd rather have filtered water from the faucet than refill a pitcher.

Skip this if:

• Your sink is fed by a foot pump or a gravity jug. The filter needs at least 10 psi, and those systems don't supply it (see below).
• You fill from creeks, lakes or unknown spigots. This filter isn't designed for microbiologically unsafe water and makes no bacteria or virus claim.
• Your van sits below freezing and you can't keep the cabinet above 35°F.

What it is: filter, purifier or taste filter?

The water filtration guide on this site separates three kinds of product, and this one sits clearly in the middle:

• A taste filter only handles aesthetics, such as chlorine. NSF/ANSI 42 covers that.
• A health-claim filter reduces specific health-related contaminants, such as lead or cysts. That's NSF/ANSI 53, and NSF/ANSI 401 covers trace "emerging" compounds such as some pharmaceuticals.
• A purifier also handles bacteria and viruses, tested to a microbiological purifier protocol.

The Claryum Direct Connect is certified to 42, 53 and 401, so it is a taste filter plus a health-claim filter. It is not a purifier. Aquasana's data sheet says: "Do not use with water that is microbiologically unsafe or of unknown water quality without adequate disinfection before or after the system." Its cyst reduction claim comes with the note that systems certified for cyst reduction "may be used on disinfected waters that may contain filterable cysts". In plain terms: start with treated water. Our water filtration guide explains the standards in more depth.

What it removes, per Aquasana's data sheet

Aquasana's performance data sheet lists these results among others (all from Aquasana's lab testing under the named standards):

The 53 list also includes MTBE, turbidity and a long table of VOCs, pesticides and disinfection by-products such as trihalomethanes, reduced by surrogate testing. Aquasana's summary is "up to 99% of 78 contaminants".

What it does NOT remove

This is the half most product pages skip. From Aquasana's own documents:

• Bacteria and viruses. No claim. Aquasana says not to use it on microbiologically unsafe water without disinfection.
• Fluoride. Aquasana's product page says it "does not remove fluoride".
• Total dissolved solids and hardness. The Amazon listing says it "does not reduce TDS", and it is designed to retain calcium, magnesium and potassium. It doesn't soften hard water. Aquasana suggests a system with a pre-filter for hard water.
• Anything not on the data sheet. Aquasana states that all contaminants it reduces are listed. Nitrate and arsenic, for example, are not listed, so assume it doesn't reduce them.

Specifications and sources

How it fits a van water system

It needs pressure. Aquasana's operating range starts at 10 psi. A 12V pump such as the SHURflo Revolution 4008, which SHURflo's data sheet shows switching off at 55 psi and restarting at 40 psi, runs comfortably inside the 10 to 125 psi range. A foot pump does not: Whale publishes a 3 m maximum discharge head for the Babyfoot GP4618, which is about 4.3 psi by our conversion, below the filter's minimum. A gravity jug produces far less. For jug-and-foot-pump builds, a gravity pitcher such as the LifeStraw Home is the right kind of filter, as the no-plumbing sink guide explains.

It filters everything at that tap. Because it sits on the cold line to your existing faucet, it filters washing-up water as well as drinking water. That spends capacity. As our estimate: a van using 3 gallons a day at the cold tap would reach 784 gallons in about 260 days, so Aquasana's six-month replacement interval would come first. A couple washing dishes under a running tap could use 5 gallons a day and reach 784 gallons in about five months. Write the install date on the cartridge, as Aquasana suggests, and change at whichever limit comes first. If you want to keep washing water off the filter, you'd need a separate drinking-water faucet, which this kit doesn't include.

Fittings. The kit assumes a house-style layout: a cold-water shut-off valve that the dual-port adapter threads onto, with your faucet's supply line reattached to the adapter, and 3/8-inch tubing to and from the filter head. Many van builds use PEX or push-fit fittings and may not have a threaded shut-off valve under the sink. Check what your plumbing ends in, and plan an adapter or a shut-off valve before you start. Aquasana says the system head must be within 3 feet of the cold supply line.

Space. The Amazon listing gives 4 x 4 x 20.5 inches, and Aquasana's manual asks for 3 inches of clearance below the cartridge so you can twist it off. That's about 23.5 inches of height if you mount it vertically, which many van sink cabinets don't have. The manual also allows horizontal floor and wall mounting, which suits a low van cabinet better. Screw it to a solid cabinet wall or floor, not thin panelling, and keep the tubing runs short and supported so they don't chafe on a rough road.

Leaks. Aquasana's warranty says a filter should be installed so that a leak won't cause damage, and excludes water damage. In a van, that's a real consideration: put it over a drip tray or a waterproofed cabinet floor, and check the quick-connect fittings after the first few drives. Aquasana says to flush a new cartridge for 15 minutes and not to drink the flushed water. On a 1.2 gpm van pump at 40 psi, that's roughly 18 gallons by our estimate, a big chunk of a small fresh tank. Plan the first flush at a campsite tap, or fill the tank first.

Freezing, heat and sunlight

Aquasana says the unit must be protected from both direct sunlight and freezing, and its warranty excludes a filter "installed in direct sunlight or exposed to freezing temperatures". It also rates the filter for water between 35°F and 100°F, cold water only.

For a van, that means:

• Winter. If the cabinet can freeze, the filter can't stay full of water there. Aquasana doesn't publish a winterising procedure, and its manual says not to operate the system without a filter installed. The conservative approach is to shut off the supply, remove the cartridge and keep it somewhere above freezing, and keep the pump off until it's refitted. Ask Aquasana before you leave the head in a freezing van.
• Summer. A tank in a parked van in hot sun can warm past 100°F. If the water feels hot from the cold tap, it's outside the filter's rated range.

