304 Stainless Steel Compression Reducing Connector | A2 Push-Fit Tube Reducer

Measure the outer diameter (OD) of both tubes you need to join. The size format is Φ[larger OD]mm–Φ[smaller OD]mm. For example, Φ10mm–Φ6mm connects a 10mm (≈3/8\u201d) tube to a 6mm (≈1/4\u201d) tube. Always measure the tube OD with calipers — do not rely on nominal pipe size, which can differ from actual OD.

Quick inch reference: 4mm ≈ 5/32\u201d | 6mm ≈ 1/4\u201d | 8mm ≈ 5/16\u201d | 10mm ≈ 3/8\u201d | 12mm ≈ 1/2\u201d | 14mm ≈ 9/16\u201d | 16mm ≈ 5/8\u201d

A2 304 stainless steel compression fittings generally handle working pressures up to approximately 150 PSI (≈10 bar) for water and pneumatic applications. The exact rating depends on tube wall thickness and the specific size selected. Contact us to confirm the rating for your application before installation in high-pressure systems.

Yes. A2 304 stainless steel offers strong resistance to rust, oxidation, and mild corrosion, making these connectors suitable for outdoor plumbing, damp workshop settings, and light-industrial environments. For highly saline or chemical-heavy environments, A4 316 stainless steel is typically recommended instead.

These fittings are designed for metric OD tubing and are generally compatible with copper, brass, nylon, and polyethylene (PE) tubes of the corresponding outer diameter. They follow standard compression fitting geometry used in European and metric plumbing systems. Always verify the tube OD matches the fitting size before ordering.

In most cases, only a standard wrench or spanner is needed. Compression fittings work by tightening a nut that compresses an olive (ferrule) onto the tube — no soldering, gluing, or crimping tools required. This makes them a practical choice for DIY plumbing repairs and pneumatic line work.

Compression fittings can generally be loosened and repositioned during initial installation. However, once the olive has been fully compressed onto the tube, reuse on a different tube is not recommended — the olive deforms to create the seal and will not form a reliable seal on a new tube. A replacement olive is typically required for a new connection.

A compression fitting uses a nut and olive that are mechanically tightened with a wrench to grip the tube — it is more permanent and generally rated for higher pressures. A push-fit (push-to-connect) fitting uses an internal collet and O-ring that grip the tube when inserted, allowing tool-free installation and easier disconnection. These connectors are compression-type fittings.

Measure the tube OD with calipers. If the measurement is a round metric number (6mm, 8mm, 10mm, 12mm, etc.) your system is likely metric. If it falls on a fractional inch value (1/4\u201d, 3/8\u201d, 1/2\u201d, etc.) it may be imperial. Note that some nominal imperial sizes have ODs that are close to — but not identical to — metric sizes, so always verify with a direct measurement before ordering.