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4 CFM Single Stage Rotary Vane Vacuum Pump 1/3 HP HVAC
National HVAC Parts

4 CFM Single Stage Rotary Vane Vacuum Pump 1/3 HP HVAC

SKU: NHVAC-HVAC-4WKK8V Brand: National HVAC Parts
$89.00 $120.15

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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4 CFM Single Stage Rotary Vane Vacuum Pump 1/3 HP HVAC

A reliable single-stage rotary vane vacuum pump designed for HVAC system evacuation. Before charging refrigerant, the system must be pulled to a deep vacuum to remove moisture and non-condensables — this pump handles residential and light commercial systems with ease.

Key Features

  • 4 CFM displacement for fast evacuation of residential AC systems
  • 1/3 HP motor pulls down to 75 microns for proper dehydration
  • Built-in cooling fan prevents overheating during extended runs
  • Oil sight glass for easy level monitoring

Specifications

  • Displacement: 4 CFM
  • Motor: 1/3 HP, 110V/60Hz
  • Ultimate vacuum: 75 microns (5 Pa)
  • Oil capacity: 350ml
  • Inlet: 1/4" SAE flare

What's Included

  • Vacuum pump
  • Bottle of vacuum pump oil (350ml)

Ships same-day from our Houston warehouse on orders placed before 3PM CST.

Frequently Asked Questions

How long does it take to evacuate a residential AC system?

A typical 2-3 ton residential system takes 30-45 minutes to pull down to 500 microns. Allow additional time for the standing vacuum test.

How often should I change the oil?

Change the oil after every job, or whenever it appears cloudy or dark. Clean oil is critical for achieving a deep vacuum.

Can this handle R410A systems?

Yes, this pump works with all common refrigerants including R410A, R22, R134a, and R404A. The refrigerant type does not affect pump operation.

Is 4 CFM enough for commercial systems?

4 CFM is ideal for residential up to 5 tons. For larger commercial systems (10+ tons), a dual-stage 8+ CFM pump would be faster.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this HVAC Tools fit my National HVAC Parts 4 CFM Single Stage Rotary Vane Vacuum Pump 1/3 HP HVAC?
Yes. This is the factory-specified OEM hvac tools for the National HVAC Parts 4 CFM Single Stage Rotary Vane Vacuum Pump 1/3 HP HVAC. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the hvac tools on my National HVAC Parts 4 CFM Single Stage Rotary Vane Vacuum Pump 1/3 HP HVAC?
Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.
What symptoms mean I need a new hvac tools?
Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.
Is this hvac tools compatible with Bryant or Payne too?
Many National HVAC Parts parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my National HVAC Parts hvac tools?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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