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Welcome to First Stop Marine, Your one stop shop for all of your boating needs and more!

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Collection: Marine Plumbing & Ventilation - Thru-Hull Fittings

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Brand_Attwood Marine (12 products)
Brand_Forespar Performance Products (3 products)
Brand_GROCO (59 products)
Brand_Perko (29 products)
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Marine Plumbing & Ventilation (104 products)
Marine Plumbing & Ventilation | Accessories (1 products)
Marine Plumbing & Ventilation | Thru-Hull Fittings (104 products)
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104 products

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]

Sale

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 3/4" Inner Diameter [66547-3]

Vendor:
Attwood Marine

Regular price $27.99 USD

Regular price ~~$30.39 USD~~ Sale price $27.99 USD
Unit price per

Sale
Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]

Sale

Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1" Inner Diameter [66542-3]

Vendor:
Attwood Marine

Regular price $31.99 USD

Regular price ~~$35.16 USD~~ Sale price $31.99 USD
Unit price per

Sale
Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]

Sale

Perko 1" Thru-Hull Fitting f/Hose Bronze MADE IN THE USA [0350006DPP]

Vendor:
Perko

Regular price $54.99 USD

Regular price ~~$88.08 USD~~ Sale price $54.99 USD
Unit price per

Sale
Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]

Sale

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]

Vendor:
Attwood Marine

Regular price $31.99 USD

Regular price ~~$35.42 USD~~ Sale price $31.99 USD
Unit price per

Sale
Perko 8" x 5-1/8" Scoop Strainer Bronze MADE IN THE USA [0066DP4PLB]

Sale

Perko 8" x 5-1/8" Scoop Strainer Bronze MADE IN THE USA [0066DP4PLB]

Vendor:
Perko

Regular price $74.99 USD

Regular price ~~$114.05 USD~~ Sale price $74.99 USD
Unit price per

Sale
GROCO 1-1/2" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-1500-W]

Sale

GROCO 1-1/2" Bronze High Speed Thru-Hull Fitting w/Nut [HSTH-1500-W]

Vendor:
GROCO

Regular price $71.99 USD

Regular price ~~$95.00 USD~~ Sale price $71.99 USD
Unit price per

Sale
GROCO 3/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-750-W]

Sale

GROCO 3/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-750-W]

Vendor:
GROCO

Regular price $32.99 USD

Regular price ~~$43.00 USD~~ Sale price $32.99 USD
Unit price per

Sale
GROCO 1/2" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-500-W]

Sale

GROCO 1/2" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-500-W]

Vendor:
GROCO

Regular price $15.99 USD

Regular price ~~$21.00 USD~~ Sale price $15.99 USD
Unit price per

Sale
GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/2" [HTH-1500]

Sale

GROCO Bronze Hose Barb Thru-Hull Fitting - 1-1/2" [HTH-1500]

Vendor:
GROCO

Regular price $57.99 USD

Regular price ~~$77.00 USD~~ Sale price $57.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $43.99 USD

Regular price ~~$60.09 USD~~ Sale price $43.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $44.99 USD

Regular price ~~$59.00 USD~~ Sale price $44.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $25.99 USD

Regular price ~~$34.00 USD~~ Sale price $25.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $29.99 USD

Regular price ~~$62.46 USD~~ Sale price $29.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $47.99 USD

Regular price ~~$87.56 USD~~ Sale price $47.99 USD
Unit price per

Sale
Perko 1-1/2" Thru-Hull Fitting f/ Hose Bronze Made in the USA [0350008DPP]

Sale

Perko 1-1/2" Thru-Hull Fitting f/ Hose Bronze Made in the USA [0350008DPP]

Vendor:
Perko

Regular price $83.99 USD

Regular price ~~$164.41 USD~~ Sale price $83.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $21.99 USD

Regular price ~~$28.00 USD~~ Sale price $21.99 USD
Unit price per

Sale
Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter [66551-3]

Sale

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter [66551-3]

Vendor:
Attwood Marine

Regular price $54.99 USD

Regular price ~~$61.56 USD~~ Sale price $54.99 USD
Unit price per

Sale
GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1" [HTH-1000-S]

Sale

GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1" [HTH-1000-S]

Vendor:
GROCO

Regular price $30.99 USD

Regular price ~~$41.00 USD~~ Sale price $30.99 USD
Unit price per

Sale
GROCO Bronze Hose Barb Thru-Hull Fitting - 2" [HTH-2000]

Sale

GROCO Bronze Hose Barb Thru-Hull Fitting - 2" [HTH-2000]

Vendor:
GROCO

Regular price $75.99 USD

Regular price ~~$101.00 USD~~ Sale price $75.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $201.99 USD

Regular price ~~$268.00 USD~~ Sale price $201.99 USD
Unit price per

Sale
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]

Vendor:
Attwood Marine

Regular price $9.99 USD

Regular price ~~$0.00 USD~~ Sale price $9.99 USD
Unit price per
GROCO 1" 90 Degree Hose Thru-Hull Fitting [HTHC-1000-S]

Sale

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

Vendor:
GROCO

Regular price $51.99 USD

Regular price ~~$69.00 USD~~ Sale price $51.99 USD
Unit price per

Sale
GROCO 1-1/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1250-WS]

Sale

GROCO 1-1/4" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1250-WS]

Vendor:
GROCO

Regular price $58.99 USD

Regular price ~~$78.00 USD~~ Sale price $58.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $29.99 USD

Regular price ~~$40.00 USD~~ Sale price $29.99 USD
Unit price per

Sale

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