Achilles Valve Flapper (Diaphragm) | C3421

Achilles Inflatable Boat Parts | Valve Flapper - C3421

Achilles brand logo
SKU#
C3421
MSRP: $6.00
PRICE: $5.94
(You save $0.06 )
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Brand:
Achilles
MPN:
C3421
Category:
Achilles Parts
Type:
Air Valves and Components
Subtotal:
MSRP: $6.00
PRICE: $5.94
(You save $0.06 )
Available Options
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Rates are for quote purposes only and may not reflect actual shipping costs. Real-time rates will be provided at check-out. For shipping outside the US or a personalized quote, please call 805-644-6290. Shipping Terms
  • Description

    The Achilles C3421 valve flapper is the rubber diaphragm inside the air valve that keeps air in the tube when the cap is off.

    Achilles Valve Flapper works with the valve to form a one way refill valve. Removing the cap exposes the flapper, but prevents most of the air from escaping the tube chamber. The flapper can also be called a diaphragm. These are used on all Achilles models with exception of the SU series and Riverboats.

    Valve Specifications

    • Models Supported: All Achilles Models (Except SU Series and Riverboats)
    • Material: Rubber

    Parts & Accessories FAQ

    Will this fit my boat or motor?

    Check the part number and specs above against your owner's manual or the part you're replacing. Still not sure? Call or text (805) 644-6290 ext. 3 with your boat or motor make, model, year and serial number, and our parts team will confirm the fit before you order.

    Do you ship?

    Yes. We ship parts and accessories nationwide, and shipping is calculated at checkout. Some items, like glues and sealants, can only ship by ground.

    Can I pick it up in person?

    Yes. Order by phone and pick it up at our Ventura, CA parts counter. Call or text (805) 644-6290 ext. 3 so we can have it ready.

    What is your return policy?

    See our Terms of Sale for return details. If you have any questions before ordering, call or text (805) 644-6290 ext. 3.

    Can you install it?

    Installation is available on a case-by-case basis for customers local to our service centers. Call or text (805) 644-6290 ext. 3 to see if we can help with your project, or book an appointment online.

    Can't find the part you need?

    Use our Request a Part form or call or text (805) 644-6290 ext. 3. Our parts team will do its best to track it down, but we can’t guarantee every part is still available.

    Why Buy from Boat Specialists

    • Family owned and operated in Ventura, CA since 1976
    • A knowledgeable parts team that can confirm fit before you order
    • Certified technicians at our Ventura service center
    • We ship nationwide

    Questions? Call or text (805) 644-6290 ext. 3 to reach our parts team.

The Achilles C3421 valve flapper is the rubber diaphragm inside the air valve that keeps air in the tube when the cap is off.

Achilles Valve Flapper works with the valve to form a one way refill valve. Removing the cap exposes the flapper, but prevents most of the air from escaping the tube chamber. The flapper can also be called a diaphragm. These are used on all Achilles models with exception of the SU series and Riverboats.

Valve Specifications

  • Models Supported: All Achilles Models (Except SU Series and Riverboats)
  • Material: Rubber

Parts & Accessories FAQ

Will this fit my boat or motor?

Check the part number and specs above against your owner's manual or the part you're replacing. Still not sure? Call or text (805) 644-6290 ext. 3 with your boat or motor make, model, year and serial number, and our parts team will confirm the fit before you order.

Do you ship?

Yes. We ship parts and accessories nationwide, and shipping is calculated at checkout. Some items, like glues and sealants, can only ship by ground.

Can I pick it up in person?

Yes. Order by phone and pick it up at our Ventura, CA parts counter. Call or text (805) 644-6290 ext. 3 so we can have it ready.

What is your return policy?

See our Terms of Sale for return details. If you have any questions before ordering, call or text (805) 644-6290 ext. 3.

Can you install it?

Installation is available on a case-by-case basis for customers local to our service centers. Call or text (805) 644-6290 ext. 3 to see if we can help with your project, or book an appointment online.

Can't find the part you need?

Use our Request a Part form or call or text (805) 644-6290 ext. 3. Our parts team will do its best to track it down, but we can’t guarantee every part is still available.

Why Buy from Boat Specialists

  • Family owned and operated in Ventura, CA since 1976
  • A knowledgeable parts team that can confirm fit before you order
  • Certified technicians at our Ventura service center
  • We ship nationwide

Questions? Call or text (805) 644-6290 ext. 3 to reach our parts team.

Disclaimer: Images displayed on this site are for illustrative purposes only and may not accurately reflect the exact boat or outboard model available. Specifications, features, and configurations can vary. We strongly recommend reviewing all details with a member of our sales team to ensure clarity before purchase or deposit.

Additional Prep/DMV Info

Dealer Engine Prep

Dealer Engine Prep is required to validate the warranty and ensure a working engine. Prep includes completing a full Original Equipment Manufacturer (OEM) checklist, test-run performed in a tank for quality assurance, and re-crating for shipment. Outboards picked up in-store may be stand-alone and no longer in the box or crate.

Pre-Delivery Inspection

Pre-delivery Inspection is required to validate the warranty and includes the necessary services & products used on each new vessel to ensure quality performance prior to delivery.

For rigged vessels: Boat Specialists will install a deep cycle marine battery, rig all steering components, and complete an electrical and systems check. A full system check includes filling the motor with oil, fluids, and fuel, then a test run performed in a tank for quality assurance.

Once everything is tuned and prepared, a sea trial is performed to achieve the ideal RPM-to-top-speed ratio, ensuring the boat gets on plane properly and all systems operate on water. Afterward, full detail is performed on the exterior, deck, and hull to be turn-key ready for the customer.

DMV Registration On Boats and Trailers - For California Residents Only

Boat Specialists will take care of your CA DMV registration including signing a Power of Attorney for each registration. We will mail temporary paperwork with the documents that require the customer's signature. The customer is to sign and return the documents in the envelope provided. Once we have received the paperwork, we will submit all required documents to the DMV to complete registration.

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