Robinair CoolTech™ CT15121A (236 L/min, dual-voltage) — a proven two-stage rotary vane vacuum pump built for licensed HVAC/R techs who need fast, consistent evacuation and fewer call-backs. It’s lightweight, tough, and the Iso-Valve™ lets you isolate the pump from the system in a quarter turn. Fair dinkum performance when the roof’s roasting and the job can’t wait.

Key Features & Trade Benefits

• Two-stage, offset rotary vane — pulls a deeper vacuum faster, so you dry the system properly and get off site sooner.
• Factory micron rating: 15 microns — achieve a tight system with confidence and reduce rework. (AU 50 Hz free-air displacement: 236 L/min.)
• Iso-Valve™ — isolate the pump without disconnecting; perfect for rate-of-rise checks and avoiding oil suck-back.
• Gas ballast — lets moisture-laden air pass through without condensing in the oil, protecting pump performance.
• Die-cast aluminium body & polycarbonate base — durable, stable, and lighter to lug up ladders. No dramas on site.
• Dual-voltage motor (110–127V / 220V, 50/60 Hz) — ready for AU 230 V/50 Hz, with high-torque start-up.
• Multiple inlet fittings — 1/4", 3/8" and 1/2" SAE MFL for flexible hose setups and fewer adaptors.

Why This Vacuum Pump Matters

We’ve all been there — up in Brisbane on a 38-degree day, chasing moisture that just won’t quit. The CT15121A’s two-stage stack and gas ballast get you down through the 1,000–300 microns zone smoothly, while the Iso-Valve makes leak isolation and rate-of-rise checks quick. It’s a bloody good way to keep schedules tight and jobs tidy. For more options, browse our Vacuum Pumps collection.

Pro Tip

Open the gas ballast at the start of evacuation and close it around 1000–3000 microns to prevent water vapour condensing in the oil — then finish the pull-down. And change the oil after each job for consistent deep vacuums. She’ll be right if the oil’s right.

Compatibility & System Info

• Designed for A/C-R systems using CFCs, HCFCs and HFCs with mineral, POE/ester, alkylbenzene or PAG oils.
• Not for use with flammable refrigerants (e.g., A2L/A3) or ammonia/lithium bromide systems — follow manufacturer safety guidance.
• Inlet fittings: 1/4", 3/8", 1/2" SAE MFL. Use full-flow vacuum hoses and a core removal tool to speed evacuation.

Local Jobsite Note (AU)

From humid Sydney basements to sun-baked rooftops in Brisbane, the stable base, angled drain and easy oil view help you keep things neat, safe and efficient. Too easy.

What’s Included

• 1 × Robinair CoolTech™ CT15121A Vacuum Pump
• Dual-voltage IEC cable
• Exhaust filter
• 12-month manufacturer warranty

Pack-ins and warranty per listing/manual.

Specifications

Specifications verified from the official Robinair 15121A manual.

Warranty & Returns

12-month manufacturer warranty. Returns follow HVAC Shop’s standard policy — contact us if you need a hand and we’ll sort it.

FAQs

Related Products

• Robinair 13203 Premium Vacuum Pump Oil (0.95 L) — fresh oil helps you hit target microns faster and protects the pump. Handy to keep in the van.
• Robinair 14777 Digital Micron Gauge — verify deep vacuum before charging; pocket-size with LCD down to 10 microns.
• Hilmor 1/4″ Valve Core Removal Tool — remove cores for full-flow evacuation and faster times. It’s a ripper little time-saver.