Castair CA3434 — 3/4" x 3/4" Compression Adaptor
The Castair CA3434 is a 3/4-inch x 3/4-inch compression fitting adaptor for air compressor discharge plumbing. At $14.63, this is a plumbing component used in Castair compressor discharge lines, check valve installations, and shop air piping where 3/4-inch compression tube connections are required. The 3/4-inch size is common on larger commercial and industrial Castair compressors where higher CFM output requires larger-bore discharge tubing.
Research note: Castair does not publish detailed spec sheets for individual fitting accessories on their public website. Contact us to confirm the correct fitting for your specific Castair compressor model.
What This Fitting Is For
- Discharge plumbing: Connecting 3/4-inch compression tube runs in pump discharge or tank inlet plumbing
- Larger compressor applications: 3/4-inch fittings are typically used on commercial and industrial compressors with higher CFM output where the larger bore reduces flow restriction
- Check valve installation: Works with Castair's CTD3434 in-tank check valve (3/4 x 3/4 compression) for tank discharge connections
- Maintenance and repair: Replacement for damaged or leaking 3/4-inch compression adaptors in existing installations
Compression Fitting Basics
Castair uses compression fittings on their copper discharge tubes and unloader plumbing because they're reliable, leak-free, and serviceable without special tools. Compression fittings use a ferrule (sleeve) that bites into the tube OD when tightened, creating a positive seal on copper or steel tubing. The CA3434 adaptor connects two 3/4-inch compression tube ends.
Related Castair Compression Adaptors
| Part # | Size | Price |
|---|---|---|
| CA1212 | 1/2" x 1/2" | $13.09 |
| CA3434 | 3/4" x 3/4" | $14.63 |
Related Check Valves with Compression Fittings
Castair's in-tank check valves use compression fittings rated for 500 PSIG at 400°F with a 1/8-inch side port for unloader connections. The matching check valve for 3/4-inch compression is CTD3434. If you're replacing a check valve rather than just an adaptor, you likely need the CTD3434.
Installation Notes
- Verify your tube OD is 3/4-inch — measure the actual tube, not the pipe thread size
- Compression fittings require square-cut, burr-free tube ends for proper sealing
- Hand-tight plus 1.25 turns is the standard torque for copper tube compression fittings
- Inspect the tube end for corrosion or deformation before installing a replacement fitting
Why Buy From Air Compressor Factory Direct?
We stock Castair compressor parts and accessories and can help you identify the correct fitting for your application. Free shipping on qualifying orders. Free tech support at 866-217-0063. Full manufacturer warranty.
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