Marine Plumbing & Ventilation - Thru-Hull Fittings

98 products


  • Attwood White Plastic 90 Degree Thru-Hull Connector - 3/4" Inner Diameter [3877-3]

    Attwood White Plastic 90 Degree Thru-Hull Connector - 3/4" Inner Diameter [3877-3]

    White Plastic 90 Degree Thru-Hull Connector - 3/4" Inner Diameter90° Thru-Hulls are ideal for tight installations, such as livewell overflow drains. The angled design also eliminates hose kinking.Specifications: Fits Hose Size: (inch) 3/4"inner diameter Max Hull Thickness: (inch) 1" Flange Diameter: (inch) 1-1/2" Installation Hole Size: (inch) 1" Drain Plug: (inch) 1/2" Color: White *Plastic Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 3/4" Material: Plastic Box Dimensions: 1"H x 2"W x 3"L WT: 0.2 lbs UPC: 022697387738 Quick Guide (pdf)

    $12.50

  • Sale -25% Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter [66545-3]

    Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter [66545-3]

    Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter Polish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance All visible areas are polished to a mirror finish, then passivate each part for additional protection Thick steel sidewalls withstand continual stress and hose flexing Faster, Simpler Installation: Each Thru-Hull is available with a new silicone gasket A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull The barbed tail ends provide plenty of room to hold multiple clamps Stainless Steel Straight Thru-Hulls, BarbedShort Thread is a more compact size, which allows installation near corners and in confined areasSpecifications: Hose size: (inch) 1-1/2" inner diameter Flange Diameter: (inch) 3" Thread O.D. (outside diameter): (inch) 1-7/8"  Thread Length: (inch) 1-1/4" Barb Length: (inch) 1-1/2" Total Length: (inch) 3-1/8" Install Hole Saw Size: (inch) 2"  Thread NPSM: (inch) 1-1/2" Max Hull Thickness: (inch) 5/8" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 1-1/2" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 3"L WT: 1.2 lbs UPC: 022697665454 Quick Guide (pdf)

    $61.99$46.50

  • Sale -24% Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter [66551-3]

    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter [66551-3]

    Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner DiameterPolish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance All visible areas are polished to a mirror finish, then passivate each part for additional protection Thick steel sidewalls withstand continual stress and hose flexing Faster, Simpler Installation: Each Thru-Hull is available with a new silicone gasket A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull The barbed tail ends provide plenty of room to hold multiple clamps Stainless Steel Straight Thru-Hulls, BarbedStandard Thread model has a full-length thread for thick hulls and easy tighteningSpecifications: Hose size: (inch) 1-1/2" inner diameter Flange Diameter: (inch) 3" Thread O.D. (outside diameter): (inch) 1-7/8"  Thread Length: (inch) 2-1/2" Barb Length: (inch) 1-1/4" Total Length: (inch) 4-1/8" Install Hole Saw Size: (inch) 2"  Thread NPSM: (inch) 1-1/2" Max Hull Thickness: (inch) 1-7/8" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 1-1/2" Material: Stainless Steel Box Dimensions: 3"H x 5"W x 8"L WT: 1.55 lbs UPC: 022697665515 Quick Guide (pdf)

    $59.99$45.50

  • Sale -9% Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner Diameter [66546-3]

    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner Diameter [66546-3]

    Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner DiameterPolish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance All visible areas are polished to a mirror finish, then passivate each part for additional protection Thick steel sidewalls withstand continual stress and hose flexing Faster, Simpler Installation: Each Thru-Hull is available with a new silicone gasket A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull The barbed tail ends provide plenty of room to hold multiple clamps Stainless Steel Straight Thru-Hulls, BarbedStandard Thread model has a full-length thread for thick hulls and easy tighteningSpecifications: Hose size: (inch) 5/8" inner diameter Flange Diameter: (inch) 1-7/8" Thread O.D. (outside diameter): (inch) 1"  Thread Length: (inch) 2" Barb Length: (inch) 1-1/4" Total Length: (inch) 3-3/4" Install Hole Saw Size: (inch) 1-1/8"  Thread NPSM: (inch) 3/4" Max Hull Thickness: (inch) 1-1/16" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 5/8" Material: Stainless Steel Box Dimensions: 2"H x 3"W x 6"L WT: 0.5 lbs UPC: 022697665461 Quick Guide (pdf)

    $27.99$25.50

  • Sale -12% Attwood Stainless Steel Thru-Hull Short Straight Barbed - 3/4" Inner Diameter [66541-3]

