Castair 3/4"x1" In-Tank Check Valve Compression Tube Fitting Inlet / NPT Outlet CTD3410
The Castair CTD3410 is the largest check valve in the CTD compression inlet series — 3/4" compression tube fitting inlet, 1" NPT male outlet. At $46.59, this is a heavy-duty valve for large industrial reciprocating compressors where 3/4" copper discharge tubing connects to a check valve that then threads into a 1" NPT tank bung. One valve body handles both the compression tube connection and the step-up to the larger tank port. Rated 500 PSIG and 400 degrees F with a 1/8" unloader port.
Technical Specifications
- Part Number: CTD3410
- Inlet Connection: 3/4" Compression tube fitting
- Outlet Connection: 1" NPT Male
- Pressure Rating: 500 PSIG
- Temperature Rating: 400 degrees F
- Unloader Port: 1/8" side port
- Price: $46.59
- Manufacturer: Castair (Spicer, Minnesota)
When You Need CTD3410
- 3/4" copper discharge tubing runs from the compressor head
- Tank has a 1" NPT female bung
- Need one valve body to handle both the compression tube connection and the size step-up
- Typical on large reciprocating compressors in the 7.5-15 HP range where Castair builds with this specific tube/tank configuration
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, $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 (this listing), $46.59
Why Buy From Air Compressor Factory Direct?
Large-bore check valves at this size and configuration are precision replacement parts. We carry the full Castair check valve line and can confirm CTD3410 is the right part for your installation before it ships. Call with your compressor model or discharge tube and tank dimensions.
- Free shipping on qualifying orders to the lower 48
- Free tech support — fitment confirmation before you order
- Full manufacturer warranty on all Castair products
Call 866-217-0063 for quick answers and help!
