John Dow JDI-20COMBO Fluid Evacuator and Oil Drain - 20 Gallon
SKU: JDI-20COMBO
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JohnDow JDI-20COMBO Combination Fluid Evacuator and Oil Drain Overview
You're stocking two machines for one job. A vacuum extractor for sealed transmissions and differentials, then a separate oil drain for everything else. The JohnDow JDI-20COMBO combination fluid evacuator and oil drain puts both jobs on one 20-gallon steel tank, so you free up floor space and stop juggling equipment between fluid services.
Switch to vacuum mode and the venturi system pulls fluid through a 7-foot suction hose using shop air you already have running. Switch to gravity mode and the 16-inch offset funnel handles standard oil changes the way you're used to. One tank, one wheel base, two ways to move fluid.
The height adjusts from 50 inches to 70 inches, so the same unit rolls under a lowered sports car or up to a lifted truck without a second cart in the shop.
Key Features & Benefits
| Dual Function Design | Extract sealed transmission and differential fluid, then switch to gravity draining for standard oil changes on the same unit. |
| 14-Gallon Vacuum Capacity | Pull fluid through the suction hose without stopping mid-job to empty the tank. |
| Shop-Air Powered Venturi | Runs off 110 to 115 PSI shop air, so there's no separate vacuum pump to maintain. |
| 6 Probes and 3 OE-Style Adapters | Covers a wide range of dipstick tubes and reservoir openings without hunting for the right fitting. |
| Adjustable 50" to 70" Height | Rolls under low sports cars and up to lifted trucks with the same unit. |
| Self-Evacuating Discharge | Empty a full tank through the 6-foot discharge hose without lifting or tipping the unit. |
| Heavy-Duty Steel Tank and Casters | Built for daily shop rolling and repeated fluid service, not occasional use. |
Specifications
| Model | JDI-20COMBO |
| 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) |
What's Included
- 20-Gallon Steel Tank
- 6 Suction Probes
- 3 OE-Style Adapters
- Storage Tube
- 7-Foot Suction Hose
- 6-Foot Self-Evacuation Discharge Hose
- 16-Inch Offset Funnel
- Fluid Level Sight Tube
Applications
Extract fluid through dipstick tubes on sealed transmissions without dropping a pan.
Pull fluid from sealed differentials where a drain plug alone won't cut it.
Use the gravity funnel for routine engine oil services, no vacuum needed.
Evacuate power steering reservoirs cleanly with the right probe from the kit.
Handle coolant system service on the same unit you use for oil.
Pull oil from marine engines where deck access rules out a drain pan.
Installation & Setup
For vacuum extraction, connect your shop air at 110 to 115 PSI, pick the probe or adapter that matches the reservoir you're working on, insert it, and start pulling fluid. The sight tube lets you watch the level as the tank fills so you're not guessing when it's done.
For gravity draining, roll the unit into position, adjust the height to match the vehicle, and pull the drain plug. Fluid runs through an expanded metal screen into the funnel. Once the tank's full, the self-evacuation feature pushes fluid out through the 6-foot discharge hose so you're not lifting a 20-gallon tank to empty it.
Warranty
This JohnDow fluid evacuator carries a 1-year manufacturer warranty covering defects in materials and workmanship.
Warranty registration may be required after purchase. Refer to included documentation for details.
Questions Before You Order?
Call us at (855) 498-2147
Frequently Asked Questions
What fluids can I extract with this combination unit?
The JDI-20COMBO handles transmission fluid, differential fluid, engine oil, power steering fluid, coolant, and marine engine oil, covering both vacuum extraction and gravity draining on one 20-gallon unit.
How does this compare to running separate vacuum extractors and oil drains?
Instead of two machines, you get one 20-gallon tank that switches between a 14-gallon vacuum extraction mode for sealed transmissions and differentials and a gravity funnel for standard oil changes, which cuts down on shop floor space and equipment count.
What's included with the probe and adapter kit?
You get 6 suction probes and 3 OE-style adapters, plus a storage tube to keep them organized, covering a range of dipstick tubes and reservoir openings.
Do I need shop air to run the vacuum extraction?
Yes. The venturi vacuum system needs 110 to 115 PSI of shop air to generate suction for the extraction side of the unit.
Will this work under both low cars and lifted trucks?
The unit height adjusts from 50 inches to 70 inches, so it rolls under lowered sports cars and up to lifted trucks without needing a separate cart.
How do I empty the tank once it's full?
The self-evacuation feature pushes fluid out through a 6-foot discharge hose once the 20-gallon tank fills, so you're not tipping or lifting it to empty.
About the Brand