Plastiflex Inlet Valve Extension for MD Central Vacuum – Part# 614

Plastiflex Inlet Valve Extension for MD Central Vacuum – Part# 614

Available: In Stock
$1.52
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Quick Summary

This inlet valve extension helps when the wall is too thick for the mounting plate in the wall and wall plate to meet. Each extension adds 3/4 inch and can be cut to a shorter size as needed.

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

Quick Highlights

  • Used when wall thickness prevents proper plate alignment
  • Each extension adds 3/4 inch
  • Can be cut to shorter sizes
  • Longer screws will also be needed
  • Fits many central vacuum brands listed in compatibility note
  • Part number 614

Product Overview

The inlet valve extension is used when a wall is too thick and the mounting plate in the wall and the wall plate do not meet correctly. It provides extra reach so the inlet connection can be completed.

Each extension adds 3/4 inch, and it can be trimmed to a shorter length if needed for the installation. Longer screws are required and are not included in the provided details.

This part is listed with compatibility for AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore, and Eureka.


Key Features

  • For thick wall installations: Use this extension when wall thickness prevents the mounting plate and wall plate from meeting.
  • Adds extra depth: Each extension adds 3/4 inch to help bridge the gap.
  • Trimmable design: The extension can be cut to shorter sizes if less depth is needed.
  • Multiple extensions can be used: Use as many of these as needed for the wall thickness in your installation.
  • Screw note: Longer screws will be needed when using this extension.
  • Broad listed compatibility: The compatibility note lists many central vacuum brands including Modern Day, Beam, Nutone, Electrolux, and Vacuflo.

MD Compatibility

This product is listed for MD (Modern Day) central vacuum systems. Fit can depend on your hose, inlet type and system age, so confirm your setup before ordering or call Ace Vacuums for help.


Technical Specifications

Specification Details
Brand Plastiflex
Part Number 614
Extension Added 3/4 inch each
Large End Inner Diameter 1-5/8 inch
Large End Outer Diameter 1-7/8 inch
Small End Inner Diameter 1-1/2 inch
Small End Outer Diameter 1-5/8 inch
Compatibility AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore, and Eureka
Authorized Dealer Ace Vacuums

Best For

  • Thick wall inlet installations
  • Bridging the gap between the mounting plate and wall plate
  • Installations that need an extra 3/4 inch of depth
  • Setups where a shorter custom length may be needed

Not Ideal For

  • Projects where longer screws are not available
  • Situations where inlet dimensions or system fit have not been confirmed
  • Installations that do not need added wall depth

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 Plastiflex Inlet Valve Extension 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 inlet valve extension helps when the wall is too thick for the mounting plate in the wall and wall plate to meet. Each extension adds 3/4 inch and can be cut to a shorter size as needed.

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

Quick Highlights

  • Used when wall thickness prevents proper plate alignment
  • Each extension adds 3/4 inch
  • Can be cut to shorter sizes
  • Longer screws will also be needed
  • Fits many central vacuum brands listed in compatibility note
  • Part number 614

Product Overview

The inlet valve extension is used when a wall is too thick and the mounting plate in the wall and the wall plate do not meet correctly. It provides extra reach so the inlet connection can be completed.

Each extension adds 3/4 inch, and it can be trimmed to a shorter length if needed for the installation. Longer screws are required and are not included in the provided details.

This part is listed with compatibility for AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore, and Eureka.


Key Features

  • For thick wall installations: Use this extension when wall thickness prevents the mounting plate and wall plate from meeting.
  • Adds extra depth: Each extension adds 3/4 inch to help bridge the gap.
  • Trimmable design: The extension can be cut to shorter sizes if less depth is needed.
  • Multiple extensions can be used: Use as many of these as needed for the wall thickness in your installation.
  • Screw note: Longer screws will be needed when using this extension.
  • Broad listed compatibility: The compatibility note lists many central vacuum brands including Modern Day, Beam, Nutone, Electrolux, and Vacuflo.

MD Compatibility

This product is listed for MD (Modern Day) central vacuum systems. Fit can depend on your hose, inlet type and system age, so confirm your setup before ordering or call Ace Vacuums for help.


Technical Specifications

Specification Details
Brand Plastiflex
Part Number 614
Extension Added 3/4 inch each
Large End Inner Diameter 1-5/8 inch
Large End Outer Diameter 1-7/8 inch
Small End Inner Diameter 1-1/2 inch
Small End Outer Diameter 1-5/8 inch
Compatibility AirMaster, Modern Day, SilentMaster, Flo-Master, Beam, Nutone, Electrolux, Vacuflo, Kenmore, and Eureka
Authorized Dealer Ace Vacuums

Best For

  • Thick wall inlet installations
  • Bridging the gap between the mounting plate and wall plate
  • Installations that need an extra 3/4 inch of depth
  • Setups where a shorter custom length may be needed

Not Ideal For

  • Projects where longer screws are not available
  • Situations where inlet dimensions or system fit have not been confirmed
  • Installations that do not need added wall depth

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 Plastiflex Inlet Valve Extension 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 is this inlet valve extension used for?

It is used when the wall is too thick and the mounting plate in the wall and wall plate do not meet.

How much length does each extension add?

Each extension adds 3/4 inch.

Can this extension be cut shorter?

Yes. It can be cut to shorter sizes.

Can I use more than one extension?

Yes. The description says to use as many as needed when the wall is too thick.

Do I need anything else for installation?

Yes. Longer screws will be needed as well.

Will this fit my MD central vacuum?

It may fit, especially since Modern Day is listed in the compatibility note, but you should confirm your inlet type and dimensions before ordering if you are not certain.

What are the diameters of this extension?

The large end inner diameter is 1-5/8 inch and outer diameter is 1-7/8 inch. The small end inner diameter is 1-1/2 inch and outer diameter is 1-5/8 inch.

Which brands are listed as compatible?

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

Visit Our Showrooms

Check real-time traffic and travel time from your location in VA, DC, or MD.

📍 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.

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📍 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

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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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For 25+ years, Ace Vacuums has filled the gap left by big-box retailers. We provide the expert repairs, warranty support, and genuine OEM parts that Amazon and Walmart simply don't offer. From free estimates to same-day service, we are your local alternative for professional home care solutions.

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