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Marine Plumbing & Ventilation - Thru-Hull Fittings

Rugged thru-hull fittings for secure water intake and discharge connections.

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  • GROCO Bronze Hose Barb Thru-Hull Fitting - 1/2" [HTH-500]
    GROCO
    GROCO Bronze Hose Barb Thru-Hull Fitting - 1/2" [HTH-500]
    Bronze Hose Barb Thru-Hull Fitting - 1/2" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 1/2" Material: Bronze Box Dimensions: 3"H x 3"W x 5"L WT: 0.45 lbs UPC: 742985004900
    $17.99
    $17.99
  • GROCO 1" Bronze Combo Scoop Thru-Hull w/Nut [STH-1000-W]
    GROCO
    GROCO 1" Bronze Combo Scoop Thru-Hull w/Nut [STH-1000-W]
    1" 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: 1" Specifications: Hose Size: 1" Material: Bronze Box Dimensions: 5"H x 5"W x 5"L WT: 1.2 lbs UPC: 742985063907
    $46.99
    $46.99
  • GROCO 2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-2000-W]
    GROCO
    GROCO 2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-2000-W]
    2" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 2" Material: Bronze Box Dimensions: 4"H x 4"W x 6"L WT: 2.6 lbs UPC: 742985141780
    $92.99
    $92.99
  • Attwood Plastic Thru-Hull Fitting - 1-1/2" - White [3875-3]
    Attwood Marine
    Attwood Plastic Thru-Hull Fitting - 1-1/2" - White [3875-3]
    Plastic Thru-Hull Fitting - 1-1/2" - WhiteThese thru-hulls are made with a durable, thermoplastic construction which prevents electrolysis.Caution: Thru-Hull connectors are designed for installation above the water line only.Specifications: Fits Hose Size: 1-1/2" I.D. Stem Length: 3-1/2" Max. Hull Thickness: 1-1/4" Flange Diameter: 3"...
    $10.99
    $0.00
    $10.99
  • GROCO 3/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-750-WS]
    GROCO
    GROCO 3/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-750-WS]
    3/4" 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: 3/4" Material: Stainless Steel Box Dimensions: 3"H x 3"W x...
    $17.99
    $17.99
  • Perko 2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322009PLB]
    Perko
    Perko 2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322009PLB]
    Perko 2" Thru-Hull Fitting w/ Pipe Thread BronzeFlange is machined to fit hull and grooved to retain bedding compound. Neck is threaded to approximately 3/8 inch from flange.Cast Bronze.Technical Information: Pipe Size Inches: 2 Mounting Hole Diameter Inches: 2-3/8 Maximum Hull Thickness Inches: 2-3/8...
    $103.99
    $103.99
  • Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]
    Perko
    Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]
    Perko 5" X 3-1/4" Scoop Strainer BronzeCast bronzeMachine slotsTechnical Information: For Thru-Hull Size Inches: 3/4 & 1 Dimensions Strainer Inches: 5 X 3-1/4 Model Number: 0066DP2PLB Ship Weight: 4.4/4.3 lbs. Screw Size: #8
    $39.99
    $39.99
  • GROCO 3/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-750-W]
    GROCO
    GROCO 3/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-750-W]
    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
    $34.99
    $34.99
  • Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]
    Attwood Marine
    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]
    Stainless Steel Thru-Hull Standard 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...
    $29.99
    $30.39
    $29.99
  • GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]
    GROCO
    GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]
    3/4" 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: 3/4" Material: Bronze Box Dimensions: 3"H x 3"W x 5"L WT: 0.45 lbs UPC: 742985141728...
    $18.99
    $18.99
  • GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-750-W]
    GROCO
    GROCO 3/4" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-750-W]
    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...
    $19.99
    $19.99
  • GROCO 2-1/2" Bronze Thru-Hull Fitting w/Nut [TH-2500-W]GROCO 2-1/2" Bronze Thru-Hull Fitting w/Nut [TH-2500-W]
    GROCO
    GROCO 2-1/2" Bronze Thru-Hull Fitting w/Nut [TH-2500-W]
    2-1/2" Bronze Thru-Hull Fitting with NutHigher flow rates are possible with this 2-1/2" GROCO thru-hull fitting than conventional thru-hulls.Features: NPSM / NPT combination thread C83600 Bronze UL listed 647B Includes nut  BSPP and stainless steel models are available Specifications:Thread NPS: 2-1/2" Specifications: Hose Size:...
    $157.99
    $157.99
  • Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]
    Attwood Marine
    Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]
    Stainless Steel Thru-Hull Short Straight Barbed - 1" 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...
    $31.99
    $35.16
    $31.99
  • GROCO 3" Bronze Thru-Hull Fitting w/Nut [TH-3000-W]GROCO 3" Bronze Thru-Hull Fitting w/Nut [TH-3000-W]
    GROCO
    GROCO 3" Bronze Thru-Hull Fitting w/Nut [TH-3000-W]
    3" Bronze Thru-Hull Fitting with NutHigher flow rates are possible with this 3" GROCO thru-hull fitting than conventional thru-hulls.Features: NPSM / NPT combination thread C83600 Bronze UL listed 647B Includes nut  BSPP and stainless steel models are available Specifications:Thread NPS: 3" Specifications: Hose Size:...
    $226.99
    $226.99
  • GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-500-W]
    GROCO
    GROCO 1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-500-W]
    1/2" Bronze Combo Scoop Thru-Hull w/NutFeatures: Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C83600 Bronze Specifications:Thread NPS: 1/2" Specifications: Hose Size: 1/2" Material: Bronze Box Dimensions: 3"H x 3"W x 5"L WT: 0.8 lbs UPC: 742985063884
    $29.99
    $29.99
  • Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]
    Perko
    Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]
    Perko 1" 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...
    $54.99
    $54.99
  • Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]
    Attwood Marine
    Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]
    Stainless Steel Thru-Hull Standard Straight Barbed - 1" 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...
    $30.99
    $35.42
    $30.99
  • Perko 8" x 5-1/8" Scoop Strainer Bronze MADE IN THE USA [0066DP4PLB]
    Perko
    Perko 8" x 5-1/8" Scoop Strainer Bronze MADE IN THE USA [0066DP4PLB]
    Perko 8" x 5-1/8" 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
    $71.99
    $71.99
  • GROCO 1-1/2" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1500-W]
    GROCO
    GROCO 1-1/2" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1500-W]
    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...
    $55.99
    $55.99
  • GROCO 2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-2000-WS]
    GROCO
    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
    $66.99
    $86.00
    $66.99

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