Discourages air locks in your water-intake lines at high speeds. Keeps water flowing at low speeds and debris out at any speed. Includes integral thru-hull fitting. Marine UL-listed. Screw size: #8.
The West Advisor
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.