    Attwood Stainless Steel Thru-Hull Short Straight Barbed - 3/4" Inner Diameter [66541-3]

    Stainless Steel Thru-Hull Short Straight Barbed - 3/4" Inner DiameterPolish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance All visible areas are polished to a mirror finish, then passivate each part for additional protection Thick steel sidewalls withstand continual stress and hose flexing Faster, Simpler Installation: Each Thru-Hull is available with a new silicone gasket A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull The barbed tail ends provide plenty of room to hold multiple clamps Stainless Steel Straight Thru-Hulls, BarbedShort Thread is a more compact size, which allows installation near corners and in confined areasSpecifications: Hose size: (inch) 3/4" inner diameter Flange Diameter: (inch) 1-7/8" Thread O.D. (outside diameter): (inch) 1"  Thread Length: (inch) 1" Barb Length: (inch) 1" Total Length: (inch) 2-1/2" Install Hole Saw Size: (inch) 1-1/8"  Thread NPSM: (inch) 3/4" Max Hull Thickness: (inch) 5/8" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 3/4" Material: Stainless Steel Box Dimensions: 2"H x 3"W x 6"L WT: 0.4 lbs UPC: 022697665416 Quick Guide (pdf)

    $28.99$25.50

  • Sale -43% GROCO 1-1/2" 90 Degree Hose Thru-Hull Fitting [HTHC-1500-S]

    GROCO 1-1/2" 90 Degree Hose Thru-Hull Fitting [HTHC-1500-S]

    1-1/2" 90 Degree Hose Thru-Hull Fitting Features: 90 Degree Barb #316 Stainless Steel Thru Hull with Bronze Hose Connection UL Listed 647B Specifications: Hose Size: 1-1/2" Material: Stainless Steel Box Dimensions: 5"H x 6"W x 6"L WT: 2.2 lbs UPC: 742985139312

    $186.00$105.50

  • Sale -34% GROCO 1" 90 Degree Hose Thru-Hull Fitting [HTHC-1000-S]

    GROCO 1" 90 Degree Hose Thru-Hull Fitting [HTHC-1000-S]

    1" 90 Degree Hose Thru-Hull Fitting Features: 90 Degree Barb #316 Stainless Steel Thru Hull with Bronze Hose Connection UL Listed 647B Specifications: Hose Size: 1" Material: Stainless Steel Box Dimensions: 5"H x 5"W x 5"L WT: 1.2 lbs UPC: 742985139299

    $67.00$44.50

  • Sale -32% GROCO 3/4" 90 Degree Hose Thru-Hull Fitting [HTHC-750-S]

    GROCO 3/4" 90 Degree Hose Thru-Hull Fitting [HTHC-750-S]

    3/4" 90 Degree Hose Thru-Hull Fitting Features: 90 Degree Barb #316 Stainless Steel Thru Hull with Bronze Hose Connection UL Listed 647B Specifications: Material: Stainless Steel Hose Size: 3/4" Box Dimensions: 3"H x 3"W x 5"L WT: 0.75 lbs UPC: 742985139282

    $54.00$36.50

  • Sale -36% GROCO 1-1/2" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-1500-W]

    GROCO 1-1/2" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-1500-W]

    1-1/2" Bronze High Speed Thru-Hull Fitting w/Nut Features: Designed for increased flow compared to standard Thru Hulls and with less drag NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 1-1/2" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 1.3 lbs UPC: 742985143258

    $83.00$53.50

  • Sale -35% GROCO 1-1/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1250-WS]

    GROCO 1-1/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1250-WS]

    1-1/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread #316 Stainless Steel Specifications: Hose Size: 1-1/4" Material: Stainless Steel Box Dimensions: 5"H x 6"W x 7"L WT: 1.8 lbs UPC: 742985174894

    $76.00$49.50

  • Sale -27% GROCO 3/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-750-W]

    GROCO 3/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-750-W]

    3/4" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 3/4" Material: Bronze Box Dimensions: 3"H x 3"W x 7"L WT: 0.8 lbs UPC: 742985141742

    $39.00$28.50

  • Sale -35% GROCO 2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-2000-WS]

    GROCO 2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-2000-WS]

    2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread #316 Stainless Steel Specifications: Hose Size: 2" Material: Stainless Steel Box Dimensions: 5"H x 6"W x 7"L WT: 2.6 lbs UPC: 742985175198

    $84.00$54.50

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