Reliable stern drain plugs for FJ, C420 and 420E sailboats proplug@usa.com San Francisco, CA
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The stern of an FJ dinghy sailing upwind, with a ProPlug fitted in the transom drain.

Patent Pending

Ditch the Tennis Ball. Turn Heads on the Water.

We Use 100% Recyclable Plastic to Create Customizable Stern Plugs for Your Sailing Team.

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Trusted by Top Collegiate and High School Sailing Programs

St. Francis Yacht Club Monterey Peninsula Yacht Club University of Hawai'i Sailing Team Stevenson School Encinal Yacht Club Bahia Corinthian Yacht Club Long Beach Yacht Club

Product comparison

Tennis ball or ProPlug

A worn tennis ball wedged into the drain hole in the transom of an FJ.
What most boats use

Tennis Ball

  • Heavy and waterlogged after just a few sails
  • Bulky — sticks out farther than the bottom of the hull and affects hydrodynamics of your FJ
  • Detracts from the look of a well-kept, competitive sailboat
  • Made from cheap rubber and felt, not built for the marine environment
  • Looks sloppy — every boat ends up with a mismatched, soggy tennis ball
A white ProPlug fitted flush in a hull, engraved with the St. Francis Yacht Club burgee.
Patent pending

ProPlug™

  • 70% lighter than a tennis ball, never waterlogged
  • Locks in place with a secure, flush fit
  • Almost invisible — blends in with your hull
  • Made from 100% recyclable plastic — help save the waters you sail in
  • Clean, professional look that can be customized with text or a logo
  • Ultra-durable design — built to last season after season
A rotating 3D view of the ProPlug.

The part

ProPlug™ (Patent Pending)

Face diameter
60 mm
Overall depth
30.5 mm
Model
v5 Blank

Drag to turn it

Configure

Build your plug

Add your team name, or upload your burgee. What you see is what gets engraved.

Add to the face
Your logo

SVG or PNG, up to 2 MB. A PNG should have a transparent background.

Save the image, then attach it to the order form so we know exactly what to engrave.

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Options

Colors and custom engraving

ProPlugs are made in a range of colors and can be engraved with your team name, your logo, or a club burgee. Send us what you want on them when you place your order.

A row of ProPlugs laid out on a wooden bench in red, grey, white, blue, green and black.

Sustainability

Every Purchase Helps the Environment

At ProPlug, we believe sailors should give back to the waters that carry us. That’s why every plug is made from 100% recyclable ocean plastic — turning waste pulled from the sea into gear that keeps your boat dry and race-ready.

By choosing ProPlug, you’re not just upgrading your sailboat — you’re helping keep plastics out of the ocean and supporting a cleaner future for sailing.

Read about our recycling program
A diver swimming underwater among a school of fish.

Press

In the News

Order ProPlugs for your fleet

Tell us your boat class, how many plugs you need, and what you would like engraved on them.

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