# Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump Orion Motor Tech’s OMT 4.5 CFM single-stage vacuum pump is listed for automotive AC and HVAC evacuation, with a 1/3 hp motor and a claimed ultimate vacuum of 37.5 microns. Its oil-level window and included oil are useful for service work, though buyers should account for mixed customer feedback about heat, reliability and oil needs. - [Original product page](https://best-deals.pro/product/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [View offer](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - Market: US - Language: en-US - Currency: USD - Brand: Orion Motor Tech - Model: FBA-VPHC001GE - Price: 71.99 USD - Previous price: 79.99 USD - Discount: 10% - Price checked: 2026-11-12T10:10:56.200Z - Rating: 4.4 / 5 - Reviews: 1064 Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store. ## At a glance - The listing claims compatibility with R12, R22, R134a, R410a and R502 refrigerants. - A sight glass and scale are intended to make oil-level checks easier. - The manufacturer describes an aluminum alloy casing, intake filter and oil-mist trap. - The listing presents uses beyond HVAC service, including vacuum packaging, wine degassing and thermoforming. ## Pros - The listed 4.5 cfm flow rate and 1/3 hp motor provide concrete performance specifications for comparing single-stage pumps. - Oil is listed as provided, and the pump has a sight glass and scale for monitoring the reservoir. - The listing names an adapter, Teflon tape and work gloves among the supplied accessories. ## Cons - The stated duty cycle is 30 minutes, which may constrain uninterrupted operation. ## Specifications ### Identity - Brand: Orion Motor Tech ### Pump performance - Pump type: Rotary Vane - Motor power: 1/3 hp \(248W\) - Flow rate: 4.5 cfm \(7.6 m³/h\) - Ultimate vacuum: 37.5 Microns \(5 Pa\) - Duty cycle: 30 min. ### Ports, oil and power cord - Inlet ports: 1/4 in. & 1/2 in. - Oil capacity: 0.24 qt. \(225 mL\) - Oil provided: 0.26 qt. \(250 mL\) - Cord length: 4.6 ft. ### Dimensions and installation - Dimensions listed: 10.8 x 4.3 x 8.5 inches - Weight listed: 10.78 pounds ### Listed accessories - Provided accessories: 1x 1/4" to 3/8" Adapter, 1x Teflon Tape, 1x Pair of Work Gloves ## Before you buy - The listing gives conflicting dimensions and weight: its details section says 10.8 x 4.3 x 8.5 inches and 10.78 pounds, while the technical listing says 9.8×4.3×8.5 in. and 10.3 lb. Customer feedback also varies on durability and oil sufficiency, and reports the pump can get extremely hot. Treat performance and build claims as listing claims, not verified results. ## A good fit for - Automotive AC and HVAC users comparing a single-stage pump by listed flow rate, motor power and ultimate vacuum. - Users who want an oil-level viewing window and a small set of listed service accessories. ## Less suited to - Buyers who need a pump for uninterrupted operation beyond the listed 30-minute duty cycle. - Buyers who require confirmed long-term reliability or consistently low operating temperatures. ## Customer feedback Customer feedback highlights perceived quiet operation, suction and quick evacuation, while durability and oil sufficiency receive mixed reports. Some customers describe units failing after first use, and others report substantial heat during operation. These reports matter for buyers considering repeated or extended service work, especially alongside the listed 30-minute duty cycle. Feedback is not a performance test or confirmation of the manufacturer’s vacuum and flow claims. - Positive themes: Customers report quiet operation, strong suction and quick evacuation. - Negative themes: Some customers report that the pump gets extremely hot during operation. - Mixed feedback: Customer reports differ on durability and reliability, including both well-constructed impressions and early failures. - Mixed feedback: Customers disagree about whether the supplied oil amount is sufficient. ## Frequently asked questions ### What refrigerants does the listing name? The listing names R12, R22, R134a, R410a and R502. Confirm suitability for your specific system and service procedure. ### What accessories are specified? The technical listing specifies a 1/4" to 3/8" adapter, Teflon tape and a pair of work gloves. The feature text also claims the package includes lubricating and absorptive oil. ### How long is the stated duty cycle? The listed duty cycle is 30 min. The source does not specify a cooldown interval. ### Are the listed dimensions and weight consistent? No. The details section lists 10.8 x 4.3 x 8.5 inches and 10.78 pounds, while another technical section lists 9.8×4.3×8.5 