Skip to content

Home
Product Categories
FSM SWAG!
Contact
- Contact Us!
- Do not sell or share my personal information
About us!

Facebook
Instagram
TikTok

Search

Home
Product Categories
FSM SWAG!
Contact
- Contact Us!
- Do not sell or share my personal information
About us!

Search

Item added to your cart

View cart

FREE SHIPPING ON ORDERS OVER 100.00$ USE CODE: FREESHIP100

Welcome to our store

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

Family Owned and Operated

Collection: Marine Plumbing & Ventilation - Thru-Hull Fittings

Filter and sort Filter

Filter and sort

Filter

97 products

Availability

In stock (97 products)
Out of stock (0 products)

Clear

Price

The highest price is $234.99

$

From

$

To

Clear

Brand

Attwood Marine (10 products)
GROCO (56 products)
Perko (31 products)

Clear

Product type

Thru-Hull Fittings (97 products)

Clear

More filters

1st Class Eligible (29 products)
Brand_Attwood Marine (10 products)
Brand_GROCO (56 products)
Brand_Perko (31 products)
Clearance (2 products)
Marine Plumbing & Ventilation (97 products)
Marine Plumbing & Ventilation | Thru-Hull Fittings (97 products)
Specials (2 products)

Clear

Sort by:

Remove all

Sort by:

97 products

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

Sale

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

Vendor:
GROCO

Regular price $17.99 USD

Regular price ~~$23.00 USD~~ Sale price $17.99 USD
Unit price per

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

Sale

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

Vendor:
Attwood Marine

Regular price $80.99 USD

Regular price ~~$99.99 USD~~ Sale price $80.99 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 $27.99 USD

Regular price ~~$34.99 USD~~ Sale price $27.99 USD
Unit price per

Sale
GROCO 1-1/4" 90 Degree Hose Thru-Hull Fitting [HTHC-1250-S]

Sale

GROCO 1-1/4" 90 Degree Hose Thru-Hull Fitting [HTHC-1250-S]

Vendor:
GROCO

Regular price $79.99 USD

Regular price ~~$106.00 USD~~ Sale price $79.99 USD
Unit price per

Sale
GROCO 1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-500-WS]

Sale

GROCO 1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-500-WS]

Vendor:
GROCO

Regular price $16.99 USD

Regular price ~~$22.00 USD~~ Sale price $16.99 USD
Unit price per

Sale
GROCO 1-1/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1250-W]

Sale

GROCO 1-1/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1250-W]

Vendor:
GROCO

Regular price $62.99 USD

Regular price ~~$84.00 USD~~ Sale price $62.99 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 $54.99 USD

Regular price ~~$73.00 USD~~ Sale price $54.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $15.99 USD

Regular price ~~$21.76 USD~~ Sale price $15.99 USD
Unit price per

Sale
GROCO 1" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1000-WS]

Sale

GROCO 1" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1000-WS]

Vendor:
GROCO

Regular price $47.99 USD

Regular price ~~$63.00 USD~~ Sale price $47.99 USD
Unit price per

Sale
GROCO 1-1/2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1500-W]

Sale

GROCO 1-1/2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1500-W]

Vendor:
GROCO

Regular price $67.99 USD

Regular price ~~$90.00 USD~~ Sale price $67.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $46.99 USD

Regular price ~~$66.76 USD~~ Sale price $46.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $163.99 USD

Regular price ~~$218.00 USD~~ Sale price $163.99 USD
Unit price per

Sale
Perko 1/2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP4PLB]

Sale

Perko 1/2" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP4PLB]

Vendor:
Perko

Regular price $36.99 USD

Regular price ~~$51.96 USD~~ Sale price $36.99 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 $42.99 USD

Regular price ~~$60.09 USD~~ Sale price $42.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $234.99 USD

Regular price ~~$313.00 USD~~ Sale price $234.99 USD
Unit price per

Sale
GROCO 1-1/2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1500-WS]

Sale

GROCO 1-1/2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1500-WS]

Vendor:
GROCO

Regular price $58.99 USD

Regular price ~~$78.00 USD~~ Sale price $58.99 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 $43.99 USD

Regular price ~~$58.00 USD~~ Sale price $43.99 USD
Unit price per

Sale
Perko 3/4" Thru-Hull Fitting f/ Hose Bronze MADE IN THE USA [0350005DPP]

Sale

Perko 3/4" Thru-Hull Fitting f/ Hose Bronze MADE IN THE USA [0350005DPP]

Vendor:
Perko

Regular price $47.99 USD

Regular price ~~$67.77 USD~~ Sale price $47.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $16.99 USD

Regular price ~~$22.00 USD~~ Sale price $16.99 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 1" NPS NPT Combo Bronze Thru-Hull Fitting w/Nut [TH-1000-W]

Sale

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

Vendor:
GROCO

Regular price $24.99 USD

Regular price ~~$33.00 USD~~ Sale price $24.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $32.99 USD

Regular price ~~$44.00 USD~~ Sale price $32.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $31.99 USD

Regular price ~~$42.00 USD~~ Sale price $31.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $64.99 USD

Regular price ~~$86.00 USD~~ Sale price $64.99 USD
Unit price per

Sale

1
2
3
…
5

Facebook
Instagram
TikTok

Subscribe to our emails

Email

Facebook
Instagram
TikTok

Payment methods

© 2025, First Stop Marine Powered by Shopify

Refund policy
Privacy policy
Terms of service
Contact information

Choosing a selection results in a full page refresh.
Opens in a new window.