5.7 Inch Motor Gasket for MD Central Vacuum – Part# 221

5.7 Inch Motor Gasket for MD Central Vacuum – Part# 221

Available: In Stock
$3.60
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Quick Summary

This 5.7 inch motor gasket helps prevent metal-to-metal contact when bolting in the motor. When replacing a motor, you may or may not need to replace the gasket depending on the shape and function of your original gasket.

Available from Ace Vacuums, with help matching parts to your MD central vacuum system at our Fairfax and Leesburg, VA showrooms.

Quick Highlights

  • Helps prevent metal-to-metal contact
  • Used when bolting in the motor
  • For 5.7 inch motor applications
  • Part number 221
  • Listed for many MD central vacuum models
  • Reuse original form-fitting gasket when required

Product Overview

This motor gasket is used to help prevent metal-to-metal contact when installing or bolting in a motor in an MD central vacuum system. It is a simple replacement part often considered during motor replacement.

Not every motor replacement requires a new gasket. If your original gasket is a larger form-fitting style, reuse the original gasket to help prevent damage to components.

This gasket is listed for a wide range of MD central vacuum models and is also noted as compatible with several central vacuum brands in the provided compatibility list.


Key Features

  • Motor installation support: Designed to prevent metal-to-metal contact when the motor is bolted into place.
  • Useful during motor replacement: Often considered when replacing a motor, though replacement is not always necessary.
  • Important reuse note: If the original gasket is a larger form-fitting type, it should be reused to help prevent component damage.
  • Broad model listing: Listed for many MD central vacuum power unit models across 120V and 240V versions.
  • Part identification: This gasket is sold under part number 221 for reference when ordering.

MD Compatibility

This part is listed as the match for these MD central vacuum power units:

  • MD B2 (120V)
  • MD B2 (240V)
  • MD E2 (120V)
  • MD E2 (240V)
  • MD E3 (120V)
  • MD E3 (240V)
  • MD G23 (120V)
  • MD G23 (240V)
  • MD J (120V)
  • MD J (240V)
  • MD K (120V)
  • MD M465H (120V)
  • MD M575H (120V)
  • MD M575H2 (240V)
  • MD M615H (120V)
  • MD M850 (120V)
  • MD M850 (240V)
  • MD M850H (120V)
  • MD M850H2 (240V)
  • MD M965H (120V)
  • MD M965H2 (240V)
  • MD QE2 (120V)
  • MD QE2 (240V)
  • MD QE3 (120V)
  • MD QE3 (240V)

Check the model number on your power unit label before ordering. Our team can confirm the match if you are unsure.


Technical Specifications

Specification Details
Brand Generic
Product type Motor gasket
Size 5.7 inch
Part number 221
Compatibility note Includes AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore and Eureka
Fits MD model MD B2 (120V)
Fits MD model MD B2 (240V)
Fits MD model MD E2 (120V)
Fits MD model MD E2 (240V)
Fits MD model MD E3 (120V)
Fits MD model MD E3 (240V)
Fits MD model MD G23 (120V)
Fits MD model MD G23 (240V)
Fits MD model MD J (120V)
Fits MD model MD J (240V)
Fits MD model MD K (120V)
Fits MD model MD M465H (120V)
Fits MD model MD M575H (120V)
Fits MD model MD M575H2 (240V)
Fits MD model MD M615H (120V)
Fits MD model MD M850 (120V)
Fits MD model MD M850 (240V)
Fits MD model MD M850H (120V)
Fits MD model MD M850H2 (240V)
Fits MD model MD M965H (120V)
Fits MD model MD M965H2 (240V)
Fits MD model MD QE2 (120V)
Fits MD model MD QE2 (240V)
Fits MD model MD QE3 (120V)
Fits MD model MD QE3 (240V)
Authorized Dealer Ace Vacuums

Best For

  • Replacing a motor in an MD central vacuum
  • Preventing metal-to-metal contact during motor installation
  • Owners of listed MD B2, E2, E3, G23, J, K, M, and QE series units
  • Referencing part number 221 for a replacement gasket

Not Ideal For

  • Units that use a larger original form-fitting gasket that must be reused
  • Shoppers who have not confirmed their MD central vacuum model
  • Applications where gasket shape differs from the original part

Why Buy from Ace Vacuums

When you purchase from Ace Vacuums, you receive:

  • Central vacuum parts matched to your MD system
  • Help choosing the right hose, tools and inlet parts
  • Knowledgeable support before and after the sale
  • Shipping or pickup at our Fairfax and Leesburg showrooms

Available Online & In-Store

The 5.7 Inch Motor Gasket for MD Central Vacuum is available online and in-store through Ace Vacuums.

Visit Our Showrooms

  • Fairfax, VA: 11110 Main St, Fairfax, VA 22030
  • Leesburg, VA: 300 Fort Evans Rd NE, Leesburg, VA 20176

Call 703-997-9292 (ext. 1 Fairfax, ext. 2 Leesburg).


