Brass Compression Reducing Union — Tube OD Fitting
The Brass Compression Reducing Union joins two tubes of different outside diameters into one leak-tight, fully serviceable connection — no soldering, threading, or special tools required. Machined from solid brass, it's a dependable, economical choice for adapting tube sizes in pneumatic, instrumentation, water, and general industrial lines.
Key specifications
- Style: Reducing union, compression x compression
- Body material: Solid brass
- Connection: Tube OD compression on both ends (nut and sleeve/ferrule included)
- Compatible tubing: Copper, aluminum, and thermoplastic — not recommended for steel tubing
- Service: Low- to medium-pressure applications without excessive vibration or tube movement
- Standards: Meets applicable ASA, ASME, and SAE specifications
- Available tube-OD reductions: 1/4" down to 7/8" x 3/8"
Typical applications
Connecting mismatched tube sizes in compressed-air drops, instrumentation and control lines, coolant and water lines, fuel and oil lines, and equipment plumbing where a clean, reusable compression seal is preferred over soldered or flared joints.
This brass compression reducing union delivers a strong, corrosion-resistant, leak-free transition between two tube outside diameters. Select your exact reduction from the size options above — from 1/4" x 1/8" up to 7/8" x 5/8" — for copper, aluminum, and poly tubing systems.
NOTE: Actual product may be different from pictured!
Financing Options
Financing Options
We offer Financing Through Many Different Avenues:
- Affirm is great for smaller purchases. You can do this during checkout.
- Clicklease is a great option for Instant decisions up to 25k. NO Hard credit pull. No Time in Business Required. More information can be found out about it here: https://www.clicklease.com/partner/warthog-air-compressor-store
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