Defender Home Page
Phone: 800-628-8225 Fax: 800-654-1616 Int'l.: 860-701-3400 Email: Contact Us
follow me on facebook
Shipping Info
no sales tax Defender Home Page
Your Cart

View Cart View Shopping Cart
Check My Order(s)
Track My Package(s)
Conversion Chart
Shopping Areas
Boats & Motors
 Defender Seal

Vetus NLP3 Waterlock Marine Muffler

  • Capacity: 1 Gallon (4 Liter), Select Exhaust Hose ID
  • Dimensions: Overall Length: 772 mm, Body Only Length: 520 mm
  • Unique Three Chamber Construction Reduces Sound Better
  • Item #: 
    Model #: 
    Shipping Weight: 
    5.00 Lbs.
    List Price: 
    Our Price:
    Please enter quantity below.
    Exhaust Hose ID
    Model #
    1-9/16 Inch (40 MM)
    Our Price: $259.99
    1-12/16 Inch (45 MM)
      *In Stock!*
    Our Price: $259.99
    2 Inch (51 MM)
      *In Stock!*
    Our Price: $259.99
    Click the "More Info" button above for specific information about that product.

    Click Here for Vetus Exhaust System Information


    • Maximum sound reduction The NLP3 waterlock / muffler is the quietest in the world
    • Due to its unique three chamber construction the sound attenuation is an incredible 10 dB more than that achieved with a two chamber waterlock
      • No other waterlock on the market reduces the sound better
    • The NLP3 has rotatable chambers as well as rotatable hose connections
      • Ensuring quick and simple installation in even the most confined spaces
    • Dimensions:
      • Overall Length (Including Inlet and Outlet): 772 mm
      • Body Only Length: 520 mm
    • Available Hose Connections Diameters:
      • 40 mm
      • 45 mm
      • 50 mm
    • Provided with drain plugs for winter storage
    • Straps to secure the waterlock to the boat are supplied as standard
    • Capacity 4 liters (1 Gallon)

    Imperial dimensions are approximate. The manufacturer built this product to metric specs.

    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to


    Have A Suggestion?

    Help us make our site better for everyone! Let us know you've found something wrong or frustrating on this page and we will improve it. Please mark each that apply.

    Product has been improperly categorized
    Page loads too slowly
    Product information is incorrect
    Page has errors or bugs
    Site is frustrating or difficult to use
    Product image is missing or wrong
    Cannot find my size
    Spelling errors on page
    Not enough product information

    Comments or Examples:
    Examples: Missing information such as dimensions and model number, typos, inaccuracies, etc...

    Please include your e-mail address below if you would like us to respond to your comments or questions.             

    Join Our Email List And Receive our Monthly Promotions
    Defender Email Specials
    Click Here For Our Privacy Policy