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Description
For tradies who move fast: the Mastercool 90058-A is a cordless, 2-stage, 1.5 CFM vacuum pump built for real Aussie job sites. It’s compact, Makita-battery ready (adapter sleeve) and pulls down hard so you can charge with confidence—no leads, no dramas.
Key Features & Trade Benefits
- 1.5 CFM, 2-Stage Pump — Deep, stable evacuation for faster moisture removal and fewer call-backs.
- 15-Micron Ultimate Vacuum — Pulls down to spec for modern systems so your charge holds, fair dinkum.
- Cordless 18V Platform — Run it off an 18V Li-ion with adapter sleeve; work roof-to-roof without hunting for power.
- Oil Mist-Free Exhaust — Built-in separator keeps the jobsite and van tidy; less clean-up, more billable time.
- Air-Cooled Motor + Sure-Grip Handle — Keeps its cool on hot days; easy carry up ladders and through tight access.
- Reinforced, Shock-Resistant Base — Built to cop daily knocks so the pump stays square and seals stay happy.
- Clear Sight Glass & Easy Drain — Quick oil checks and changes so you maintain vacuum performance.
Why This Pump Matters on Real Jobs
On a 40-degree roof in Brisbane, dragging a lead and dodging trip hazards is a pain. With the 90058-A you’re cordless, quicker to setup, and pulling to microns in minutes. One contractor told us he shaved 15–20 minutes off each split install—no worries—just by ditching the extension cord and using short, vacuum-rated hoses. That’s proper productivity.
Want to compare options across the range? Browse our Vacuum Pumps collection for 2-stage, single-stage and service-specific picks.
Pro Tip
Use a short, large-diameter vacuum hose and a core removal tool for best flow. Pair the pump with a micron gauge to verify a stable vacuum before break-seal. It’s the easiest way to reduce moisture-related call-backs and come off the roof sooner.
Compatibility & Systems
- Works for evacuation on common refrigerants used in AU: R32, R410A, R134a, and more.
- Battery platform: 18V Li-ion via adapter sleeve (Makita-style fitment).
- Ports: 1/4" SAE (kit variants may include 1/2" ACME adapter).
Built for Aussie Conditions
Hot tin roofs in Perth, humid plant rooms in Brisbane—this unit’s air-cooled motor and rugged base are a ripper combo for tough days on the tools.
What’s Included
- Mastercool 90058-A Cordless Vacuum Pump (tool only)
- Adapter sleeve (model dependent)
- User instructions
Specifications
| No. of Stages | 2 |
| Free Air Displacement | 1.5 CFM |
| Ultimate Vacuum | 15 microns (≈ 3 Pa) |
| Motor | DC 18V, 90 W |
| Oil Capacity | ~3.5 oz |
| Dimensions (w/o battery) | 9.9 × 3.7 × 6.1 in |
| Weight | 7.9 lb (≈ 3.6 kg) |
| Battery (not included) | 18V Li-ion (via adapter sleeve) |
| Port | 1/4" SAE (some kits add 1/2" ACME) |
Warranty & Returns
Manufacturer’s warranty: 12-month Mastercool limited warranty against defects in materials and workmanship (registration and proof of purchase may be required). Returns follow our standard HVAC Shop policy—if anything’s not right, reach out and we’ll sort it. She’ll be right.
FAQs
Will my Makita 18V battery fit?
Yes, the 90058 series uses an adapter sleeve designed for 18V Li-ion battery fitment (Makita-style). See the adapter sleeve detail on product variants.
Do I still need a micron gauge?
Absolutely. Use a dedicated micron gauge to confirm a deep, stable vacuum before charging. It’s the quickest way to prevent moisture-related call-backs.
Is it suitable for R32 systems?
Yes — evacuation is independent of refrigerant charge. Always follow AU refrigerant handling rules and safety procedures when working with A2L gases.
Related Products (hand-picked)
- Vacuum Pump Oil 946 ml — keep your pump sealing tight and reaching spec vacuums.
- Fieldpiece SVG3 Micron Gauge — verify your target microns and hold-test properly.
- Valve Core Removal Tool (1/4" SAE) — remove cores for max flow and faster pull-down.
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