Marine Plumbing & Ventilation - Thru-Hull Fittings

97 products


  • Sale -43% Perko 1-1/2" Thru-Hull Fitting f/Hose Plastic MADE IN THE  USA [0328DP8]

    Perko 1-1/2" Thru-Hull Fitting f/Hose Plastic MADE IN THE USA [0328DP8]

    Perko 1-1/2" Thru-Hull Fitting for Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 1-1/2 Mounting Hole Diameter Inches: 1-7/8 Maximum Hull Thickness Inches: 1-7/8 O.D. Flange Inches: 3 MADE IN THE USA Specifications: Hose Size: 1-1/2" Material: Plastic Box Dimensions: 2"H x 2"W x 6"L WT: 0.3 lbs UPC: 085226768705

    $21.76$12.50

  • Sale -51% Perko 3/4" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP5PLB]

    Perko 3/4" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP5PLB]

    Perko 3/4" 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: 3/4 Mouting Hole Diameter Inches: 1 Maximum Hull Thickness Inches: 1-1/2 O.D. Flange Inches: 1-7/8 Model Number: 0322DP5PLB Ship Weight: 2.4/11.6 lbs. MADE IN THE USA Specifications: Hose Size: 3/4" Material: Bronze Box Dimensions: 2"H x 2"W x 4"L WT: 0.25 lbs UPC: 085226035951

    $66.76$32.50

  • Sale -34% Perko Thru-Hull Scupper f/Mounting Through Transom [0323DP]

    Perko Thru-Hull Scupper f/Mounting Through Transom [0323DP]

    Thru-Hull Scupper for Mounting Through TransomFeatures: Molded White Polymer Soft Black Flapper Nut and Mounting Hardware Included Specifications: Hose Size: 1-1/2" Mounting Hole Diameter: 1-7/8" Max. Hole Thickness: 2-1/8" O.D. Flange: 2-7/8" Specifications: Hose Size: 1-1/2" Material: Plastic Box Dimensions: 4"H x 6"W x 10"L WT: 0.45 lbs UPC: 085226028502

    $60.09$39.50

  • Sale -33% GROCO 3/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-750-WS]

    GROCO 3/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-750-WS]

    3/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread #316 Stainless Steel Specifications: Hose Size: 3/4" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 8"L WT: 0.75 lbs UPC: 742985175167

    $59.00$39.50

  • Sale -30% GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/8" [HTH-1125-S]

    GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/8" [HTH-1125-S]

    Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/8" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: Hose Size: 1-1/8" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 5"L WT: 0.7 lbs UPC: 742985138995

    $42.00$29.50

  • Sale -32% GROCO 1" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1000-W]

    GROCO 1" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1000-W]

    1" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 1" Material: Bronze Box Dimensions: 3"H x 3"W x 6"L WT: 1 lbs UPC: 742985141759

    $52.00$35.50

  • Attwood White Plastic Thru-Hull Fitting - 1-1/8" Inner Diameter [3874-3]

    Attwood White Plastic Thru-Hull Fitting - 1-1/8" Inner Diameter [3874-3]

    White Plastic Thru-Hull Fitting - 1-1/8" Inner DiameterThis thru-hull fitting is made with a durable, thermoplastic construction, which prevents electrolysis.Specifications: Hose Size: (inch) 1-1/8" Inner diameter Stem Length: (inch) 3-1/4" Max Hull Thickness: (inch) 1-1/4" Flange Diameter: (inch) 2-1/4" Installation Hole Size: (inch) 1-3/8" Drain Plug: (inch) 7/8" Construction: Polypropylene Color: White  *Plastic thru-hull connectors are designed for installation above the water line only Specifications: Hose Size: 1-1/8" Material: Plastic Box Dimensions: 3"H x 4"W x 7"L WT: 0.25 lbs UPC: 022697387431 Quick Guide (pdf)

    $13.50

  • Sale -18% Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" Inner Diameter [66549-3]

    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" Inner Diameter [66549-3]

    Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" 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) 1-1/8" inner diameter Flange Diameter: (inch) 2-1/4" Thread O.D. (outside diameter): (inch) 1-3/8"  Thread Length: (inch) 2-3/8" Barb Length: (inch) 1-1/4" Total Length: (inch) 3-7/8" Install Hole Saw Size: (inch) 1-1/4"  Thread NPSM: (inch) 1" Max Hull Thickness: (inch) 1-3/4" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 1-1/8" Material: Stainless Steel Box Dimensions: 2"H x 4"W x 7"L WT: 0.85 lbs UPC: 022697665492 Quick Guide (pdf)

    $42.28$34.50

  • Sale -25% GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 3/4" [HTH-750-S]

    GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 3/4" [HTH-750-S]

    Stainless Steel Hose Barb Thru-Hull Fitting - 3/4" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: Hose Size: 3/4" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 4"L WT: 0.5 lbs UPC: 742985138988

    $34.00$25.50

  • Sale -32% GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/8" [HTH-1125]

    GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/8" [HTH-1125]

    Bronze Hose Barb Thru-Hull Fitting - 1-1/8" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 1-1/8" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 0.7 lbs UPC: 742985103979

    $49.00$33.50

  • Sale -39% GROCO 2" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-2000-W]

    GROCO 2" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-2000-W]

    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: 2" Material: Bronze Box Dimensions: 4"H x 4"W x 5"L WT: 1.7 lbs UPC: 742985142909

    $102.00$62.50

  • Sale -35% Perko 5/8" Thru-Hull Fitting f/ Hose Bronze MADE IN THE USA [0350004DPP]

    Perko 5/8" Thru-Hull Fitting f/ Hose Bronze MADE IN THE USA [0350004DPP]

    Perko 5/8" Thru-Hull Connection f/ use with Hose BronzeFlange is machined to fit and grooved to retain bedding compound neck isthreaded to approximately 3/16 inch from flange. Cast bronze, plain or chromed brass Regular or short length versions Regular Length- Fits maximum hull thickness up to 2 inchesShort Length- For thin hull sections up to 5/8 inches maximumTechnical Information Regular Length - Plain Bronze: Hose Size Inches: 5/8 Mounting Hole Diameter Inches: 13/16 Maximum Hull Thickness Inches: 1-1/16 O.D. Flange Inches: 1-1/2 Model Number: 0350004DPP Ship Weight: 1.9/3.0 lbs. Made in the USA Specifications: Hose Size: 5/8" Material: Bronze Box Dimensions: 1"H x 1"W x 4"L WT: 0.15 lbs UPC: 085226036064

    $62.46$40.50

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