---
product_id: 645745242
title: "OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included"
brand: "orion motor tech"
price: "$304.91"
currency: USD
in_stock: true
reviews_count: 5
category: "Orion Motor Tech"
url: https://www.desertcart.us/products/645745242-omt-3-5-cfm-single-stage-vacuum-pump-for-r134a
store_origin: US
region: United States of America
---

# 0.25 HP Copper Motor 3.5 CFM Flow Rate 37.5 Microns Ultimate Vacuum OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included

**Brand:** orion motor tech
**Price:** $304.91
**Availability:** ✅ In Stock

## Summary

> 🛠️ Pump up your HVAC game with precision and power!

## Quick Answers

- **What is this?** OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included by orion motor tech
- **How much does it cost?** $304.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/645745242-omt-3-5-cfm-single-stage-vacuum-pump-for-r134a)

## Best For

- orion motor tech enthusiasts

## Why This Product

- Trusted orion motor tech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **User-Centric Design:** Integrated oil sight glass and scale plus lightweight portability make maintenance and transport effortless.
- • **Powerful Copper Core:** Experience rapid HVAC evacuation with a robust 1/4 HP all-copper motor designed for longevity and efficiency.
- • **Versatile Compatibility:** Supports R12, R22, R134a, and R410a refrigerants with multiple port sizes and included adapter for seamless connectivity.
- • **Durable Aluminum Alloy Build:** Heat-dissipating, corrosion-resistant casing ensures years of reliable, safe operation under tough conditions.
- • **Precision Vacuum Performance:** Achieve ultra-low 37.5 microns vacuum for flawless AC system servicing and resin degassing.

## Overview

The OMT 3.5 CFM Single Stage Vacuum Pump combines a high-efficiency 0.25 HP copper motor with a 37.5 micron ultimate vacuum capability, housed in a durable aluminum alloy casing. Designed for automotive and HVAC professionals, it offers fast evacuation of refrigerants R12, R22, R134a, and R410a, with user-friendly features like an oil sight glass, multiple port sizes, and portability. Ideal for both HVAC servicing and resin degassing, this pump delivers reliable, contamination-free operation with included oil and accessories.

## Description

Evacuate automotive and other low-tonnage units quickly with this powerful portable AC vacuum pump from Orion Motor Tech! The 1/4 hp all-copper motor of our single stage rotary vane vacuum pump offers a 3.5 cfm flow rate able to draw your HVAC system down as low as 37.5 microns (5 Pa). The system's oil level and quality is easily monitored using the built-in sight glass; a pair one-size-fits-most gloves come included to keep replacement quick and clean. Ideal for any user, even beginners, the clear instructions guide removal of air, water, and other gases and vapors from R-12, R-22, R-134a, and R-410a systems using its 1/4 and 1/2 inch inlet ports. (An included adapter also allows use with 3/8 inch tubing.) This HVAC pump's innovative design prevents oil backflow and separates the exhaust flow from its oil vapor, limiting contamination and providing safer operation. The reinforced aluminum alloy casing effectively dissipates heat generated during operation and resists chemical corrosion for years of helpful use; plus, its light weight and convenient handle keep things easily portable for transport or storage. Get this vacuum pump today and start enjoying faster and easier HVAC servicing today! Specifications Material: Aluminum Alloy, Copper, Rubber Color: Black, Blue Flow Rate (FAD): 3.5 cfm (5.9 m³/h) Ultimate Vacuum: 37.5 Microns (5 Pa) Power: 0.25 HP (186W) Ports: 0.25 & 0.5 in. Compatible Refrigerants: 12, 22, 134a, 410a Oil Capacity: 7.6 fl. oz. (225 mL) Net Weight: 10.9 lb. (5 kg) Warranty: 1 Year Package List 1 x Vacuum Pump 1 x Adapter (1/4" to 3/8") 1 x Pair of Gloves 1 x Instructions

Review: Funciona perfectamente - Muy buena bomba
Review: Nice unit and works very well! - Used this to pull a vacuum on my AC system before recharging. System held a solid vacuum. Vacuum hose connected to the pump with no effort and has a nice tight fit. It is affordable for someone like myself who’s somewhat of a DIYer and a home mechanic. It is a reliable entry level pump.

