Boat Adapters

Boat Plumbing Adapters
  • Attwood® - 3/4" Hose I.D. to 3/4"-14 NPS(F) Hose/Pipe Adapter
    Attwood® - 3/4" Hose I.D. to 3/4"-14 NPS(F) Hose/Pipe Adapter
    0
    # 5294032073
    3/4" Hose I.D. to 3/4"-14 NPS(F) Hose/Pipe Adapter by Attwood®. Threaded end fits 3888 drain fitting or A-Series aerator pump intakes and outlets. Acetal construction. This product is made of high-quality materials to serve you for...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $8.51 - $9.25
    Availability Varies - Depends on Product Options
  • Groco® - 1" Hose I.D. to 1" NPT(M) Hose/Pipe Adapter
    Groco® - 1" Hose I.D. to 1" NPT(M) Hose/Pipe Adapter
    0
    # 5294032569
    1" Hose I.D. to 1" NPT(M) Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
    High quality at an affordable priceExpertly made from premium materials
    $8.87 - $17.45
    Availability Varies - Depends on Product Options
  • Groco® - 1" NPS(F) to 1" NPT(M) Pipe/Pipe Adapter
    Groco® - 1" NPS(F) to 1" NPT(M) Pipe/Pipe Adapter
    0
    # 5294031772
    1" NPS(F) to 1" NPT(M) Pipe/Pipe Adapter by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials to serve you for years to...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $47.82 - $63.58
    Availability Varies - Depends on Product Options
  • Groco® - 1-1/2" Hose I.D. to 1-1/2" NPT(M) Hose/Pipe Adapter
    Groco® - 1-1/2" Hose I.D. to 1-1/2" NPT(M) Hose/Pipe Adapter
    0
    # 5294032194
    1-1/2" Hose I.D. to 1-1/2" NPT(M) Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...
    High quality at an affordable priceExpertly made from premium materials
    $19.78 - $29.36
    Availability Varies - Depends on Product Options
  • Groco® - 1-1/2" NPT(M) to 1-1/2" NPS(M) Pipe/Pipe Adapter
    Groco® - 1-1/2" NPT(M) to 1-1/2" NPS(M) Pipe/Pipe Adapter
    0
    # 5294032969
    1-1/2" NPT(M) to 1-1/2" NPS(M) Pipe/Pipe Adapter by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials to serve you for...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $69.82 - $77.04
    Availability Varies - Depends on Product Options
  • Groco® - 1-1/4" BSPP(M) to 1-1/4" BSPP(F) Pipe/Pipe Adapter
    Groco® - 1-1/4" BSPP(M) to 1-1/4" BSPP(F) Pipe/Pipe Adapter
    0
    # 5294031406
    1-1/4" BSPP(M) to 1-1/4" BSPP(F) Pipe/Pipe Adapter by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials to serve you for...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $53.89 - $68.07
    Availability Varies - Depends on Product Options
  • Groco® - 1-1/4" Hose I.D. to 1-1/4" NPT(M) Hose/Pipe Adapter
    Groco® - 1-1/4" Hose I.D. to 1-1/4" NPT(M) Hose/Pipe Adapter
    0
    # 5294033077
    1-1/4" Hose I.D. to 1-1/4" NPT(M) Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...
    High quality at an affordable priceExpertly made from premium materials
    $15.68 - $23.81
    Availability Varies - Depends on Product Options
  • Groco® - 2" Hose I.D. to 2" NPT(M) Hose/Pipe Adapter
    Groco® - 2" Hose I.D. to 2" NPT(M) Hose/Pipe Adapter
    0
    # 5294031884
    2" Hose I.D. to 2" NPT(M) Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
    High quality at an affordable priceExpertly made from premium materials
    $26.60 - $46.37
    Availability Varies - Depends on Product Options
  • Groco® - 2" NPS(F) to 2" NPT(M) Pipe/Pipe Adapter
    Groco® - 2" NPS(F) to 2" NPT(M) Pipe/Pipe Adapter
    0
    # 5294033065
    2" NPS(F) to 2" NPT(M) Pipe/Pipe Adapter by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials to serve you for years to...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $85.01 - $86.76
    Availability Varies - Depends on Product Options
  • Groco® - 3/4" Hose I.D. to 3/4" NPT(M) Hose/Pipe Adapter
    Groco® - 3/4" Hose I.D. to 3/4" NPT(M) Hose/Pipe Adapter
    0
    # 5294032639
    3/4" Hose I.D. to 3/4" NPT(M) Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
    High quality at an affordable priceExpertly made from premium materials
    $6.14 - $12.70
    Availability Varies - Depends on Product Options
  • Groco® - 3/4" NPS(F) to 3/4" NPT(M) Pipe/Pipe Adapter
    Groco® - 3/4" NPS(F) to 3/4" NPT(M) Pipe/Pipe Adapter
    0
    # 5294031933
    3/4" NPS(F) to 3/4" NPT(M) Pipe/Pipe Adapter by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials to serve you for years...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $44.02 - $58.34
    Availability Varies - Depends on Product Options
  • Midland Metal® - 1/2" Hose I.D. to 1/2" MIP(M) Hose/Pipe Adapter
    Midland Metal® - 1/2" Hose I.D. to 1/2" MIP(M) Hose/Pipe Adapter