The water filtration guide and the winter van kitchen guide cover freezing for every filter type.

Limitations

• Not a purifier. No bacteria or virus claim. Treated source water only.
• Pressure systems only. Needs 10 psi at minimum.
• Filters dishwater too. Capacity goes faster than on a drinking-only filter.
• House-style fittings. The adapter assumes a threaded shut-off valve and 3/8-inch lines.
• Tall when mounted vertically. About 23.5 inches including change clearance.
• Must not freeze or sit in sunlight, per Aquasana's warranty.
• Doesn't remove fluoride, hardness or TDS, and makes no nitrate or arsenic claim.
• One-year warranty.

How it compares on this site

The Clearsource protects the tank and pump on the way in. The Aquasana treats water on the way out, after it has sat in your tank and lines, which is the job the layered setup in our water filtration guide gives to the galley filter. For a plumbed van, it can take the place of the pitcher as that galley layer. It doesn't replace a portable backup such as the Sawyer Squeeze, or a purifier for travel where viruses are a risk.

Which guides it fits

• Water filtration complete guide: the galley layer of the layered setup, for vans with a pressurised tap.
• Van water system setup: the pump, tank and plumbing it attaches to.
• No-plumbing sink guide: the "upgrading later" path to a 12V pump, after which an under-sink filter becomes possible.

Verdict

The Aquasana Claryum Direct Connect is an unusually well-documented under-sink filter: certified by IAPMO R&T to NSF/ANSI 42, 53 and 401, with a published data sheet showing chlorine, lead, cyst, PFOA/PFOS and VOC reductions, a 784-gallon or six-month cartridge life and a 10 to 125 psi operating range that a 12V van pump sits well inside. It's a filter, not a purifier, so it belongs on treated water. It filters everything that comes out of the tap, and it can't freeze or sit in sun. If you have a pressurised galley tap, fill mostly from treated water and have room to mount it, it's a cleaner daily setup than a pitcher. If your sink runs on a foot pump or a jug, it isn't the right tool.

FAQ

Does the Aquasana Claryum Direct Connect remove bacteria and viruses? No. Aquasana makes no bacteria or virus claim and says not to use it with microbiologically unsafe water or water of unknown quality without disinfection. It is certified for cyst reduction on disinfected water.

Will it work with a foot pump or a gravity jug? No. Aquasana's minimum operating pressure is 10 psi. Whale's published 3 m discharge head for the Babyfoot foot pump is about 4.3 psi by our conversion, and a gravity jug produces much less. Use a gravity pitcher filter for those setups.

Will it work with a 12V van water pump? Yes, if the pump's pressure falls within 10 to 125 psi. SHURflo's 4008 data sheet shows it switching off at 55 psi and restarting at 40 psi, which is within range.

How often does the cartridge need replacing? Aquasana says every 784 gallons or about six months, whichever comes first, and sooner if sediment slows it. Because it filters all cold water at the faucet, washing-up water counts toward the 784 gallons.

What certifications does it have? Aquasana's manual and data sheet say the system is certified by IAPMO R&T against NSF/ANSI Standards 42, 53 and 401 for the claims listed on its performance data sheet.

Does it remove fluoride? No. Aquasana's product page says it does not remove fluoride. It also doesn't reduce TDS or soften hard water.

Can it stay in the van over winter? Aquasana says it must be protected from freezing, and its warranty excludes freeze damage. In a van that may freeze, remove the cartridge, keep it above freezing and don't run water through the system without a cartridge fitted.

Sources and verification

• Aquasana, AQ-MF-1 Claryum Direct Connect owner's manual (PDF): box contents, 784-gallon and six-month replacement, 10 to 125 psi, 35 to 100°F cold water only, sunlight and freezing warnings, microbiologically unsafe water warning, 3-inch clearance, 3-foot distance from the supply line, mounting options, 15-minute flush, IAPMO R&T certification statement, one-year warranty and exclusions. https://aquasana.com/on/demandware.static/-/Sites-aquasana-Library/default/dw96561f6b/PDF/AQ-MF-1_Install.pdf (checked 2026-10-13)
• Aquasana, AQ-MF-1 performance data sheet (PDF): NSF/ANSI 42, 53 and 401 reduction results for chlorine, chloramine, lead, cysts, mercury, asbestos, PFOA/PFOS, VOCs and 401 compounds; rated flow 1.5 gpm; statement that all reduced contaminants are listed. https://www.aquasana.com/on/demandware.static/-/Sites-aquasana-Library/default/PDF/AQ-MF-1_Performance_Data.pdf (checked 2026-10-13)
• Aquasana, Claryum Direct Connect product page: model AQ-MF-1, 3 in wide by 20 in tall, 1.5 gpm, IAPMO certification to NSF/ANSI 42, 53 (including P473) and 401, mineral retention, no fluoride removal, 3/8-inch water lines. https://www.aquasana.com/drinking-water-filter-systems/claryum-flash (checked 2026-10-13)
• Amazon product listing for ASIN B088GSC89B, the listing this review links to: title (Claryum Direct Connect, AQ-MF-1), complete filter system variant, 4 x 4 x 20.5 in, 3-inch change clearance, no TDS reduction, parts for 3/8-inch installations, one-year warranty, availability (checked 2026-10-13)