Castair CA1212 — 1/2" x 1/2" Compression Adaptor
The Castair CA1212 is a 1/2-inch x 1/2-inch compression fitting adaptor for air compressor discharge plumbing. At $13.09, this is a maintenance and installation part used when connecting or adapting 1/2-inch compression tube fittings in Castair compressor discharge lines, unloader plumbing, or shop air piping. Castair manufactures these adaptors to work with their compressor systems' discharge tube configurations.
Research note: Castair does not publish detailed spec sheets for individual fitting accessories on their public website. The specifications below are based on the product name and Castair's fitting naming conventions. Contact us to confirm the exact fitting configuration before ordering if you need a specific thread type or fitting style.
What This Fitting Is For
Compression adaptors serve specific purposes in air compressor plumbing:
- Discharge line connections: Connecting the pump discharge tube to tank check valves or piping with matching 1/2-inch compression fittings
- Unloader plumbing: Adapting compression tube connections in the pressure switch and unloader valve circuit
- Repair and maintenance: Replacing a damaged or corroded compression fitting adaptor in an existing Castair compressor installation
- Custom builds: Used when assembling a compressor from Castair components — pump, tank, check valve, and related plumbing
Compression Fitting Types — Context
Castair uses compression fittings throughout their discharge and unloader plumbing on commercial and industrial compressors. Compression fittings grip the tube using a ferrule (ring) that bites into the tube OD when the nut is tightened — no solder, no pipe dope required on the fitting itself. They work with copper and steel tubing of the matching OD. A 1/2 x 1/2 compression adaptor connects two 1/2-inch compression tube runs.
Related Castair Compression Fitting Adaptors
| Part # | Size | Price |
|---|---|---|
| CA1212 | 1/2" x 1/2" | $13.09 |
| CA3434 | 3/4" x 3/4" | $14.63 |
Related Check Valve Parts (for reference)
If you're looking for in-tank check valves with compression fittings, Castair's CTD-series check valves use compression fittings and include a 1/8" side port for unloader connections. The check valve part for 1/2 x 1/2 compression inlet is CTD1212 — a separate component from the CA1212 adaptor.
Installation Notes
- Designed for use with Castair compressor discharge tube plumbing
- Verify tube OD matches the fitting compression size before ordering
- Compression fittings require proper tube preparation — square cut, clean, without burrs
- Tighten to hand-tight plus 1.25 turns — over-tightening can damage the ferrule
- If you're replacing a leaking compression fitting, check the tube end for damage before reusing the fitting
Why Buy From Air Compressor Factory Direct?
We stock Castair compressor parts and accessories including fittings, check valves, and plumbing components. Free shipping on qualifying orders. Free tech support at 866-217-0063. If you're not sure which fitting you need for your Castair compressor, call us and we'll help you identify the correct part.
Call 866-217-0063 for quick answers and help!
