Castair 3/8"x1/2" In-Tank Check Valve Compression Tube Fitting Inlet / NPT Outlet CTD3812
The Castair CTD3812 is a 3/8" x 1/2" in-tank check valve with compression tube fitting inlet and 1/2" NPT male outlet. At $20.33, this is the right part when 3/8" copper discharge tubing connects to the check valve, which then threads into a 1/2" tank bung — stepping up in size while transitioning from compression tube to threaded pipe in one valve body. Rated 500 PSIG and 400 degrees F with a 1/8" unloader port.
Technical Specifications
- Part Number: CTD3812
- Inlet Connection: 3/8" Compression tube fitting
- Outlet Connection: 1/2" NPT Male
- Pressure Rating: 500 PSIG
- Temperature Rating: 400 degrees F
- Unloader Port: 1/8" side port
- Price: $20.33
- Manufacturer: Castair (Spicer, Minnesota)
CTD3812 vs. CTB3812
- CTD3812 (this listing): Compression inlet — 3/8" copper tubing inserts and is clamped by compression fitting
- CTB3812: NPT female inlet — 3/8" male NPT fitting threads in from discharge side
CTD Series Reference
- CTD3838 — 3/8" comp x 3/8" NPT, $20.33
- CTD3812 — 3/8" comp x 1/2" NPT (this listing), $20.33
- CTD1212 — 1/2" comp x 1/2" NPT, $21.18
- 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?
We stock the full Castair check valve line. Call us with your compressor model or the dimensions of your discharge tube and tank connection and we'll confirm the correct replacement valve before it ships.
- Free shipping on qualifying orders to the lower 48
- Free tech support — fitment verification by phone
- Full manufacturer warranty on all Castair products
Call 866-217-0063 for quick answers and help!
