Defender US
Free Shipping on orders over $99*

Valves

59 Listed

  1. Groco SBV-P Series Bronze Flanged Seacock with Side Port

    $530.99 - $2,959.99

  2. Groco BV Series Full-Flow Ball-Type Seacock

    $221.99 - $3,705.99
    4

  3. Groco 6 Port Bronze Fuel Valve - FV-65038

    $168.99

  4. Perko Bronze Seacock Body

    $144.99 - $501.99
    1

  5. Apollo Conbraco Full Flow Sea Flange Valve

    $136.99 - $809.99
    2

  6. Forespar Pro Series Thru-Hull Plug Dual Drain Seacock with Mushroom Thru-Hull

    $113.99 - $263.99

  7. Forespar Pro Series Flush Cap Dual Drain NPSM Thread Seacock

    $107.96 - $259.96

  8. Forespar Pro Series Thru-Hull Plug Y-Valve Seacock

    $103.96 - $263.96

  9. Forespar Pro Series Thru-Hull Plug Dual Drain Seacock

    $103.96 - $263.96

  10. Forespar Marelon Full-Flow Seacock with Stainless Cap Thru-Hull

    $100.76 - $223.96

  11. Whale Diverter Y-Valve - DV5606

    $93.99
    0

  12. Forespar Marelon Full-Flow Seacock with Mushroom Thru-Hull

    $92.76 - $215.96
    7

  13. Raritan Diverter Y Valve

    $90.99 - $114.99

  14. Forespar 93-Series Marelon Threaded Ball Valve

    $87.16 - $175.96
    0

  15. Jabsco Diverter Y-Valve - 45490-1000

    $82.99
    5

  16. Groco FV Series Tank Selector Valve

    $81.99 - $246.99

  17. Forespar Pro Series Flush Cap Inline Valve Screened Seacock

    $79.96 - $215.96

  18. Forespar Marelon 93 Series Ball Valve/Mushroom Thru-Hull Fitting

    $79.96 - $175.96
    1

  19. Racor Shut-Off Valve Drain Kit - RK 19492

    $78.99
    2

  20. Johnson Y-Valve - 81-47238-01

    $70.99

  21. Vetus Bronze Ball Valve

    $68.99 - $214.99

  22. Forespar Pro Series Thru-Hull Plug Inline Valve Seacock

    $66.99 - $215.96
  23. 20% off

    Apollo Conbraco 3-Way Diverter Valve

    $60.99 - $280.99
    $60.99 - $224.79
    1

  24. Forespar MF 849 Marelon Seacock

    $59.16 - $139.96
    1

  25. Groco FBV Series Bronze Flanged Seacock

    $57.99 - $484.99
    12

  26. Forespar MF-Series Diverter Y-Valve Connector

    $56.76 - $71.96
    4

  27. Apollo Conbraco Fuel Valve Shut Off

    $52.99
    0

  28. Moeller 3 Way Fuel Valve - 033312-10

    $48.99
    2
  29. 30% off

    Apollo Conbraco Shut Off Valve

    $46.99 - $353.99
    $46.99 - $353.99
    1

  30. Forespar MF850 Marelon Threaded Ball Valve

    $42.36 - $180.76
    7

  31. Jabsco Y Valve Service Kit - 45488-0000

    $41.99
    2

  32. Groco BB Series Backing Block

    $41.99 - $79.99
    5

  33. Groco IBV-S Series Stainless Steel Inline Ball Valve

    $40.99 - $576.99

  34. Groco IBVF Series Flanged Adapter

    $38.99 - $199.99
    2

  35. Groco Bronze 3-Way Valve

    $38.99 - $182.99
    4

  36. Beckson Hose Inline Check Valve - 1 1/2" - CV-1-1/2

    $37.99
    1

  37. Whitecap Fuel Shut-Off Valve - P-5524

    $36.99
    0

  38. Whitecap Fuel Shut-Off Valve - P-5523

    $35.99
    0

  39. Vetus Stainless Steel Ball Valve

    $35.99 - $256.99

  40. Whitecap Fuel Shut-Off Valve - P-5520

    $32.99
    3

  41. Whitecap Fuel Shut-Off Valve - P-5521

    $30.99
    0

  42. Moeller Fuel Shut-Off Valve - 033306-10

    $28.99
    1

  43. Groco IBV Series BSPP Bronze Inline Ball Valve

    $28.99 - $510.99
    3

  44. T-H Marine Inline Scupper Check Valve

    $25.99
    2

  45. Forespar Y-Connector

    $24.76 - $26.36
    0

  46. Whitecap Fuel Shut-Off Valve - P-5522

    $23.99
    0

  47. Whale Non-Return Valve - LV1215

    $23.99
    1

  48. Jabsco In-Line Check Valve

    $22.99 - $29.99
    4
 
1 / 2Next

About Valves

Marine Y-Valves

Marine Y Valves for boat toilets and marine 3 way valves for water applications above and below the waterline. For water use or mairine toilets, Defender Marine offers several marine 3-way valves and connectors. Service kits are also available for updating and fixing boat Y-valves at home. Above or below the waterline Defender has got you covered!

1Filters

Clear All
  1. Fulfillment: Ships Same Day ×
Manufacturer
Price
10.52
531.99
More Ways To Shop
Availability
Fulfillment

Change Locale

United States - English Shop in currency: USD
Canada - English Shop in currency: CAD
Canada - Français Shop in currency: CAD

Explore

Guides
Brands

Helpful Information

Track My Order
Shipping Policy
Return Policy
Outlet Store
Commercial Accounts

Get In Touch

Customer Service
1-800-435-7180
Send a Message

Resources

Gift Cards
Privacy Policy
Conditions of Use
Accessibility Statement

Stay Connected

X
Facebook
Instagram
YouTube
Toggle desktop/mobile version
2026 © Defender. All Rights Reserved.