## Features

- PUMP IT OUT: This single-stage rotary vane vacuum pump from Orion Motor Tech is powered by a 1/4 hp all copper motor to keep your HVAC servicing fast and easy; its 3.5 cfm flow rate can draw your system down as low as 37.5 microns (5 Pa) and is also able to quickly degas batches of resin, epoxy, oil, and other solvents when equipped with a vacuum chamber
- SAFE & DURABLE: The reinforced aluminum alloy casing effectively dissipates heat generated during operation and resists chemical corrosion for years of helpful use; its innovative design also prevents oil backflow and separates the exhaust from any oil vapor, limiting contamination and providing safer operation
- USER FRIENDLY: The 7.6 fl. oz. reservoir includes a sight glass and scale for easy monitoring of the pump's oil level and quality; the light weight and sturdy handle keep everything easily portable for transport or storage between jobs; and 1/4" and 3/8" ports allow fast and easy servicing of automotive and other low-tonnage R12, R22, R134a, and R410a systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CSGDHQML |
| Best Sellers Rank | #88,363 in Kitchen ( See Top 100 in Kitchen ) #179 in Canister Vacuum Cleaners |
| Brand | Orion Motor Tech |
| Customer Reviews | 4.5 4.5 out of 5 stars (391) |
| Date First Available | 8 March 2024 |
| Item Weight | 4.9 Kilograms |
| Item model number | MPN1VPHAN01-LB |
| Manufacturer | Orion Motor Tech |
| Manufacturer Part Number | VPH-AN01-LB |
| Model | Vacuum Pump |
| Product Dimensions | 27.43 x 10.92 x 21.59 cm; 4.9 kg |
| Voltage | 115 Volts |

## Product Details

- **Brand:** Orion Motor Tech
- **Material:** Aluminum Copper Rubber
- **Style:** portable
- **Power source:** ac
- **Item weight:** 4.9 Kilograms

## Images

![OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included - Image 1](https://m.media-amazon.com/images/I/71bhD1hFXOL.jpg)
![OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included - Image 2](https://m.media-amazon.com/images/I/81i4M9jGaIL.jpg)
![OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included - Image 3](https://m.media-amazon.com/images/I/81qw1uTx18L.jpg)
![OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included - Image 4](https://m.media-amazon.com/images/I/81JUaF1MsjL.jpg)
![OMT 3.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto AC HVAC Kit | Copper Motor; 37.5 Microns Ultimate Vacuum; Aluminum Alloy Casing; For Automotive HVAC and Resin Degassing; Oil Included - Image 5](https://m.media-amazon.com/images/I/81CVMhc3PML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Funciona perfectamente
*by L***S on 24 May 2026*

Muy buena bomba

### ⭐⭐⭐⭐⭐ Nice unit and works very well!
*by M***H on 10 June 2026*

Used this to pull a vacuum on my AC system before recharging. System held a solid vacuum. Vacuum hose connected to the pump with no effort and has a nice tight fit. It is affordable for someone like myself who’s somewhat of a DIYer and a home mechanic. It is a reliable entry level pump.

### ⭐⭐⭐⭐⭐ Outstanding!!
*by E***K on 29 March 2026*

I read reviews for a hand full of these pumps before purchasing and was worried about a hand full of things. I have done plenty of automotive A/C jobs and got tired of dealing with rentals or an air compressor venturi attachment. I decided to treat myself and bought this to make life easier. It works great and bottoms out the manifold gauges within a minute or two to boil off any moisture. I kept it on for 45 minutes and was all worried about oil clouds and misting etc, but this did not make any mess at all, nor use any oil at all. Maybe it was the environment, I’m not sure. For reference this was in Southern California and 82 degrees outside. It’s true the provided bottle of oil that comes with this is only enough to fill the tank half way to its capacity, but since it didn’t consume any oil for the job I am still good for the next one. This pump is whisper quiet as well, so I was able to talk normal around it running with no issues and the neighbors can’t complain. The casing was hot to touch as expected, but not enough to burn at all. Build quality is exceptional, including the plastic port caps. I was worried those would be brittle and thin, but they are heavy duty. No leaks at all either, and will update if I have any issues. Overall, just a great purchase!

## Frequently Bought Together

- Orion Motor Tech Vacuum Pump, 3.5 cfm 1/4 hp HVAC Single Stage Vacuum Pump for R12 R22 R134a R410a R502, Auto AC Vacuum Pump Kit for Automotive Air Conditioner Resin Degassing & More, Oil Included
- Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-29*