Castair 1-1/4"x1-1/4" In-Tank Check Valve NPT Female Fitting Inlet / NPT Male Outlet CTB114114
The Castair CTB114114 is a 1-1/4" x 1-1/4" in-tank check valve for large commercial and industrial reciprocating compressor installations. It carries the same 500 PSIG pressure rating and 400 degree F temperature rating as the entire Castair in-tank check valve line, with a 1/8" side port for unloader connection. This valve sits between the CTB1010 (1") and CTB112112 (1-1/2") in the lineup and is the correct replacement for compressors with 1-1/4" NPT discharge and tank connections.
Technical Specifications
- Part Number: CTB114114
- Inlet Connection: 1-1/4" NPT Female
- Outlet Connection: 1-1/4" NPT Male
- Pressure Rating: 500 PSIG
- Temperature Rating: 400 degrees F
- Unloader Port: 1/8" side port
- Manufacturer: Castair (Spicer, Minnesota)
- Price: Contact us for current pricing
What This Valve Does
- Prevents tank backflow: Closes when the compressor unloads or shuts down, holding tank pressure
- Unloader function: The 1/8" side port connects to the pressure switch unloader, venting head pressure at shutdown so the motor restarts without fighting full tank pressure
CTB Series Sizing Reference
- CTB3812 — 3/8" x 1/2", $21.18
- CTB1212 — 1/2" x 1/2", $20.33
- CTB1234 — 1/2" x 3/4", $29.65
- CTB3434 — 3/4" x 3/4", $31.34
- CTB1010 — 1" x 1", $50.82
- CTB114114 — 1-1/4" x 1-1/4" (this listing, call for price)
- CTB112112 — 1-1/2" x 1-1/2" (call for price)
Sizing Guidance
- Use CTB114114 when your compressor head has a 1-1/4" NPT male discharge port and your tank bung is 1-1/4" NPT
- If discharge is 1" and tank is 1-1/4", or other asymmetric combination, call us — we can determine the right valve or adapter approach for your configuration
- For 1-1/2" connections throughout, move to CTB112112
Why Buy From Air Compressor Factory Direct?
We stock Castair's full check valve line. Call with your compressor model and thread sizes and we'll confirm the correct part number 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!
