Robinair VacuMaster 15800 2-Stage Vacuum Pump — 8 CFM Chrome, 1 HP Motor, 35–40 Micron Pull-Down

The Robinair 15800 VacuMaster Economy is a heavy‑duty two‑stage rotary‑vane vacuum pump delivering 8 CFM and professional‑grade evacuation for commercial refrigeration and HVACR work.

Built to handle demanding service calls, the VacuMaster 15800 combines a 1 HP thermally protected motor with finned aluminum cooling surfaces, engineered inlet fittings, and thoughtful service features like an easy‑read sight glass, bottom‑angled oil drain, and a generous 18.6‑ounce oil reservoir. It is sized and specified to support systems up to about 70 tons and includes oil so technicians can put the unit to work right away.

How much evacuation performance does this pump provide?

The VacuMaster 15800 produces 8 cubic feet per minute of free air displacement and is factory‑rated to pull down to approximately 35–40 microns under typical conditions. Its two‑stage rotary‑vane arrangement improves ultimate vacuum and pumpdown speed compared with single‑stage units.

• 8 CFM free air displacement for faster system pull‑down
• Factory rating near 35–40 microns for deep evacuation
• Two‑stage rotary‑vane design for better ultimate vacuum

What service‑friendly features help save time on the job?

Robinair focused on serviceability: an easy access oil fill port and bottom‑angled oil drain speed fluid changes, while the sight glass lets you confirm oil level at a glance. Non‑skid feet stabilize the pump during use and the 72‑inch cord reaches work areas without adding extension reels.

• Easy‑read sight glass for quick oil level checks
• Angled oil drain at reservoir base for more complete draining
• Long 72" cord and non‑skid feet for convenient, stable operation

What construction and protection features extend pump life?

This model integrates finned aluminum surfaces to dissipate heat faster, reducing internal temperatures during extended use. The 1 HP motor is thermally protected to guard against overload, and inlet fittings are shaped to maximize airflow while preventing oil backflow into the system.

• Finned aluminum cooling surfaces for improved heat dissipation
• Thermally protected 1 HP motor (115V, 60 Hz) for durability
• Inlet fittings engineered to optimize airflow and reduce oil backflow

Which connections and accessories are included or supported?

The pump has standard 1/4" and 3/8" MFL inlet fittings to match common service hoses and manifolds. It ships with oil and a factory power cord, letting technicians begin evacuation tasks immediately without sourcing additional consumables.

• 1/4" and 3/8" MFL inlet fittings for compatibility with service hoses
• Included pump oil so unit is ready to use from delivery
• Standard 115V power with 72" cord for jobsite flexibility

Who is this pump designed for? The Robinair 15800 VacuMaster Economy is intended for HVACR professionals, refrigeration service shops, and mobile technicians who need a dependable, portable vacuum pump for commercial refrigeration and larger HVAC systems. It suits crews that require a balance of fast pull‑down, durable construction, and easy maintenance without stepping up to industrial, permanently installed equipment.