Key Features
How The CASTAIR Replacement Pump Compares To Other Replacement Pump Options
Shop owners and equipment techs rebuilding a compressor usually face this question: should I get a generic aftermarket pump, a standard OEM-style replacement, or invest in the CASTAIR pump built to match industrial-grade compressor standards?
| Feature | Generic Aftermarket Pump | Standard OEM-Style Pump | CASTAIR Replacement Pump |
|---|---|---|---|
| Cylinder Configuration | Twin cylinder, single or two-stage | Four cylinder, two-stage | V4 cylinder, two-stage |
| Flywheel Diameter | Varies, often smaller | 18 in | 19.0 in outside diameter |
| Compatibility With CASTAIR Units | Not guaranteed | Not guaranteed | Purpose-built for CASTAIR compressor platforms |
| Price | $600-$900 | $900-$1,300 | $2,599 |
Product Description
How The CASTAIR Replacement Pump Compares To Other Replacement Pump Options
Shop owners and equipment techs rebuilding a compressor usually face this question: should I get a generic aftermarket pump, a standard OEM-style replacement, or invest in the CASTAIR pump built to match industrial-grade compressor standards?
Here's the honest comparison:
| Feature | Generic Aftermarket Pump ($600-$900) | Standard OEM-Style Pump ($900-$1,300) | CASTAIR Replacement Pump ($2,660) |
|---|---|---|---|
| Cylinder Configuration | Twin cylinder, single or two-stage | Four cylinder, two-stage | V4 cylinder, two-stage |
| Construction | Cast iron or mixed materials | Cast iron | Cast iron |
| Oil Capacity | Varies, often smaller | 1.5-2 quarts | 2-quart oil capacity |
| Flywheel Diameter | Varies, often smaller | 18" | 19.0" outside diameter |
| Horsepower Rating | 5-7.5 HP | 7.5-10 HP | 7.5-10 HP |
| Build Consistency | Variable across batches | Generally consistent | Built to match CASTAIR industrial compressor standards |
| Compatibility With CASTAIR Units | Not guaranteed | Not guaranteed | Purpose-built for CASTAIR compressor platforms |
| Sourcing | Overseas generic import | Branded aftermarket | Matched to CASTAIR's industrial engineering standards |
Why The CASTAIR Replacement Pump Is Worth The Investment
This isn't just a replacement pump, it's built to the same industrial standards as CASTAIR's complete compressor lineup, giving shop owners a pump that matches the performance and durability of the original equipment.
The CASTAIR pump specifically addresses the needs of shop owners and equipment techs rebuilding or upgrading a compressor who want a pump they can trust to perform like the industrial-grade units it was engineered alongside.
Built To Industrial Standards, Not Generic Specs. The V4 cylinder, two-stage design with a 19.0-in. flywheel and 2-quart oil capacity mirrors the engineering found in CASTAIR's complete industrial compressor line, giving buyers confidence that the pump is built for real workload demands, not just a generic fit.
Engineered For Compatibility And Performance
The V4 cylinder two-stage configuration is designed for motors operating at 7.5-10 HP, matching a wide range of shop compressor setups
The 19.0-in. outside diameter flywheel is sized to work with common industrial compressor tank configurations
The 2-quart oil capacity supports proper lubrication for sustained, heavy-duty operation
Real Savings
Rebuilding with a quality pump avoids the cost of replacing an entire compressor unit when only the pump has failed
A pump built to industrial standards reduces the risk of premature failure common with generic aftermarket options
Matching the pump to CASTAIR's engineering standards reduces compatibility issues during installation
Free shipping and no sales tax through Summit Forge Supply keeps the total cost down compared to buying elsewhere and paying tax and freight separately
The Bottom Line Shop owners and equipment techs rebuilding a compressor can't afford a generic pump that doesn't hold up to real workload demands. The CASTAIR Replacement Pump is built to the same industrial engineering standards as CASTAIR's complete compressor line, so it delivers dependable performance in a rebuild or upgrade. For anyone keeping a shop compressor running at full capacity, this is the pump built to match the job.
- For use with 5-7.5HP motors
- Two stage pump with V4 cylinder
- 2 quart oil capacity
- 19.0-In. outside diameter flywheel
Full Spec Sheet
| Model | GWG311296 |
| Motor Compatibility | 7.5-10 HP |
| Pump Stage | Two-stage, reciprocating |
| Cylinders | 4, V-style configuration |
| Oil Capacity | 2 quart |
| Flywheel | 19.0 in outside diameter |
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