Marine Plumbing & Ventilation - Thru-Hull Fittings

106 products


  • Sale -31% GROCO 3/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-750-W]

    GROCO 3/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-750-W]

    18 in stock

    3/4" 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: 3/4" Specifications: Hose Size: 3/4" Material: Bronze Box Dimensions: 5"H x 5"W x 5"L WT: 1.15 lbs UPC: 742985063891

    18 in stock

    $44.00$30.50

  • Sale -33% GROCO 1" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-1000-WS]

    GROCO 1" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-1000-WS]

    9 in stock

    1" 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" Material: Stainless Steel Box Dimensions: 3"H x 3"W x 5"L WT: 0.7 lbs UPC: 742985146471

    9 in stock

    $60.00$40.50

  • Sale -20% GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-750-W]

    GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-750-W]

    19 in stock

    3/4" NPS NPT Combo Bronze Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread C83600 Bronze Sizes from 1/2" to 5" UL Listed 647B Available with (-W) or without nut (-L) BSPP and Stainless Steel models available Specifications: Hose Size: 3/4" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 0.5 lbs UPC: 742985064102

    19 in stock

    $23.00$18.50

  • Sale -32% GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/4" [HTH-1250]

    GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/4" [HTH-1250]

    10 in stock

    Bronze Hose Barb Thru-Hull Fitting - 1-1/4" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 1-1/4" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 1.05 lbs UPC: 742985005235

    10 in stock

    $58.00$39.50

  • Sale -44%Last stock! 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]

    3 in stock

    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

    3 in stock

    $191.00$107.50

  • Sale -35% GROCO 1-1/2" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1500-W]

    GROCO 1-1/2" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1500-W]

    9 in stock

    1-1/2" NPS NPT Combo Bronze Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread C83600 Bronze Sizes from 1/2" to 5" UL Listed 647B Available with (-W) or without nut (-L) BSPP and Stainless Steel models available Specifications: Hose Size: 1-1/2" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 1.35 lbs UPC: 742985064133

    9 in stock

    $71.00$46.50

  • Sale -12%Last stock! Forespar Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1/2"-3/4" [930001SS]

    Forespar Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1/2"-3/4" [930001SS]

    4 in stock

    Pro Series Valve Stainless Steel Capped Thru-Hull Fits 1/2"-3/4"Thru-hull only for small Pro Series valves; mushroom head, buttress thread Specifications: Hose Size: 3/4" Material: Plastic Box Dimensions: 2"H x 2"W x 3"L WT: 0.02 lbs Brochure (pdf)

    4 in stock

    $19.99$17.50

  • Sale -41% Perko 1-1/8" Thru-Hull Fitting f/ Hose Plastic MADE IN THE  USA [0328DP6A]

    Perko 1-1/8" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP6A]

    13 in stock

    Perko 1-⅛" Thru-Hull Fitting f/ Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 1-1/8 Mounting Hole Diameter Inches: 1-1/2 Maximum Hull Thickness Inches: 1-1/2 O.D. Flange Inches: 2-1/4 Model Number: 0328DP6A Ship Weight: 2.0/7.0 lbs. MADE IN THE USA Specifications: Hose Size: 1-1/8" Material: Plastic Box Dimensions: 2"H x 2"W x 4"L WT: 0.1 lbs UPC: 085226034152

    13 in stock

    $16.19$9.50

  • Sale -32% GROCO 1-1/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1250-W]

    GROCO 1-1/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1250-W]

    12 in stock

    1-1/4" NPS NPT Combo Bronze Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread C83600 Bronze Sizes from 1/2" to 5" UL Listed 647B Available with (-W) or without nut (-L) BSPP and Stainless Steel models available Specifications: Hose Size: 1-1/4" Material: Bronze Box Dimensions: 3"H x 3"W x 4"L WT: 1.15 lbs UPC: 742985064126

    12 in stock

    $55.00$37.50

  • Perko 3/4" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP5]

    Perko 3/4" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP5]

    16 in stock

    Perko 3/4" Thru-Hull Fitting f/ Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 3/4 Mounting Hole Diameter Inches: 1 Maximum Hull Thickness Inches: 1-7/16 O.D. Flange Inches: 1-7/8 Model Number: 0328DP5 Ship Weight: 1.3/9.1 lbs. MADE IN THE USA Specifications: Hose Size: 3/4" Material: Plastic Box Dimensions: 1"H x 2"W x 6"L WT: 0.1 lbs UPC: 085226034138

    16 in stock

    $8.50

  • Sale -8% 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]

    12 in stock

    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)

    12 in stock

    $29.74$27.50

  • Sale -40% Perko 3-1/2" x 2-1/2" Scoop Strainer Bronze MADE IN THE USA [0066DP1PLB]

    Perko 3-1/2" x 2-1/2" Scoop Strainer Bronze MADE IN THE USA [0066DP1PLB]

    7 in stock

    Perko 3-1/2" X 2-1/2" Scoop Strainer BronzeCast bronzeMachine slotsTechnical Information: For Thru-Hull Size Inches: 3/8 & 1/2 Dimensions Strainer Inches: 3-1/2 x 2-1/2 Model Number: 0066DP1PLB Ship Weight: 2.0/1.8 lbs. Screw Size: #8 Specifications: Material: Bronze Box Dimensions: 1"H x 3"W x 4"L WT: 0.3 lbs UPC: 085226337369

    7 in stock

    $35.86$21.50

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