Castair 1/2 x 3/8" In-Tank Check Valve Compression Tube Fitting Inlet / Compression Fitting Outlet CTD1238
The Castair CTD1238 is a 1/2" x 3/8" in-tank check valve with compression tube fitting inlet and compression fitting outlet. At $25.41, this is a specialized configuration where both connections are compression fittings — used when both the incoming discharge tube and the downstream connection to the tank or manifold run copper tubing rather than threaded pipe. The inlet accepts 1/2" copper tubing; the outlet connects to 3/8" copper tubing or compatible compression fittings. Rated 500 PSIG and 400 degrees F with a 1/8" unloader port.
What Makes CTD1238 Unique
- Both compression connections: Unlike most in-tank check valves that thread directly into the tank bung via NPT male outlet, the CTD1238 outlet is also a compression fitting
- Size reduction: 1/2" inlet steps down to 3/8" outlet — used in configurations where the discharge tube is larger than the downstream connection
- Application: Specific Castair compressor builds where the check valve is plumbed in-line with copper tubing on both sides rather than threaded directly into the tank
Technical Specifications
- Part Number: CTD1238
- Inlet Connection: 1/2" Compression tube fitting
- Outlet Connection: 3/8" Compression fitting
- Pressure Rating: 500 PSIG
- Temperature Rating: 400 degrees F
- Unloader Port: 1/8" side port
- Price: $25.41
- Manufacturer: Castair (Spicer, Minnesota)
CTD Series Full Reference
- CTD3838 — 3/8" comp x 3/8" NPT, $20.33
- CTD3812 — 3/8" comp x 1/2" NPT, $20.33
- CTD1212 — 1/2" comp x 1/2" NPT, $21.18
- CTD1238 — 1/2" comp x 3/8" comp (this listing), $25.41
- CTD1234 — 1/2" comp x 3/4" NPT, $29.65
- CTD3434 — 3/4" comp x 3/4" NPT, $29.65
- CTD3410 — 3/4" comp x 1" NPT, $46.59
Why Buy From Air Compressor Factory Direct?
The CTD1238 is a specialty valve easy to order incorrectly without looking at your existing installation carefully. Call us with your compressor model and we'll confirm whether this is the right valve or whether a different combination fits your discharge assembly.
- Free shipping on qualifying orders to the lower 48
- Free tech support — fitment verification before you order
- Full manufacturer warranty on all Castair products
Call 866-217-0063 for quick answers and help!