Quick Summary

This 5.7 inch motor gasket helps prevent metal-to-metal contact when bolting in the motor. When replacing a motor, you may or may not need to replace the gasket depending on the shape and function of your original gasket.

Available from Ace Vacuums, with help matching parts to your MD central vacuum system at our Fairfax and Leesburg, VA showrooms.

Quick Highlights

  • Helps prevent metal-to-metal contact
  • Used when bolting in the motor
  • For 5.7 inch motor applications
  • Part number 221
  • Listed for many MD central vacuum models
  • Reuse original form-fitting gasket when required

Product Overview

This motor gasket is used to help prevent metal-to-metal contact when installing or bolting in a motor in an MD central vacuum system. It is a simple replacement part often considered during motor replacement.

Not every motor replacement requires a new gasket. If your original gasket is a larger form-fitting style, reuse the original gasket to help prevent damage to components.

This gasket is listed for a wide range of MD central vacuum models and is also noted as compatible with several central vacuum brands in the provided compatibility list.


Key Features

  • Motor installation support: Designed to prevent metal-to-metal contact when the motor is bolted into place.
  • Useful during motor replacement: Often considered when replacing a motor, though replacement is not always necessary.
  • Important reuse note: If the original gasket is a larger form-fitting type, it should be reused to help prevent component damage.
  • Broad model listing: Listed for many MD central vacuum power unit models across 120V and 240V versions.
  • Part identification: This gasket is sold under part number 221 for reference when ordering.

MD Compatibility

This part is listed as the match for these MD central vacuum power units:

  • MD B2 (120V)
  • MD B2 (240V)
  • MD E2 (120V)
  • MD E2 (240V)
  • MD E3 (120V)
  • MD E3 (240V)
  • MD G23 (120V)
  • MD G23 (240V)
  • MD J (120V)
  • MD J (240V)
  • MD K (120V)
  • MD M465H (120V)
  • MD M575H (120V)
  • MD M575H2 (240V)
  • MD M615H (120V)
  • MD M850 (120V)
  • MD M850 (240V)
  • MD M850H (120V)
  • MD M850H2 (240V)
  • MD M965H (120V)
  • MD M965H2 (240V)
  • MD QE2 (120V)
  • MD QE2 (240V)
  • MD QE3 (120V)
  • MD QE3 (240V)

Check the model number on your power unit label before ordering. Our team can confirm the match if you are unsure.


Technical Specifications

Specification Details
Brand Generic
Product type Motor gasket
Size 5.7 inch
Part number 221
Compatibility note Includes AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore and Eureka
Fits MD model MD B2 (120V)
Fits MD model MD B2 (240V)
Fits MD model MD E2 (120V)
Fits MD model MD E2 (240V)
Fits MD model MD E3 (120V)
Fits MD model MD E3 (240V)
Fits MD model MD G23 (120V)
Fits MD model MD G23 (240V)
Fits MD model MD J (120V)
Fits MD model MD J (240V)
Fits MD model MD K (120V)
Fits MD model MD M465H (120V)
Fits MD model MD M575H (120V)
Fits MD model MD M575H2 (240V)
Fits MD model MD M615H (120V)
Fits MD model MD M850 (120V)
Fits MD model MD M850 (240V)
Fits MD model MD M850H (120V)
Fits MD model MD M850H2 (240V)
Fits MD model MD M965H (120V)
Fits MD model MD M965H2 (240V)
Fits MD model MD QE2 (120V)
Fits MD model MD QE2 (240V)
Fits MD model MD QE3 (120V)
Fits MD model MD QE3 (240V)
Authorized Dealer Ace Vacuums

Best For

  • Replacing a motor in an MD central vacuum
  • Preventing metal-to-metal contact during motor installation
  • Owners of listed MD B2, E2, E3, G23, J, K, M, and QE series units
  • Referencing part number 221 for a replacement gasket

Not Ideal For

  • Units that use a larger original form-fitting gasket that must be reused
  • Shoppers who have not confirmed their MD central vacuum model
  • Applications where gasket shape differs from the original part

Why Buy from Ace Vacuums

When you purchase from Ace Vacuums, you receive:

  • Central vacuum parts matched to your MD system
  • Help choosing the right hose, tools and inlet parts
  • Knowledgeable support before and after the sale
  • Shipping or pickup at our Fairfax and Leesburg showrooms

Available Online & In-Store

The 5.7 Inch Motor Gasket for MD Central Vacuum is available online and in-store through Ace Vacuums.

Visit Our Showrooms

  • Fairfax, VA: 11110 Main St, Fairfax, VA 22030
  • Leesburg, VA: 300 Fort Evans Rd NE, Leesburg, VA 20176

Call 703-997-9292 (ext. 1 Fairfax, ext. 2 Leesburg).


Frequently Asked Questions

What does this motor gasket do?

Its purpose is to prevent metal-to-metal contact when bolting in the motor.

