Robinair VacuMaster™ 15151-S2 is a compact 1.5 CFM (35 L/min), two-stage rotary vane vacuum pump built for fast, reliable evacuations. Ideal for techs who want a light, van-friendly unit that still pulls a solid deep vacuum and cuts job time. Fair dinkum handy when you’re moving from site to site.

Key features & trade benefits

• Two-stage design — pulls a deeper ultimate vacuum than single-stage, helping you dry the system properly and reduce call-backs.
• High-torque motor — easy start-up and steady evacuation on tough days.
• Angled oil drain + front fill + sight glass — clean, quick oil changes so you’re back on the gauges faster.
• Die-cast aluminium housing — lightweight but tough for daily service work.
• Dual inlets (1/4″ MFL & 3/8″ ACME with 3/8″ FFL × 1/2″ ACME adapter)
• Factory micron rating ~50 microns — proven deep-vac performance when paired with good hoses and fresh oil.

Why this pump matters on real jobs

Roof in Western Sydney, arvo heat bouncing off the tin. You need to evacuate a split fast and get off the ladder. The VacuMaster 15151-S2 is light to carry, sets up quick, and the angled drain makes oil swaps painless. You pull down to spec, log your microns, and you’re packing up before knock-off. She’ll be right.

Rounding out your evacuation kit? Check our Vacuum Pumps & Accessories for hoses, oils and micron gauges.

Pro tip

Warm, fresh pump oil pulls deeper. If your micron reading stalls, isolate the system, crack the gas ballast for a short purge, then reseal and continue. Swap the oil if it’s cloudy — cheapest performance upgrade you’ll buy. No worries.

Compatibility & system info

• Use cases: Domestic splits, light commercial service, automotive A/C, small refrigeration.
• Best practice: Use 3/8″ vacuum hose and a vacuum-rated core removal tool for faster evacuation and accurate micron verification.

Built for Aussie conditions

From humid Brisbane plant rooms to summer roofs in Sydney, the compact chassis and directed exhaust help keep the job moving when it’s scorching.

What’s included

• 1 × Robinair VacuMaster™ 15151-S2 two-stage vacuum pump

Specifications

Warranty & returns

12-month warranty. For returns and delivery details, see Shipping & Returns. Work must comply with Australian refrigerant handling rules (licensed techs only).

FAQs

Is 1.5 CFM enough for split installs?
Yes for domestic splits and light commercial when paired with large-bore hoses and a core removal tool. For larger systems, consider higher-CFM models.

What fittings does it have?
1/4″ MFL and 3/8″ ACME ports, plus a 3/8″ FFL × 1/2″ ACME adapter for flexibility.

How do I hit 50 microns in the field?
Use 3/8″ vacuum hose, remove valve cores, keep oil fresh, and measure at the system with a calibrated micron gauge.

Related products

• Keep Robinair pump oil on hand — warm, fresh oil pulls deeper and faster.
• Add a micron gauge — verify deep vacuum and reduce call-backs.
• Upgrade to a 3/8″ evacuation hose — bigger bore = quicker evacuation.