

JOHNDOW COMBINATION FLUID EVACUATOR AND OIL DRAIN (20 GAL)
Two Drains in One - JohnDow Fluid Evacuator and Oil Drain (JDI-20COMBO, 20 Gallon)
Combination Vacuum Extraction and Self-Evacuating Drain System
Handle any fluid service with this versatile 20-gallon combination unit. Switch between vacuum extraction for hard-to-reach fluids and traditional gravity draining through the 16-inch funnel. This all-in-one fluid evacuator eliminates the need for multiple drain units in your shop.

Key Benefits of This Combination Fluid Evacuator
Dual Function Versatility
Extract fluids from sealed transmissions and differentials using the powerful venturi vacuum system, then switch to gravity draining for standard oil changes. One unit handles both jobs, saving valuable shop space and equipment costs.
14-Gallon Vacuum Capacity
The venturi vacuum generator creates powerful suction using 110-115 PSI shop air. Extract up to 14 gallons of fluid through the 7-foot suction hose with included probes and adapters for various vehicle applications.
Heavy-Duty Steel Construction
Built with a 20-gallon steel tank and chemical-resistant wheels that withstand daily shop use. The adjustable height (50" to 70") and 16-inch offset funnel accommodate everything from low sports cars to lifted trucks.
Perfect for These Automotive Fluid Services
- Transmission fluid extraction through dipstick tubes
- Differential fluid removal from sealed units
- Standard engine oil changes using the gravity funnel
- Power steering fluid evacuation
- Coolant system draining and refilling
- Marine engine oil extraction
Technical Specifications
Tank Capacity | 20 Gallons |
---|---|
Vacuum Suction Capacity | 14 Gallons |
Required Air Pressure | 110-115 PSI |
Suction Speed | 0.04-0.05 GPM |
Funnel Size | 16" Offset Design |
Height Adjustment | 50" to 70" |
Wheels | 4" Front Casters, 7" Rear Fixed |
Weight | 62 lbs (72 lbs with bowl option) |
Included Accessories | 6 Suction Probes, 3 OE-Style Adapters, Storage Tube |
How to Use Your Combination Fluid Evacuator
For Vacuum Extraction:
- Connect shop air to create vacuum (110-115 PSI)
- Select appropriate probe or adapter from the 9 included options
- Insert probe into fluid reservoir and begin extraction
- Monitor fluid level through the convenient sight tube
For Gravity Draining:
- Position the 16-inch funnel under vehicle drain plug
- Adjust height from 50" to 70" as needed
- Remove drain plug and let fluid flow through expanded metal screen
- Use self-evacuation feature with 6-foot discharge hose when full
Upgrade to the Ultimate Fluid Management System
Why buy separate units when one fluid evacuator does it all? This JohnDow combination drain handles every fluid service job in your shop.
Get your JDI-20COMBO fluid evacuator and oil drain today!
Frequently Asked Questions
What fluids can I extract with this combination unit?
This fluid evacuator works with engine oil, transmission fluid, gear oil, power steering fluid, and coolant. The chemical-resistant components handle all automotive fluids safely. Always check fluid temperature before extraction (maximum 212°F for bowl option).
How does this compare to separate vacuum extractors and oil drains?
The JDI-20COMBO combines the features of dedicated units like the JDI-25HDC self-evacuating drain and JDI-20EV vacuum extractor. You get both functions in one space-saving unit, plus the convenience of using either method without switching equipment.
Do I need the bowl option (JDI-20COMBO-B)?
The 2-gallon transparent bowl option lets you check fluid quantity and quality before discharging into the tank. This helps identify contamination or verify fluid amounts for warranty documentation. The bowl adds 10 pounds but provides valuable inspection capability.
What's included with the probe and adapter kit?
You receive 6 different suction probes for various dipstick tube sizes, plus 3 OE-style adapters for manufacturer-specific applications. All probes store conveniently in the included on-board storage tube, keeping them organized and accessible.
Warranty Information
This JohnDow fluid evacuator includes a 1-year manufacturer warranty covering defects in materials and workmanship. JohnDow Industries stands behind their equipment with responsive customer support and readily available replacement parts.
When your shop needs maximum flexibility for fluid services, this combination fluid evacuator and oil drain delivers professional results. The JDI-20COMBO saves space, time, and money by combining two essential shop tools into one reliable unit.
About the Brand