Skip to content
ALL MERCURY AND YAMAHA POWERHEADS AND LOWER UNITS NOW CARRY 24 MONTH WARRANTIES AT NO ADDITIONAL COST!
ALL MERCURY AND YAMAHA POWERHEADS AND LOWER UNITS NOW CARRY 24 MONTH WARRANTIES AT NO ADDITIONAL COST!

Marine Plumbing & Ventilation - Thru-Hull Fittings

  • Save 27% Save %

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

    GROCO
    $56.00
    $56.00 - $56.00
    $56.00
    $40.99
    $40.99 - $40.99
    $40.99
    Low stock

    3/4" 90 Degree Hose Thru-Hull Fitting Features: 90 Degree Barb #316 Stainless Steel Thru Hull with Bronze Hose Connection UL Listed 647B Specific...

    View full details
    $56.00
    $56.00 - $56.00
    $56.00
    $40.99
    $40.99 - $40.99
    $40.99
    Save 27% Save %
  • Save 27% Save %

    GROCO 3/4" Slotted Hi Speed Thru-Hull w/Nut [HSSLTH-750-W]

    GROCO
    $41.00
    $41.00 - $41.00
    $41.00
    $29.99
    $29.99 - $29.99
    $29.99
    In stock

    3/4" Slotted Hi Speed Thru-Hull with NutFeatures: 3/4" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size: 3/...

    View full details
    $41.00
    $41.00 - $41.00
    $41.00
    $29.99
    $29.99 - $29.99
    $29.99
    Save 27% Save %
  • Save 27% Save %

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

    GROCO
    $44.00
    $44.00 - $44.00
    $44.00
    $31.99
    $31.99 - $31.99
    $31.99
    Low 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...

    View full details
    $44.00
    $44.00 - $44.00
    $44.00
    $31.99
    $31.99 - $31.99
    $31.99
    Save 27% Save %
  • Save 33% Save %

    GROCO 2" Bronze Combo Scoop Thru-Hull w/Nut [STH-2000-W]

    GROCO
    $166.00
    $166.00 - $166.00
    $166.00
    $110.99
    $110.99 - $110.99
    $110.99
    Low stock

    2" Bronze Combo Scoop Thru-Hull w/Nut Features: Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C83600 B...

    View full details
    $166.00
    $166.00 - $166.00
    $166.00
    $110.99
    $110.99 - $110.99
    $110.99
    Save 33% Save %
  • Save 33% Save %

    GROCO 3" Bronze Thru-Hull Fitting w/Nut [TH-3000-W]

    GROCO
    $332.00
    $332.00 - $332.00
    $332.00
    $221.99
    $221.99 - $221.99
    $221.99
    Low stock

    3" Bronze Thru-Hull Fitting with NutHigher flow rates are possible with this 3" GROCO thru-hull fitting than conventional thru-hulls.Features: NPS...

    View full details
    $332.00
    $332.00 - $332.00
    $332.00
    $221.99
    $221.99 - $221.99
    $221.99
    Save 33% Save %
  • Save 33% Save %

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

    GROCO
    $107.00
    $107.00 - $107.00
    $107.00
    $71.99
    $71.99 - $71.99
    $71.99
    Low stock

    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 c...

    View full details
    $107.00
    $107.00 - $107.00
    $107.00
    $71.99
    $71.99 - $71.99
    $71.99
    Save 33% Save %
  • Save 27% Save %

    GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 5/8" [HTH-625-S]

    GROCO
    $34.00
    $34.00 - $34.00
    $34.00
    $24.99
    $24.99 - $24.99
    $24.99
    In stock

    Stainless Steel Hose Barb Thru-Hull Fitting - 5/8" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: ...

    View full details
    $34.00
    $34.00 - $34.00
    $34.00
    $24.99
    $24.99 - $24.99
    $24.99
    Save 27% Save %
  • Save 26% Save %

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

    GROCO
    $43.00
    $43.00 - $43.00
    $43.00
    $31.99
    $31.99 - $31.99
    $31.99
    In stock

    Stainless Steel Hose Barb Thru-Hull Fitting - 1-1/8" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications...

