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Forespar MF850 Marelon Threaded Ball Valve

Forespar MF850 Marelon Threaded Ball Valve

  • Select Inlet / Outlet Threads (Female Pipe Thread)
  • Material: Marelon, Length: 3", Length with Handle: 4"
  • Marelon Exceeds Marine UL / ABYC Standards for Above and Below Waterline
  • Item #: 
    Model #: 
    Multiple Sizes Available
    Our Price:
    From: $37.99  To: $158.99
    37.99 158.99
    Please enter quantity below.
    Inlet/Outlet Threads
    Model #
    Shipping Weight
    1/2 Inch FPT
      0.25 Lbs.
      *In Stock!*
    Our Price: $37.99
    3/4 Inch FPT
      0.25 Lbs.
      *In Stock!*
    Our Price: $43.99
    1 Inch FPT
      0.75 Lbs.
      *In Stock!*
    Our Price: $98.99
    1-1/4 Inch FPT
      0.80 Lbs.
    Our Price: $102.99
    1-1/2 Inch FPT
      1.20 Lbs.
    Our Price: $128.99
    2 Inch FPT
      1.90 Lbs.
    Our Price: $158.99
    Click the "More Info" button above for specific information about that product.


    • Threaded Ball Valve
    • Marelon fittings are popular with many top quality boat builders worldwide
    • Marelon® is a proprietary formulation of polymer composite compounds using composite reinforced polymer and additives to produce a superior marine-grade product
      • Designed for use above and below the waterline
      • Complete freedom from corrosion
      • High strength
      • UV Stabilized
      • Will not freeze or become brittle with age or temperature extremes
      • U.L. and A.B.Y.C. approved
      • Marelon fittings can be installed using the same techniques and materials as bronze fittings
      • Marelon® is a registered trademark of Forespar Products Corp.

    Click Here to See More Information about Marelon

    General Note: Forespar threaded plumbing fittings (like most true marine plumbing fittings) use NPSM Threads - National Standard Free-Fitting Straight Mechanical Pipe Thread. NPT - National Pipe Threads are tapered, NPSM Threads are parallel. The two types are not designed to work together.

    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


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