Marine Plumbing & Ventilation - Thru-Hull Fittings

106 products


  • Sale -34% GROCO 1-1/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-1250-WS]

    GROCO 1-1/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-1250-WS]

    7 in stock

    1-1/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread #316 Stainless Steel Sizes from 1/2" to 3" UL Listed 647B BSPP and Stainless Steel models available Specifications: Hose Size: 1-1/4" Material: Stainless Steel Box Dimensions: 5"H x 5"W x 5"L WT: 1.25 lbs UPC: 742985146488

    7 in stock

    $67.00$44.50

  • Sale -50% Perko 1" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP6PLB]

    Perko 1" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP6PLB]

    10 in stock

    Perko 1" Thru-Hull Fitting w/ Pipe Thread BronzeFlange is machined to fit hull and grooved to retain bedding compound. Neckis threaded to approximately 3/8 inch from flange.Cast bronze.Technical Information: Pipe Size Inches: 1 Mouting Hole Diameter Inches: 1-5/16 Maximum Hull Thickness Inches: 1-7/8 O.D. Flange Inches: 2-3/16 Model Number: 0322DP6PLB Ship Weight: 4.1/18.0 lbs. MADE IN THE USA Specifications: Hose Size: 1" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 0.75 lbs UPC: 085226035968

    10 in stock

    $87.56$43.50

  • 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]

    9 in stock

    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)

    9 in stock

    $13.50

  • Sale -23%Last stock! 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]

    4 in stock

    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)

    4 in stock

    $61.56$47.50

  • Sale -33%Last stock! GROCO 1" 90 Degree Hose Thru-Hull Fitting [HTHC-1000-S]

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

    5 in stock

    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

    5 in stock

    $68.00$45.50

  • Sale -34%Last stock! 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]

    4 in stock

    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

    4 in stock

    $78.00$51.50

  • Sale -44%Last stock! GROCO 2-1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-2500-W]

    GROCO 2-1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-2500-W]

    4 in stock

    2-1/2" Bronze Combo Scoop Thru-Hull w/Nut Features: Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C83600 Bronze Specifications:Thread NPS: 2-1/2" Specifications: Hose Size: 2-1/2" Material: Bronze Box Dimensions: 4"H x 4"W x 6"L WT: 1.5 lbs UPC: 742985172227

    4 in stock

    $252.00$141.50

  • Sale -35% GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/2" [HTH-1500-S]

    GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/2" [HTH-1500-S]

    9 in stock

    Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/2" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: Hose Size: 1-1/2" Material: Stainless Steel Box Dimensions: 5"H x 5"W x 5"L WT: 1.25 lbs UPC: 742985139015

    9 in stock

    $84.00$54.50

  • Sale -24% GROCO Bronze Hose Barb Thru-Hull Fitting - 5/8" [HTH-625]

    GROCO Bronze Hose Barb Thru-Hull Fitting - 5/8" [HTH-625]

    16 in stock

    Bronze Hose Barb Thru-Hull Fitting - 5/8" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 5/8" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 0.5 lbs UPC: 742985062269

    16 in stock

    $27.00$20.50

  • Sale -34% GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/4" [HTH-1250-S]

    GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/4" [HTH-1250-S]

    16 in stock

    Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/4" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: Hose Size: 1-1/4" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 5"L WT: 1 lbs UPC: 742985139008

    16 in stock

    $69.00$45.50

  • Sale -31% GROCO Bronze Hose Barb Thru-Hull Fitting - 1" [HTH-1000]

    GROCO Bronze Hose Barb Thru-Hull Fitting - 1" [HTH-1000]

    13 in stock

    Bronze Hose Barb Thru-Hull Fitting - 1" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 1" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 0.7 lbs UPC: 742985005228

    13 in stock

    $44.00$30.50

  • Sale -27% GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1/2" [HTH-500-S]

    GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1/2" [HTH-500-S]

    17 in stock

    Stainless Steel Hose Barb Thru-Hull Fitting - 1/2" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: Hose Size: 1/2" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 4"L WT: 0.45 lbs UPC: 742985142121

    17 in stock

    $39.00$28.50

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