    View full details
    $43.00
    $43.00 - $43.00
    $43.00
    $31.99
    $31.99 - $31.99
    $31.99
    Save 26% Save %
  • Save 26% Save %

    GROCO 1" Slotted Hi Speed Thru-Hull w/Nut [HSSLTH-1000-W]

    GROCO
    $61.00
    $61.00 - $61.00
    $61.00
    $44.99
    $44.99 - $44.99
    $44.99
    In stock

    1" Slotted Hi Speed Thru-Hull with NutFeatures: 1" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size: 1" Mat...

    View full details
    $61.00
    $61.00 - $61.00
    $61.00
    $44.99
    $44.99 - $44.99
    $44.99
    Save 26% Save %
  • Save 26% Save %

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

    GROCO
    $23.00
    $23.00 - $23.00
    $23.00
    $16.99
    $16.99 - $16.99
    $16.99
    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 Ava...

    View full details
    $23.00
    $23.00 - $23.00
    $23.00
    $16.99
    $16.99 - $16.99
    $16.99
    Save 26% Save %
  • Save 27% Save %

    GROCO 1-1/4" Bronze Combo Scoop Thru-Hull w/Nut [STH-1250-W]

    GROCO
    $86.00
    $86.00 - $86.00
    $86.00
    $62.99
    $62.99 - $62.99
    $62.99
    In stock

    1-1/4" Bronze Combo Scoop Thru-Hull w/Nut Features: Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C836...

    View full details
    $86.00
    $86.00 - $86.00
    $86.00
    $62.99
    $62.99 - $62.99
    $62.99
    Save 27% Save %
  • Save 26% Save %

    GROCO 3/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-750-W]

    GROCO
    $23.00
    $23.00 - $23.00
    $23.00
    $16.99
    $16.99 - $16.99
    $16.99
    Low stock

    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...

    View full details
    $23.00
    $23.00 - $23.00
    $23.00
    $16.99
    $16.99 - $16.99
    $16.99
    Save 26% Save %
  • Save 47% Save %

    Perko 1-1/8" Thru-Hull Fitting f/ Hose Chrome Plated Bronze Made in the USA [035006ADPC]

    Perko
    $113.32
    $113.32 - $113.32
    $113.32
    $59.99
    $59.99 - $59.99
    $59.99
    Low stock

    Perko 1-1/8" Thru-Hull Connection f/ use with Hose Chrome Plated BronzeFlange is machined to fit and grooved to retain bedding compound neck isthr...

    View full details
    $113.32
    $113.32 - $113.32
    $113.32
    $59.99
    $59.99 - $59.99
    $59.99
    Save 47% Save %
  • Save 60% Save %

    Perko 5/8" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP4A]

    Perko
    $17.57
    $17.57 - $17.57
    $17.57
    $6.99
    $6.99 - $6.99
    $6.99
    In stock

    Perko 5/8" Thru-Hull Fitting f/ Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 5/8 Mounting Hole Diamete...

    View full details
    $17.57
    $17.57 - $17.57
    $17.57
    $6.99
    $6.99 - $6.99
    $6.99
    Save 60% Save %
  • Save 69% Save %

    Perko 1" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP6]

    Perko
    $16.19
    $16.19 - $16.19
    $16.19
    $4.99
    $4.99 - $4.99
    $4.99
    Low stock

    Perko 1" Thru-Hull Fitting f/ Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 1 Mounting Hole Diameter In...

    View full details
    $16.19
    $16.19 - $16.19
    $16.19
    $4.99
    $4.99 - $4.99
    $4.99
    Save 69% Save %
  • Save 37% Save %

    Perko 5" x 3-1/4" Scoop Strainer Bronze MADE IN THE USA [0066DP2PLB]

    Perko
    $62.16
    $62.16 - $62.16
    $62.16
    $38.99
    $38.99 - $38.99
    $38.99
    Low stock

    Perko 5" X 3-1/4" Scoop Strainer BronzeCast bronzeMachine slotsTechnical Information: For Thru-Hull Size Inches: 3/4 & 1 Dimensions Strainer ...

