Name: Robinair 15500 VacuMaster 5 CFM Two-Stage Vacuum Pump
Brand: Robinair
SKU: ROB15500
Price: 349.99 USD
Availability: InStock

Robinair 15500 VacuMaster 5 CFM Vacuum Pump | RobinairUS

Product Details

Accelerate system pull-downs with the Robinair 15500 VacuMaster 5 CFM Two-Stage Vacuum Pump (SKU: ROB15500). Engineered for HVAC service technicians and auto repair specialists, this high-performance robinair vacumaster pump combines a 5 CFM displacement rate with a dual-stage design to reach deep micron vacuum levels quickly and boil off trapped moisture.

Built with lightweight cast aluminum housing and a heavy-duty motor, the Robinair 15500 handles continuous daily use across automotive climate systems and residential/commercial refrigeration lines. Its internal forced-feed lubrication system ensures continuous oil distribution to critical moving components, extending service life and maintaining maximum vacuum strength when paired with premium robinair vacuum pump oil.

Key Features & Capabilities

5 CFM Displacement Rate: Delivers rapid evacuation on larger automotive A/C systems, commercial refrigeration, and residential HVAC lines.
Two-Stage Rotary Vane Performance: Achieves deep ultimate vacuum levels significantly faster than single-stage pumps to remove non-condensable gases and moisture.
Forced-Feed Lubrication: Supplies clean, filtered oil continuously to internal vanes and bearings to minimize heat and internal wear.
Heavy-Duty High-Torque Motor: Guarantees quick, reliable cold-weather starts and stable operation under varying power conditions.
Easy Sight Glass & Drain Valve: Built-in sight glass allows instant oil level monitoring, while the bottom drain valve enables quick, clean oil changes.

Technical Specifications

Model: Robinair 15500 (VacuMaster Series)
SKU: ROB15500
Free Air Displacement: 5 CFM
Number of Stages: 2-Stage Rotary Vane
Voltage: 110V–115V / 60 Hz
Application: Automotive A/C servicing, fleet vehicle repair, and HVAC/R system evacuation

15500: questions before buying

What are the main 15500 specifications?

The Robinair 15500 is a two-stage, 5 CFM vacuum pump. The manufacturer lists 115V, 60 Hz power and a 35-micron factory rating.

How does it compare with the 15600 and 15800?

Compare displacement, factory vacuum rating and electrical requirements together. A higher CFM number alone does not specify the vacuum achieved in a connected system. See the model comparison below.

Compare vacuum pump specifications
Model	Displacement	Factory rating	Power
15500	5 CFM	35 microns	115V, 60 Hz
15600	6 CFM	15 microns	115V, 60 Hz
15800	8 CFM	35 microns	115V, 60 Hz

Manufacturer specifications and operating instructions: Robinair 15500, Robinair 15600, Robinair 15800.

Customer Reviews

About these reviews

4.5

Based on 100 reviews

Pinned

Steven

· Jun 21, 2025

Excellent build quality and very quiet compared to other cheaper, lower rated CFM pumps

Very high quality pump. I've owned others and not only could I tell an immediate difference in build quality by how heavy and well put together this pump is compared to the others but the quietness and deep vacuum ability are unparalleled. I live in the NE heights of Albuquerque so my elevation is around 5400ft (1645 meters) above sea level. Most people forget to calculate elevation into the amount of mercury your able to pull but I'm here to tell you it factors a GREAT DEAL INTO IT. For instance at my elevation I'm only supposed to be able to pull 25inHg with a vacuum pump that pulls 29-30inHg at sea level (San Diego, CA for instance). So if your at a high elevation like me(Denver for instance) and can't understand why your vacuum pump rated for 29inHg is only pulling 25, it's not the pumps fault (more then likely). Bc the higher your elevation the lower the available atmospheric pressure. Why the meteorology lesson you say?! I'll get to the point. Even tho this pump or any pump is technically supposed to only be able to produce 25inHg at 5400ft it was consistently producing beyond that teetering between 27-28inHg which I was very impressed by- I mean it's kind of defying the laws of physics w/those #'s ;) ! The fact that it's a dual stage pump means that if your in a hurry it should be able to boil any moisture from the system in about half the time of a single stage. I can't say whether it'll happen to you but before I had a chance to use it for a reason that escapes me atm I was going to return it so they offered me ~60-70$ off to keep it and I accepted (wouldn't hurt to try..we could all use a little help in this rigged economy) I've had it for about a year and a half at this point and used it to pull vacuum on 3 different vehicles (one of which I've pulled a few times bc of how old and long it was open to the elements) and the oil is still really clean. I bought replacement robinair oil tho so I'll be changing it before the next run for maintenance-also bc it is a tad low. It won't kill it if you do -ask me how I know- but the oil fill port is not the big cap that says oil directly above the drain screw- it's right next to the front of the handle I'll update review if I have any issues - I don't suspect I'll have any. Sorry for the winded review! Hopefully it helps someone!

Pinned

Chad

· Feb 6, 2025

Exceptional performance for the money

I had limited budget for my project and ordered used pump and gauge. First pump arrived damaged. The first gauge was in rough shape. I ordered replacements. I tested them with a brand-new gauge set. The pump is rated at 35 micron and I didn’t have high hopes but I was surprised. It held 24 micron for 2 hours before I stopped the pump. I don’t work on AC units everyday and it’s more than enough for what I need it for.

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