Skip to content

Home
Product Categories
FSM SWAG!
Contact
- Contact Us!
About us!

Facebook
Instagram
TikTok

Search

Home
Product Categories
FSM SWAG!
Contact
- Contact Us!
About us!

Search

Item added to your cart

View cart

GET 10% OFF WHEN YOU SIGN UP WITH YOUR EMAIL!!

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

104 products

Availability

In stock (104 products)
Out of stock (0 products)

Clear

Price

The highest price is $248.99

$

From

$

To

Clear

Brand

Attwood Marine (12 products)
Forespar Performance Products (3 products)
GROCO (59 products)
Perko (29 products)
T-H Marine Supplies (1 products)

Clear

Product type

Accessories (1 products)
Thru-Hull Fittings (103 products)

Clear

More filters

1st Class Eligible (35 products)
Brand_Attwood Marine (12 products)
Brand_Forespar Performance Products (3 products)
Brand_GROCO (59 products)
Brand_Perko (29 products)
Brand_T-H Marine Supplies (1 products)
Clearance (1 products)
Marine Plumbing & Ventilation (104 products)
Marine Plumbing & Ventilation | Accessories (1 products)
Marine Plumbing & Ventilation | Thru-Hull Fittings (104 products)
Specials (1 products)

Clear

Sort by:

Remove all

Sort by:

104 products

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

Sale

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

Vendor:
GROCO

Regular price $30.99 USD

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

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

Sale

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

Vendor:
GROCO

Regular price $41.99 USD

Regular price ~~$56.00 USD~~ Sale price $41.99 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 2" Bronze Combo Scoop Thru-Hull w/Nut [STH-2000-W]

Sale

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

Vendor:
GROCO

Regular price $124.99 USD

Regular price ~~$166.00 USD~~ Sale price $124.99 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 $248.99 USD

Regular price ~~$332.00 USD~~ Sale price $248.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $80.99 USD

Regular price ~~$107.00 USD~~ Sale price $80.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $25.99 USD

Regular price ~~$34.00 USD~~ Sale price $25.99 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 $32.99 USD

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

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

Sale

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

Vendor:
GROCO

Regular price $45.99 USD

Regular price ~~$61.00 USD~~ Sale price $45.99 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
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
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 $17.99 USD

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

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

Sale

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

Vendor:
Perko

Regular price $61.99 USD

Regular price ~~$113.32 USD~~ Sale price $61.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $6.99 USD

Regular price ~~$17.57 USD~~ Sale price $6.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $39.99 USD

Regular price ~~$62.16 USD~~ Sale price $39.99 USD
Unit price per

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

Sale

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

Vendor:
Perko

Regular price $5.99 USD

Regular price ~~$16.19 USD~~ Sale price $5.99 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 $173.99 USD

Regular price ~~$231.00 USD~~ Sale price $173.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $49.99 USD

Regular price ~~$66.00 USD~~ Sale price $49.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $77.99 USD

Regular price ~~$104.00 USD~~ Sale price $77.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $64.99 USD

Regular price ~~$86.00 USD~~ Sale price $64.99 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
Attwood Stainless Steel Thru-Hull Short Straight Barbed - 1-1/2" Inner Diameter [66545-3]

Sale

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

Vendor:
Attwood Marine

Regular price $55.99 USD

Regular price ~~$61.99 USD~~ Sale price $55.99 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 $90.99 USD

Regular price ~~$102.83 USD~~ Sale price $90.99 USD
Unit price per

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

Sale

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

Vendor:
GROCO

Regular price $98.99 USD

Regular price ~~$131.00 USD~~ Sale price $98.99 USD
Unit price per

Sale

1
2
3
…
5

Facebook
Instagram
TikTok

Subscribe to our emails

Email

Facebook
Instagram
TikTok

Payment methods

© 2026, First Stop Marine Powered by Shopify

Refund policy
Privacy policy
Terms of service
Shipping policy
Contact information

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