The Castair VA150 is a 1-1/2" NPT Male x 18" metal flex hose for larger air compressor installations. The 1-1/2" NPT port size places this hose at the upper end of the piston compressor range and into the lower range of larger rotary installations — think 15-25 HP two-stage piston units and equivalent rotary compressors. This is the vibration isolator and flexible connection between your pump outlet and tank inlet, handling the movement and thermal cycling that comes with continuous shop use.
What Makes This Size Necessary
As compressors scale up in horsepower, discharge port sizes increase to accommodate higher CFM output. A 1-1/2" NPT discharge is common on larger piston compressors and some mid-size rotary units. Using a smaller flex hose creates backpressure and flow restriction at the outlet — the compressor works harder to push air through an undersized connection. The VA150 maintains the correct 1-1/2" flow path from pump to tank without restriction.
Key Features
- 1-1/2" NPT Male Connection: Both ends, for direct connection to 1-1/2" NPT pump outlets and tank fittings
- 18" Length: Standard installation length — sufficient to absorb pump vibration and accommodate minor alignment differences
- Stainless Braided Flex Construction: Rated for compressed air service at shop compressor operating pressures
- OEM Castair Part: Factory-specification for Castair compressors with 1-1/2" NPT discharge connections
- Vibration Isolation: Decouples pump from tank to protect fittings, check valves, and downstream hardware
When to Replace This Hose
- Visible corrosion, rust staining, or fraying in the stainless braid
- Air leak or seepage at either NPT fitting
- Kinking or permanent deformation from installation or impact
- Hose has become rigid and no longer absorbs vibration effectively
- Compressor has been running without a flex hose and you're converting to a correct installation
- Scheduled replacement on a high-use shop compressor — these hoses are wear items
Note on VA050 vs. VA150
Both VA050 ($46.59) and VA150 ($111.80) are listed as 1-1/2" NPT flex hoses in the Castair lineup. There may be differences in material specification, pressure rating, or construction quality between these two part numbers at this size. Contact us if you need clarification on which is the correct replacement for your specific Castair compressor model — we can check against the compressor's parts manual.
Full Flex Hose Lineup
- VA075 ($59.29) — 3/4" NPT Male x 18"
- VA100 ($99.95) — 1" NPT Male x 18"
- VA050 ($46.59) — 1-1/2" NPT x 18"
- VA125 ($102.49) — 1-1/4" NPT x 18" — 25-40 HP rotary
- VA150 ($111.80) — 1-1/2" NPT Male x 18" (this part)
- VA200 ($131.29) — 2" NPT Male x 18"
- VA100J36 ($203.28) — 1" JIC Female/Female x 36"
What's in the Box
- 1x Castair VA150 Metal Flex Hose — 1-1/2" NPT Male x 18"
Technical Specifications
- Part Number: VA150
- Manufacturer: Cast Air / Castair
- Connection Type: 1-1/2" NPT Male, both ends
- Length: 18 inches
- Category: Ball Valves / Flex Lines — Parts
- Price: $111.80
Pressure rating and full material specifications were not confirmed from manufacturer data at time of writing. Contact us for compatibility confirmation with your specific compressor model.
Why Buy From Air Compressor Factory Direct?
- Castair Parts Specialist: We stock the complete Castair flex hose range and can confirm the correct part for your installation
- Free Shipping: On qualifying orders to the contiguous US
- Free Tech Support: Call 866-217-0063 to confirm which 1-1/2" hose — VA050 or VA150 — is correct for your Castair unit
- OEM Quality: Factory-specification Castair replacement parts
- Full Manufacturer Warranty: Backed by Castair's standard warranty
Call 866-217-0063 for quick answers and help!
