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Vetus NLP Waterlock Muffler

Vetus NLP Waterlock Muffler

  • Select Inlet / Outlet Hose ID, Capacity: Models Vary
  • Dimensions: See Diagrams Below
  • Dual Stage, 360 Degree Rotating Top Chamber and Connections
  • Item #: 
    Model #: 
    Multiple Models Available
    Shipping Weight: 
    8.00 Lbs.
    Our Price:
    From: $214.99  To: $349.99
    214.99 349.99
    Please enter quantity below.
    Inlet / Outlet Hose ID
    Model #
    Shipping Weight
    40 mm
    1.2 Gallons
      5.00 Lbs.
      *In Stock!*
    Our Price: $214.99
    45 mm
    1.2 Gallons
      5.00 Lbs.
    Our Price: $214.99
    51 mm
    1.2 Gallons
      5.00 Lbs.
      *In Stock!*
    Our Price: $214.99
    51 mm
    2.6 Gallons
      8.00 Lbs.
    Our Price: $349.99
    60 mm
    2.6 Gallons
      5.00 Lbs.
    Our Price: $349.99
    76 mm
    2.6 Gallons
      5.00 Lbs.
      *In Stock!*
    Our Price: $349.99
    90 mm
    2.6 Gallons
      5.00 Lbs.
      *In Stock!*
    Our Price: $349.99
    Click the "More Info" button above for specific information about that product.


    • The Vetus NLP waterlock mufflers dual stage construction provides superior silencing of exhaust noise with minimal back pressure
    • The rotating top section and connections make installation easy even in confined spaces
    • Separate upper and lower chambers with partition, horizontal plate and center riser tube provide better sound reduction then single chamber designs
    • Top chamber and inlet/ outlet connections rotate 360°
    • Drain plug makes winterizing easy
    • Includes nylon mounting straps to secure muffler to the boat
    • Meets ABYC Standards

    Vetus Exhaust System Information

    Note: Vetus recommends installation of a VETUS NLPG Muffler and gooseneck in the exhaust line, after the NLP waterlock for optimum silencing of exhaust noise.

    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

    Vetus Hose Connectors
    Item #: 305432
  • Fits Hose ID: 1-1/4" - 2-1/4"
  • Material: Synthetic
  • Cut Fitting to Accommodate Desired Hose ID
    Model #:
    Vetus Air Vent Anti Syphon Device With Valve
    Item #: 305425
  • Fits Hose ID: 1/2", 3/4", 1", and 1-1/4"
  • For Wet Exhaust Systems, Material: Synthetic, Air Bleed Connection: Rotating
  • Self-Contained
    Model #:
    Vetus Mounting Straps For Type NLP Waterlock Mufflers
    Item #: 305453
  • Fits Vetus: NLP40 - NLP90
  • Includes: Two Extra Long Nylon Ties and Mounting Clips
  • Choose Model Number
    From: $24.99
    To: $30.99
    Model #:
    Multiple Models Available
    Vetus Replacement 45° Hi-Temp Rotating Exhaust Hose Connection
    Item #: 305450
  • Select Fitting Outside Diameter
  • Applications: Vetus NLP, NLPH, NLPG, WLOCK, LSS and LSGS Units
  • Includes (2) O-Rings, Material: Synthetic
    Model #:
    Multiple Sizes Available
    Vetus Replacement Single Exhaust Hose Connection Set
    Item #: 305452
  • Angle: 45°, Type: Hi-Temp, Rotating, Includes Fastening Parts*
  • Material: Synthetic, Select Fitting Outside Diameter
  • Applications: Vetus NLP, NLPH, NLPG, LSG and LSGS Units
    Model #:
    Multiple Models Available

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