    0
    # 5299965674
    1/2" Hose I.D. to 1/2" MIP(M) Hose/Pipe Adapter by Midland Metal®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $2.68 - $4.47
    Availability Varies - Depends on Product Options
  • Attwood® - 1/4" NPT(F) to 5/16" Hose I.D Brass Hose/Pipe Adapter
    Attwood® - 1/4" NPT(F) to 5/16" Hose I.D Brass Hose/Pipe Adapter (88FBM101-6)
    0
    # mpn4679789264
    1/4" NPT(F) to 5/16" Hose I.D Brass Hose/Pipe Adapter by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $3.36
    In Stock - Ships within 24 hrs
  • Attwood® - 3/4" Hose I.D. to 3/4"-14 NPS(F) Plastic White Hose/Pipe Adapter, Aftermarket
    Attwood® - 3/4" Hose I.D. to 3/4"-14 NPS(F) Plastic White Hose/Pipe Adapter, Aftermarket (3899-3)
    0
    # mpn4489524269
    3/4" Hose I.D. to 3/4"-14 NPS(F) Plastic White Hose/Pipe Adapter, Aftermarket (3899-3) by Attwood®. Threaded end fits 3888 drain fitting or A-Series aerator pump intakes and outlets. Acetal construction. This product is made of...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $8.51
    In Stock - Ships within 24 hrs
  • Flojet® - 1/2" Hose I.D. to Snap-In Port Plastic Black Adapter with EPDM O-Ring
    Flojet® - 1/2" Hose I.D. to Snap-In Port Plastic Black Adapter with EPDM O-Ring (20381002)
    0
    # mpn2431712
    1/2" Hose I.D. to Snap-In Port Plastic Black Adapter with EPDM O-Ring by Flojet®. 2 Pieces Quad. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $6.60
    In Stock - Ships in 24 to 48 hrs
  • Flojet® - 3/4" EPDM Snap-In Quad Port Kit
    Flojet® - 3/4" EPDM Snap-In Quad Port Kit (20381-006)
    0
    # mpn4952495179
    3/4" EPDM Snap-In Quad Port Kit by Flojet®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $6.60
    In Stock - Ships in 24 to 48 hrs
  • Flow-Rite® - 3/4" Plastic Black Qwik-Lok Socket
    Flow-Rite® - 3/4" Plastic Black Qwik-Lok Socket (MPA-014)
    0
    # mpn1589901100
    3/4" Plastic Black Qwik-Lok Socket by Flow-Rite®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $6.52
    In Stock - Ships in 24 to 48 hrs
  • Forespar® - 1" Hose I.D. to 1" NPS(M) Marelon Black Hose/Pipe Adapter
    Forespar® - 1" Hose I.D. to 1" NPS(M) Marelon Black Hose/Pipe Adapter (905008)
    0
    # mpn1438154385
    1" Hose I.D. to 1" NPS(M) Marelon Black Hose/Pipe Adapter by Forespar®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $7.56
    In Stock - Ships in 24 to 48 hrs
  • Forespar® - 1-1/2" Hose I.D. to 1-1/2" NPS(M) Marelon Black Hose/Pipe Adapter
    Forespar® - 1-1/2" Hose I.D. to 1-1/2" NPS(M) Marelon Black Hose/Pipe Adapter (905010)
    0
    # mpn1438154383
    1-1/2" Hose I.D. to 1-1/2" NPS(M) Marelon Black Hose/Pipe Adapter by Forespar®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $7.96
    In Stock - Ships in 24 to 48 hrs
  • Forespar® - 1-1/4" Hose I.D. to 1-1/4" Male Marelon Black Hose/Pipe Adapter
    Forespar® - 1-1/4" Hose I.D. to 1-1/4" Male Marelon Black Hose/Pipe Adapter (905009)
    0
    # mpn1438154384
    1-1/4" Hose I.D. to 1-1/4" Male Marelon Black Hose/Pipe Adapter by Forespar®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $7.56
    In Stock - Ships in 24 to 48 hrs
  • Forespar® - 1-1/8" Hose I.D. to 1" NPT(M) Plastic Black Hose/Pipe Adapter
    Forespar® - 1-1/8" Hose I.D. to 1" NPT(M) Plastic Black Hose/Pipe Adapter (905016)
    0
    # mpn4699215641
    1-1/8" Hose I.D. to 1" NPT(M) Plastic Black Hose/Pipe Adapter by Forespar®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $7.96
    In Stock - Ships in 24 to 48 hrs
  • Forespar® - 1/2" Hose I.D. to 1/2" Male Marelon Black Hose/Pipe Adapter
    Forespar® - 1/2" Hose I.D. to 1/2" Male Marelon Black Hose/Pipe Adapter (905006)
    0
    # mpn1438154387
    1/2" Hose I.D. to 1/2" Male Marelon Black Hose/Pipe Adapter by Forespar®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $4.36
    In Stock - Ships in 24 to 48 hrs
  • Forespar® - 3/4" Hose I.D. to 3/4" NPT(M) Marelon Black Hose/Pipe Adapter
    Forespar® - 3/4" Hose I.D. to 3/4" NPT(M) Marelon Black Hose/Pipe Adapter (905007)
    0
    # mpn1438154386
    3/4" Hose I.D. to 3/4" NPT(M) Marelon Black Hose/Pipe Adapter by Forespar®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $4.36
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1" Hose I.D. to 1" NPT(M) Bronze Hose/Pipe Adapter
    Groco® - 1" Hose I.D. to 1" NPT(M) Bronze Hose/Pipe Adapter (PTH-1000)
    0
    # mpn4620924846
    1" Hose I.D. to 1" NPT(M) Bronze Hose/Pipe Adapter (PTH-1000) by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...