Do I always need to replace the gasket when replacing a motor?

No. When replacing a motor, you may or may not need to replace the gasket.

When should I reuse my original gasket?

If your original gasket is a larger form-fitting gasket, reuse the original gasket to help prevent damage to components.

Is this gasket for MD central vacuum systems?

Yes. It is listed for many MD central vacuum power unit models, including B2, E2, E3, G23, J, K, M-series, and QE-series models shown on this page.

How do I confirm compatibility with my MD central vacuum?

Check your exact MD central vacuum model against the listed fit information. If you are unsure, confirm your model before ordering, especially if your original gasket has a different shape.

What is the part number for this gasket?

The part number is 221.

Is this only listed for MD models?

The compatibility note also includes AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore and Eureka.

Visit Our Showrooms

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📍 AceVacuums Fairfax (DMV Hub)

Address: 11110 Main St, Fairfax, VA 22030
Landmark: Opposite Havertys Furniture Store
Best for: Bethesda, Potomac, Arlington, NW Washington D.C.

Get Real-Time Traffic & Directions

📍 AceVacuums Leesburg

Address: 300 Fort Evans Rd NE, Suite 104, Leesburg, VA 20176
Landmark: Next to Home Depot in Leesburg
Best for: Ashburn, Sterling, Frederick MD, Loudoun County

Get Real-Time Traffic & Directions

Shipping, Return & Refund Policy

Shipping Policy

In-stock merchandise generally ships from our Leesburg, Virginia location within 3–5 business days. Processing time is separate from carrier transit time and is not a guaranteed delivery date. Weekends and holidays can affect timing. Special-order, backordered or unavailable items may take longer; contact us to confirm timing before purchase when a deadline matters.

Shipping options and charges are shown at checkout. After dispatch, follow the carrier's tracking updates. Weather, carrier delays, order verification and inventory confirmation may affect delivery. Inspect packages promptly and retain packaging if there is damage or an incorrect or missing item.

Returns and refunds

Eligible unused items have a 30-calendar-day return request window for refunds or exchanges, measured from delivery or in-store purchase. Return authorization is required. Final-sale exclusions, the 15% restocking fee for change-of-mind returns and shipping responsibilities are explained in our Return and Refund Policy. That policy is the governing source for return eligibility and fees.

For shipping or return help, email sales@acevacuums.com or call 703-997-9292.


30-Day Returns, Refunds and Exchanges

Updated September 27, 2026. Request a return for an eligible unused item within 30 calendar days of delivery (or purchase for items collected in store). Eligible returns may be refunded to the original payment method or exchanged, subject to availability. The same 30-day request window applies to both refunds and exchanges; there is no separate seven-day or 15-day refund deadline.

Eligibility and authorization

Items must be unused, clean, complete and in their original packaging with all accessories, manuals and proof of purchase. Contact sales@acevacuums.com or 703-997-9292 before sending anything back. Include your order number, item and reason for return. We will confirm eligibility, charges and return instructions. Unapproved or cash-on-delivery returns are not accepted.

Fees and shipping

For an approved change-of-mind return, a 15% restocking fee applies to the returned merchandise price. Original shipping charges are not refundable and the customer pays return shipping. These charges do not apply to an approved return caused by our shipping error or a damaged/defective item claim. Contact us first so we can arrange the appropriate remedy and shipping instructions. Do not assume a prepaid label is included.

Final-sale and excluded items

Air purifiers; discounted, clearance, trade-in, holiday-sale and price-matched purchases; gift cards; custom or special-order products; electrical parts; used or installed items; opened cleaning solutions; and used bags, filters, belts or other consumables are not eligible for change-of-mind returns. Other items clearly marked final sale at purchase are also excluded. An opened box alone does not disqualify an otherwise eligible unused, complete item, but consumables and cleaning solutions must remain unopened.

Damaged, defective, incorrect or missing items; recalls

Inspect your order promptly and contact us as soon as you discover a problem, with your order number and photos where helpful. Keep the packaging. Change-of-mind exclusions and deadlines do not remove applicable defect, warranty, recall or statutory rights. Warranty coverage requires evaluation under the manufacturer's terms; dealer status does not guarantee free repair. Recalled products must follow the manufacturer's recall process.

Refund timing and exchanges

After we receive and inspect the return, we will notify you of approval or the reason it cannot be accepted. Approved refunds are issued to the original payment method within 10 business days of approval; your bank may take additional time to post them. Contact us if more than 15 business days have passed since approval. Exchanges require authorization and replacement availability; any price difference and applicable charges will be explained before processing.

Applicable rights and earlier purchases

This policy applies to online and in-store purchases. We will honor more favorable written return terms provided with an earlier purchase. Applicable consumer rights remain unaffected. Where the European Union 14-day cancellation right applies, customers may cancel or return eligible orders within 14 days of receipt, subject to applicable legal exceptions, without giving a reason.


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