1/2 inch x 3/8 inch Brass Compression Reducing Union Compression x Compression

1/2 inch x 3/8 inch Brass Compression Reducing Union – Lead-Free, Code-Compliant Transition Fitting

The 1/2 inch x 3/8 inch Brass Compression Reducing Union is engineered for dependable, leak-resistant connections between tubing of dissimilar sizes. Manufactured from lead-free brass, this fitting provides a corrosion-resistant solution for potable water lines and general plumbing transitions.

Key Performance Features

• Material: Forged lead-free brass compliant with federal and state potable water requirements
• Connection Type: Compression x Compression – no soldering required
• Size: 1/2 inch OD x 3/8 inch OD
• Use Case: Reducing transition for connecting tubing in water distribution, appliance hookups, and fixture lines
• Operating Conditions: Suitable for use with copper, PEX (with proper inserts), or plastic tubing in cold or hot water systems

Why Contractors Choose Compression Unions

• Field-Serviceable: Allows easy disassembly and reassembly without heat or specialized tools
• Leak Resistance: Brass ferrules compress evenly, providing a uniform seal under pressure
• Time-Saving Installation: No cure time—ideal for retrofit or tight-schedule plumbing work
• Lead-Free Compliance: Meets NSF/ANSI 61 and 372 for potable water systems

Installation Notes

To install, insert properly cut and deburred tubing into each side of the union. Hand-tighten the compression nuts, then complete installation using a pair of open-end wrenches to secure the connection. Avoid over-tightening to prevent ferrule deformation. No thread sealant is needed, as the compression ring creates a mechanical seal.

Typical Applications

Commonly used in kitchen and bath water supply lines, as well as connecting appliance tubing, the 1/2 inch x 3/8 inch reducing union is particularly useful in retrofit situations where existing pipe diameters differ. It’s also appropriate for low- to moderate-pressure systems carrying potable water or air.

Did You Know?

Federal legislation under the Safe Drinking Water Act now limits the lead content in plumbing components to 0.25%—making certified lead-free brass a legal requirement for any fitting in contact with drinking water.

The 1/2 inch x 3/8 inch Brass Compression Reducing Union offers the strength of forged brass, the flexibility of mechanical connections, and the compliance professionals rely on for code-approved installations. Designed for longevity and reliability in real-world jobsite conditions.