in. and 10.3 lb. Check the selected listing before relying on these measurements. ## Alternative options - [VEVOR Vacuum Pump, 5 CFM, HVAC Single Stage Rotary Vane Vacuum Pump, for R134a R22 R410a Systems, Auto AC Vacuum Pump Kit with Oil Bottle, for Automotive Air Conditioner Maintenance Resin Degassing](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [2F2R 5 CFM Dual Stage Vacuum Pump, 1/2 HP Plug-in HVAC Vacuum Pump, 15 Micron Deep ...](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [OMT 3.5 CFM AC Vacuum Pump and Gauge Set for R134a R12 R22 R502 \| Aluminum Alloy Casing; 3 Color Hoses, Can Taps & Adapters; For Mini Split, HVAC & Auto Systems; For Mechanics & DIY Use](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [VEVOR 4.5 CFM AC Vacuum Pump and Gauge Set Single Stage Rotary Vane Pump \| A/C Refrigerant Manifold Gauge Kit, with Leak Detector, Hose, Storage Bag, for R134a, R12, R22, R502a, R410A, R404, R407C](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [VEVOR 3.5 CFM AC Vacuum Pump and Gauge Set, Single Stage Rotary Vane HVAC Air Vacuum Pump, A/C Refrigerant Manifold Gauge Kit, with Hoses, for R134a, R12, R22, R502a, R410A, R404, R407C Refrigerants](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [Lichamp 1/4HP 3.5CFM Single Stage Vacuum Pump for R134a/R410a \| Auto AC Air Tool; for Automotive Air Conditioner Refrigerant; Oil Included; Cool Gray](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [Jack Boss A2L 3.5 CFM Vacuum Pump Works For HVAC R134a R32 R1234yf R410a \| 110V, 1 Stage, 1/4 HP Sparkless Motor, For Mini Split Auto System, Resin Degassing, with Oil Bottles](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [OMT 9 CFM 2 Stage Rotary Vane Vacuum Pump for R12 R22 R134a R410a \| Copper Motor; 1.5 Micron Ultimate Vacuum; 12.8 oz Oil Reservoir; Under 70 dB Low Noise; Industrial and HVAC Applications](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [BACOENG 3.6CFM 1/4HP AC Vacuum Pump and Manifold Gauge Set \| 110V HVAC Vacuum Pump Kit mit Copper Motor, 5FT 3-Color Hoses, for R134a R410a R22 Automotive A/C & Mini Split Systems](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [OMT 4 CFM 1/3 HP 1-Stage AC Vacuum Pump and Gauge Set for R134a R22 R410a \| Copper Motor, Aluminum Alloy Casing; 4 Color Hoses, Can Taps, Adapters & Leak Detector; For Mini Split, HVAC & Auto Systems](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [PB Motor Tech 4.5CFM Vacuum Pump & Brass AC Gauge, R134A R12 R22 R502 \| 1/3 HP Sing...](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [VIVOHOME 110V 1/3 HP 4CFM Single Stage Rotary Vane Air Vacuum Pump and R134a AC Manifold Gauge Set Kit with Leak Detector Carry Bag for HVAC Air Conditioning Refrigeration Recharging ETL Listed](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) ## Add-ons - [OMT AC Manifold Gauge Set with 5ft Hoses for R1234yf R404a R134a, 3 Way \| Includes Quick Couplers Self Sealing Can Taps for C](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) - [OMT R1234yf Self Sealing Can Tap with 1/4" to 1/2" Adapter for Auto AC \| Heat-Treated Brass; 3-Fold Leak Prevention; Ergonomi](https://best-deals.pro/visit/orion-motor-tech-omt-45-cfm-single-stage-vacuum-pump) ## Images ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 1](https://best-deals.pro/i/YlYki9XMiMnKpCTxm1YNr5PVPxKfSRl_vRMDUHe6Lt55AxoNGb-yRI2PqoAtieSGSpej1IgPU-wG_jvfm4g6rdftrO4LldsFUWr4wBM2IKJd1z4SpUxDlO4x.jpg) ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 2](https://best-deals.pro/i/NCg7d9PKZhCkDM0t4PLd7lQavJG6oQQv7fRECeT-vTbNa-CSTA18b7BLQgua5O04yDTTyviGJatc8Ecuk_9jzftV-afv6AvaypScmYXT0O5cCxz7qNGV3yV5.jpg) ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 3](https://best-deals.pro/i/_86UsB5g_7pCSvYzE-PwrSGGaA5NDsmOW4FEtRKcmvVwz9BNycneLyg8Q5cy6BCXp5xG7Ryb3w3SMzH_5pMk7K_bLu5K7vKvKueuErCnNFBwP4-I6Y4wBccY.jpg) ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 4](https://best-deals.pro/i/nxRsfaVYQfyToIeXC_n9-zv5FOlXcp3t4GAeAyaKkVVBrQSgvPpM4xlB54X9biSA-sTl5TiupTxVNRGgIcmvcoalnGTiJuEiEChPMJpFpC4EiliW0eHawcg-.jpg) ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 5](https://best-deals.pro/i/lpw7MwbaXhbDimI_oMorhvLfVrmmXO8sCYYg_lq_1A2e3xLH8aMYnCJkhJt2YlPW2jbWDawa0N5IEmBPul2BbiLbqli6JVzFIRbKllk8fS2OQMcCM2tnqdm7.jpg) ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 6](https://best-deals.pro/i/kcIZ-QyA8XwfR--tXhBd8cW1MWpEihHQWVRyv87t3oNz-qwTe4OQLNTHhG3C7EDs13pxPmd7uDFn0Jo6UmSJXkXM2NQGXYHHlABKdlg06rEG4Kp_uPZl4S6z.jpg) ![Orion Motor Tech OMT 4.5 CFM Single-Stage Vacuum Pump — 7](https://best-deals.pro/i/O332NWfGkkfmcoyXkaYQ0qF_YzDej776TjFG0iBczrFqP7c4rruGd4VjEzmhD6kMhmWcHDRudVegEkIxa_IBMNq_ks_KOeuF_YP0ak3lHfmHClVrt3Q8gQ0L.jpg)