Castair Repair Kit — 1/2" x 1/2" 90-Degree NPT Flare Fitting, DD/PK/PP Units, Part 2414025K
The Castair 2414025K is the repair kit for the 1/2" x 1/2" 90-degree NPT flare fitting used on Castair DD, PK, and PP series compressor units. At $8.47, this kit gives you the seals, seats, or replacement components needed to restore a leaking or failed flare fitting connection without replacing the entire fitting assembly.
Flare fitting connections at 90-degree elbows are common leak points on air compressors — the fitting sees both pressure stress and mechanical stress from vibration and thermal cycling. When you find a leak at one of these connections, the correct response is a proper repair with the right kit rather than wrapping threads in tape and hoping it holds. The 2414025K contains what you need for a lasting repair on the specific fitting configuration used in these Castair unit types.
Kit Details
- Part Number: 2414025K
- Fitting Type: 90-degree NPT to flare
- Fitting Size: 1/2" x 1/2"
- Compatible Unit Types: DD (duplex), PK, and PP series Castair compressors
- Manufacturer: Cast Air (Castair)
- Price: $8.47
NPT Flare Fittings — What They Are and Why They Leak
A flare fitting creates a metal-to-metal seal using a conical flare at the end of a tube pressed against a matching conical seat in the fitting body. NPT (National Pipe Taper) threads are the connection between the fitting and the threaded port. The 90-degree configuration changes the flow direction at the connection point.
- Common failure mode — flare seat wear: Repeated assembly/disassembly or excessive torque can damage the flare seat, preventing a complete seal
- Common failure mode — nut/ferrule wear: The compression nut and ferrule that create the flare seal can wear or crack over time, especially with vibration
- Common failure mode — contamination: Debris or scale on the flare seat or mating surface prevents a complete seal even with correct torque
DD, PK, and PP Unit Compatibility
This repair kit is specifically designed for the fitting configuration used in Castair DD (duplex), PK, and PP series units. The fitting dimensions and kit contents are matched to these unit types. Using the correct kit ensures the replacement components are the right material, size, and configuration for the fitting.
- DD units: Duplex compressor configurations
- PK units: Castair PK series compressors
- PP units: Castair PP series compressors
If you are not certain whether your Castair compressor is a DD, PK, or PP unit, check the model plate on the compressor or call us with the model number — we can confirm the correct repair kit.
When Does a Shop Need This Kit?
- Leak at a 90-degree fitting on the compressor: If you have identified a leak at a 1/2" 90-degree elbow fitting on a DD, PK, or PP unit, this kit contains the repair components
- After a fitting is disturbed during other service: Moving a fitting connection for pump or motor service can damage the flare seat — have the repair kit on hand before you start the work
- Preventive stocking: At $8.47, keeping one or two of these kits on the shelf means a fitting leak does not turn into a compressor-down situation while you wait for parts to arrive
Technical Specifications
- Part Number: 2414025K
- Manufacturer: Cast Air (Castair)
- Fitting Size: 1/2" x 1/2"
- Fitting Configuration: 90-degree NPT to flare
- Compatible Units: DD, PK, PP series Castair compressors
- List Price: $8.47
Note: Manufacturer product page data was not available at time of writing. Specifications are derived from the product name and part number. Contact us to confirm fit for your specific Castair compressor model before ordering.
Why Buy From Air Compressor Factory Direct?
We have specialized in air compressor parts and equipment since 2016. OEM Castair repair kits are part of our regular inventory. When you call us with your compressor model and the location of the leak, we can confirm whether the 2414025K is the right kit or whether a different fitting size applies to your specific unit.
- Free shipping on qualifying orders
- Free tech support: Call 866-217-0063 to confirm the right repair kit for your compressor
- Full manufacturer warranty on all Castair parts
- Honest guidance: We will match the right kit to your specific fitting failure
Call 866-217-0063 for quick answers and help!
