Reliable stern drain plugs for FJ, C420 and 420E sailboats proplug@usa.com San Francisco, CA
ProPlug home
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.

Order ProPlugsSee how they install

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

Fleet adoption

Trusted by Top Collegiate and High School Sailing Programs

  • Burgee of the St. Francis Yacht Club.

    St. Francis Yacht Club

  • Burgee of the Monterey Peninsula Yacht Club.

    Monterey Peninsula Yacht Club

  • Logo of the University of Hawai'i sailing team.

    University of Hawai'i Sailing Team

  • Burgee of Stevenson School sailing.

    Stevenson School

  • Burgee of the Encinal Yacht Club.

    Encinal Yacht Club

  • Burgee of the Bahia Corinthian Yacht Club.

    Bahia Corinthian Yacht Club

  • Burgee of the Long Beach Yacht Club.

    Long Beach Yacht Club

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.

Order ProPlugsContact us