Beduan Stainless Water Line Adapter 3/8 Female to

Product Description

The Beduan Stainless Water Line Adapter is designed to solve one of the most common connection problems in kitchen and bathroom plumbing: matching older shutoff valves with modern faucet supply lines. This high-quality adapter converts a 3/8 compression female connection to a 1/2 NPT male connection, making it the perfect solution when your existing angle stop or shutoff valve does not match your new faucet hose. Precisely engineered dimensions ensure a secure and leak-free fit. The 3/8 compression female side has an inner diameter of 0.56 inch (14.2 mm), and is not compatible with 0.61 inch connections, so you can be confident you are choosing the right size for your installation. The 1/2 NPT male side has an outer diameter of 0.84 inch (21.33 mm), designed to thread smoothly into standard 1/2 NPT angle stops and fittings. Constructed from durable stainless material, this adapter offers excellent corrosion resistance and long service life in both kitchen and bathroom environments. The flat inside design helps create a reliable seal when used with compatible flexible water lines and stop valves, reducing the risk of drips or leaks over time. Installation is straightforward, even for DIY homeowners. Simply thread the 1/2 NPT male end into the angle stop or shutoff valve, then connect the 3/8 compression female side to the faucet’s flexible supply hose. No special tools or complex procedures are required beyond standard plumbing wrenches. Packaged in a convenient pack of two, the Beduan Stainless Water Line Adapter provides flexibility for multiple installations or future upgrades. Whether you are replacing an old faucet, updating fixtures, or dealing with mismatched plumbing standards in an older home, this adapter offers a simple, reliable, and professional-grade connection solution.

What size faucet supply line does the 1/2" NPT male end connect to?

The 1/2" NPT male end (0.84" / 21.33 mm OD) is designed to screw into fittings or hoses that accept a 1/2" NPT male thread, such as many modern flexible faucet supply lines or adapters that use 1/2" NPT.

Can I use this to connect a new faucet to my old shutoff valve without replacing the valve?

Yes. This adapter is specifically designed to convert an older 3/8" compression shutoff valve outlet to a 1/2" NPT male connection so you can attach many modern faucet supply lines without changing the valve.

Is any special tool needed for installation?

No special tools are required beyond standard plumbing tools. Typically, you just need an adjustable wrench (or two wrenches) to tighten the connections securely. Do not overtighten to avoid damaging threads.

Does this adapter include any washers or sealing rings?

The adapter has a flat inside design on the compression side to seal properly against the valve. If your installation requires an additional washer or tape on the NPT side, you may use standard plumber’s tape on the threads as needed.

Can I use this adapter with PEX or plastic tubing?

This adapter is intended to connect a 3/8" compression shutoff valve to a 1/2" NPT threaded connection. If you are using PEX or plastic tubing, you may need appropriate PEX/plastic fittings in addition to this adapter.

Where is this adapter typically used in the plumbing setup?

It is usually installed directly on the angle stop (shutoff valve) under a kitchen or bathroom sink, converting the 3/8" compression outlet of the valve to a 1/2" NPT male connection for the flexible faucet supply hose.

This adapter made it easy to connect my new faucet to the existing water line and it has been leak free since installation

Solid stainless construction and the 3/8 to 1/2 conversion was exactly what I needed for my kitchen sink upgrade

I used these to hook up a bathroom faucet to an older shut off valve and the flat inside design sealed perfectly

Great little fittings, they saved me from having to replace the whole valve when I only needed a simple size reducer

Installation was straightforward, threads were clean, and both adapters tightened down without any drips

These worked perfectly to adapt my faucet supply hose to a 1/2 NPT outlet and they feel very durable

I was able to connect a new pull down kitchen faucet to my existing 3/8 line using these and everything fit snugly

The compression fitting grabbed the tubing well and I liked that the stainless steel will not rust in a damp cabinet

Used these adapters on both hot and cold lines in the bathroom and they solved my connection issues instantly

Good quality connectors that matched the description and made my faucet installation fast with no extra plumbing parts needed