    C83600 BronzeStandard Flow
    $8.87
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1" Hose I.D. to 3/4" NPT(M) Bronze Hose/Pipe Adapter
    Groco® - 1" Hose I.D. to 3/4" NPT(M) Bronze Hose/Pipe Adapter (FF-750)
    0
    # mpn4620924758
    1" Hose I.D. to 3/4" NPT(M) Bronze Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
    Full FlowMale NPT x Hose connection
    $10.55
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1" NPS(F) to 1" NPT(M) Bronze Pipe/Pipe Adapter
    Groco® - 1" NPS(F) to 1" NPT(M) Bronze Pipe/Pipe Adapter (IBVF-1000)
    0
    # mpn4620924827
    1" NPS(F) to 1" NPT(M) Bronze Pipe/Pipe Adapter (IBVF-1000) by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials to serve...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $47.82
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1-1/2" Hose I.D. to 1-1/2" NPS(F) Bronze Hose/Pipe Adapter
    Groco® - 1-1/2" Hose I.D. to 1-1/2" NPS(F) Bronze Hose/Pipe Adapter (TP-1500)
    0
    # mpn4620924934
    1-1/2" Hose I.D. to 1-1/2" NPS(F) Bronze Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...
    Expertly crafted from premium materialsHigh quality at a budget-friendly price
    $44.02
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1-1/2" Hose I.D. to 1-1/2" NPT(M) Bronze Hose/Pipe Adapter
    Groco® - 1-1/2" Hose I.D. to 1-1/2" NPT(M) Bronze Hose/Pipe Adapter (PTH-1500)
    0
    # mpn4620924851
    1-1/2" Hose I.D. to 1-1/2" NPT(M) Bronze Hose/Pipe Adapter (PTH-1500) by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It...
    C83600 BronzeStandard Flow
    $19.78
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1-1/2" Hose I.D. to 1-1/4" NPT(M) Bronze Hose/Pipe Adapter
    Groco® - 1-1/2" Hose I.D. to 1-1/4" NPT(M) Bronze Hose/Pipe Adapter (FF-1250)
    0
    # mpn4620924752
    1-1/2" Hose I.D. to 1-1/4" NPT(M) Bronze Hose/Pipe Adapter by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...
    Full FlowMale NPT x Hose connection
    $21.09
    In Stock - Ships in 24 to 48 hrs
  • Groco® - 1-1/2" NPT(M) to 1-1/2" NPS(M) Bronze Pipe/Pipe Adapter
    Groco® - 1-1/2" NPT(M) to 1-1/2" NPS(M) Bronze Pipe/Pipe Adapter (IBVF-1500)
    0
    # mpn4620924829
    1-1/2" NPT(M) to 1-1/2" NPS(M) Bronze Pipe/Pipe Adapter (IBVF-1500) by Groco®. Patented IBVF Flanged Adaptors have been developed to address several common problems in the marine industry. This product is made of high-quality materials...
    Eliminate dangerous thread miss-match when in-line valves are screwed onto thru hullsAccept standard thru-hulls into the base and standard in-line valves on top
    $69.82
    In Stock - Ships in 24 to 48 hrs




Depending on its type and application, a boat may contain different piping systems designed for bilge water removal, fresh and potable water supply, sanitary purposes, livewell, etc. All of these systems require regular inspection and maintenance, and in order to rebuild or restore them, you may need to replace some metal or plastic fittings and adapters. Such parts are typically installed in places where pipes pass through the hull or deck, change direction, or connect to various equipment, and all of them have to meet certain standards and marine regulations.

For instance, it's not recommended to use nylon thru-hulls and other plastic fittings at or below the waterline. In our online store, you can find a large assortment of elbows, couplings, tees, thru-hull fittings, in-line valves, and other products used for marine plumbing. Sourced from leading brands, they are available in numerous sizes and comply with the necessary regulations. However, before ordering any of them, make sure the thread of your line complies with our fittings. Most of them are made in accordance with national thread standards such as NPT, NPS, or their sub-types (MPT, FPT, etc.) Featuring a parallel or tapered thread, they are not compatible with British standards (such as BSPT or BSPP) that are more spread in Europe.

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