    View full details
    $62.16
    $62.16 - $62.16
    $62.16
    $38.99
    $38.99 - $38.99
    $38.99
    Save 37% Save %
  • Save 33% Save %

    GROCO 2-1/2" Bronze Thru-Hull Fitting w/Nut [TH-2500-W]

    GROCO
    $231.00
    $231.00 - $231.00
    $231.00
    $153.99
    $153.99 - $153.99
    $153.99
    In stock

    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.Featu...

    View full details
    $231.00
    $231.00 - $231.00
    $231.00
    $153.99
    $153.99 - $153.99
    $153.99
    Save 33% Save %
  • Save 27% Save %

    GROCO 1-1/4" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-1250-W]

    GROCO
    $66.00
    $66.00 - $66.00
    $66.00
    $47.99
    $47.99 - $47.99
    $47.99
    In stock

    1-1/4" Bronze High Speed Thru-Hull Fitting w/Nut Features: Designed for increased flow compared to standard Thru Hulls and with less drag NPSM / N...

    View full details
    $66.00
    $66.00 - $66.00
    $66.00
    $47.99
    $47.99 - $47.99
    $47.99
    Save 27% Save %
  • Save 33% Save %

    GROCO 1-1/4" Slotted Hi Speed Thru-Hull w/Nut [HSSLTH-1250-W]

    GROCO
    $104.00
    $104.00 - $104.00
    $104.00
    $69.99
    $69.99 - $69.99
    $69.99
    Low stock

    1-1/4" Slotted Hi Speed Thru-Hull with NutFeatures: 1-1/4" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size...

    View full details
    $104.00
    $104.00 - $104.00
    $104.00
    $69.99
    $69.99 - $69.99
    $69.99
    Save 33% Save %
  • Save 27% Save %

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

    GROCO
    $86.00
    $86.00 - $86.00
    $86.00
    $62.99
    $62.99 - $62.99
    $62.99
    In stock

    2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread #316 Stainless Steel Specifications: Hos...

    View full details
    $86.00
    $86.00 - $86.00
    $86.00
    $62.99
    $62.99 - $62.99
    $62.99
    Save 27% Save %
  • Save 27% Save %

    GROCO 1" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1000-W]

    GROCO
    $33.00
    $33.00 - $33.00
    $33.00
    $23.99
    $23.99 - $23.99
    $23.99
    In stock

    1" NPS NPT Combo Bronze Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread C83600 Bronze Sizes from 1/2" to 5" UL Listed 647B Avail...

    View full details
    $33.00
    $33.00 - $33.00
    $33.00
    $23.99
    $23.99 - $23.99
    $23.99
    Save 27% Save %
  • Save 13% Save %

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

    Attwood Marine
    $61.99
    $61.99 - $61.99
    $61.99
    $53.99
    $53.99 - $53.99
    $53.99
    Low stock

    Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter Polish your image with these beautiful, durable stainless steel fittings. ...

    View full details
    $61.99
    $61.99 - $61.99
    $61.99
    $53.99
    $53.99 - $53.99
    $53.99
    Save 13% Save %
  • Save 21% Save %

    Attwood Stainless Steel Scupper Valve Barbed - 1-1/2" Hose Size [66553-3]

    Attwood Marine
    $102.83
    $102.83 - $102.83
    $102.83
    $80.99
    $80.99 - $80.99
    $80.99
    Low stock

    Stainless Steel Scupper Valve Barbed - 1-1/2" Hose SizePolish your image with these beautiful, durable stainless steel fittings. Why specify plast...

    View full details
    $102.83
    $102.83 - $102.83
    $102.83
    $80.99
    $80.99 - $80.99
    $80.99
    Save 21% Save %
  • Save 33% Save %

    GROCO 1-1/2" Slotted Hi Speed Thru-Hull w/Nut [HSSLTH-1500-W]

    GROCO
    $131.00
    $131.00 - $131.00
    $131.00
    $87.99
    $87.99 - $87.99
    $87.99
    Low stock

    1-1/2" Slotted Hi Speed Thru-Hull with NutFeatures: 1-1/2" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size...

    View full details
    $131.00
    $131.00 - $131.00
    $131.00
    $87.99
    $87.99 - $87.99
    $87.99
    Save 33% Save %

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare