YAMATARO F6A028N RO Feed Water Adapter, 1/2-inch to 3/8-inch Push-Fit

YAMATARO F6A028N is a three-port feed-water adapter for adding a 3/8-inch push-fit line to a 1/2-inch plumbing connection. Its lever-operated ball valve can isolate the filter line for maintenance, but the RO tube is not included.

At a glance

Three-way fitting connects a threaded water supply and existing faucet line with a 3/8-inch push-fit branch.
A lever-operated shut-off valve controls flow to the push-fit outlet, useful when servicing a connected filter.
The listing describes a swivel connection and a 360° rotating nut for installation in confined spaces.

Price

$15.22Save 15%

Reference price: ~~$17.90~~

Price checked: 12 Nov 2026

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Often bought together

RO Feed Water Adapter G 1/2" to 3/8" Push Fit Quick Connect Fitting for RO Filter with Shut-Off Ball Valve Water Supply Diver

$30.71

Pros and cons

Pros

The built-in valve lets you isolate the connected filter line without shutting off the main water supply, according to the listing.
A push-fit outlet provides a direct connection for compatible 3/8-inch tubing.

Cons

RO tubing is not included, so a compatible tube is needed for the push-fit outlet.

Technical specifications

12 specifications

Identity
Brand	YAMATARO
Model	F6A028N
Ports	3
Valve type	Ball Valve
Outlet connection	Push Fit
Thread type	Swivel
Listed size	1/2" to 3/8" Ball
Listed specification	ASTM A240, NSF/ANSI 372

Dimensions and installation
Dimensions listed	6 x 4.6 x 3.8 centimetres
Weight listed	85 Grams
Inlet connection size	0.5 Inches

Finish and material claims
Exterior finish	Brushed Stainless Steel with Nickel Finish

What to know before buying

Listing details to confirm

The listing gives a G1/2-inch male × G1/2-inch female × 3/8-inch push-fit configuration, while the details also describe a 0.5-inch inlet and a size of “1/2\" to 3/8\" Ball”. Confirm the thread orientation and tubing size against your existing fittings before purchase. The maker claims 304 stainless steel and lead-free construction, but the details also call the finish brushed stainless steel with nickel finish and do not clearly specify the base material. The cited standards are listing claims, not independently verified here.

What’s in the box

Included

Feed water adapter

Who is it for?

A good fit for

Under-sink RO or water-filter installations needing a 3/8-inch push-fit branch from a compatible 1/2-inch threaded connection.
Filter owners who want a separate shut-off lever for maintenance.

Less suited to

Buyers who need the RO tube included.
Installations whose existing threads or tubing do not match the adapter's listed connections.

YAMATARO F6A028N RO Feed Water Adapter, 1/2-inch to 3/8-inch Push-Fit · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 1 ratings

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The supplied evidence contains only one aggregate rating and no written customer feedback. That single rating is too limited to establish a broader pattern or identify praised features. Buyers should base compatibility on the listed thread and push-fit details, which are not consistently stated.

Frequently asked questions

Does the adapter include RO tubing?

No. The listing says the RO tube is not included.

What tubing connection does it use?

The listing specifies a 3/8-inch push-fit outlet. Match your tube to that size and confirm its fit before installation.

Can the filter line be shut off separately?

The adapter is described as having a lever-operated ball valve on the push-fit outlet, allowing that line to be isolated.

Will it fit every under-sink water supply?

No universal fit is established. The listing describes G1/2-inch male and female threads and a 3/8-inch push-fit branch, so compare these with your plumbing.