Castair 3/4"x3/4" In-Tank Check Valve Compression Tube Fitting Inlet / NPT Outlet CTD3434
The Castair CTD3434 is a 3/4" x 3/4" in-tank check valve with compression tube fitting inlet and 3/4" NPT male outlet. At $29.65, it's used when 3/4" copper discharge tubing connects to the check valve, which then threads into the 3/4" NPT tank bung. The compression inlet secures the copper tube without threading; the NPT male outlet threads directly into the tank connection. Rated 500 PSIG and 400 degrees F with a 1/8" unloader port.
Technical Specifications
- Part Number: CTD3434
- Inlet Connection: 3/4" Compression tube fitting
- Outlet Connection: 3/4" NPT Male
- Pressure Rating: 500 PSIG
- Temperature Rating: 400 degrees F
- Unloader Port: 1/8" side port
- Price: $29.65
- Manufacturer: Castair (Spicer, Minnesota)
CTD3434 vs. CTB3434
- CTD3434 (this listing): Compression tube fitting inlet — 3/4" copper tubing inserts into the inlet and is secured by a compression nut and sleeve. Use when discharge runs copper tubing.
- CTB3434: NPT female inlet — a male NPT fitting threads into the valve inlet. Use when discharge uses threaded pipe fittings.
Both connect to the tank via 3/4" NPT male outlet. The only difference is how the discharge side connects to the valve.
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 (this listing), $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 and can help you identify whether you need the compression inlet (CTD) or NPT female inlet (CTB) version. Call with your existing valve or compressor model for a quick fitment confirmation.
- Free shipping on qualifying orders to the lower 48
- Free tech support — fitment help by phone
- Full manufacturer warranty on all Castair products
Call 866-217-0063 for quick answers and help!
