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

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 - Fittings

Filter and sort Filter

Filter and sort

Filter

280 products

Availability

In stock (280 products)
Out of stock (0 products)

Clear

Price

The highest price is $2,714.99

$

From

$

To

Clear

Brand

Albin Group (1 products)
Attwood Marine (7 products)
Beckson Marine (2 products)
Dometic (4 products)
Forespar Performance Products (4 products)
GROCO (114 products)
Jabsco (2 products)
Johnson Pump (1 products)
Perko (46 products)
Raritan (1 products)
Rule (4 products)
Scandvik (1 products)
Shurflo by Pentair (3 products)
T-H Marine Supplies (9 products)
Viega (77 products)
Whitecap (4 products)

Clear

Product type

Accessories (3 products)
Fittings (277 products)

Clear

More filters

1st Class Eligible (133 products)
Boat Outfitting (2 products)
Boat Outfitting | Cleaning (2 products)
Brand_Albin Group (1 products)
Brand_Attwood Marine (7 products)
Brand_Beckson Marine (2 products)
Brand_Dometic (4 products)
Brand_Forespar Performance Products (4 products)
Brand_GROCO (114 products)
Brand_Jabsco (2 products)
Brand_Johnson Pump (1 products)
Brand_Perko (46 products)
Brand_Raritan (1 products)
Brand_Rule (4 products)
Brand_Scandvik (1 products)
Brand_Shurflo by Pentair (3 products)
Brand_T-H Marine Supplies (9 products)
Brand_Viega (77 products)
Brand_Whitecap (4 products)
Clearance (7 products)
Marine Hardware (17 products)
Marine Hardware | Deck Fills (15 products)
Marine Hardware | Vents (2 products)
Marine Plumbing & Ventilation (280 products)
Marine Plumbing & Ventilation | Accessories (3 products)
Marine Plumbing & Ventilation | Fittings (280 products)
Specials (8 products)

Clear

Sort by:

Remove all

Sort by:

280 products

Viega MegaPress 316 FKM Tee - 1-1/2" x 1-1/2" x 1-1/2" [91615]

Sale

Viega MegaPress 316 FKM Tee - 1-1/2" x 1-1/2" x 1-1/2" [91615]

Vendor:
Viega

Regular price $535.99 USD

Regular price ~~$694.25 USD~~ Sale price $535.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1/2" Union [91925]

Sale

Viega MegaPress 316 FKM 1/2" Union [91925]

Vendor:
Viega

Regular price $369.99 USD

Regular price ~~$479.47 USD~~ Sale price $369.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/2" Cap [91835]

Sale

Viega MegaPress 316 FKM 1-1/2" Cap [91835]

Vendor:
Viega

Regular price $187.99 USD

Regular price ~~$243.49 USD~~ Sale price $187.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 3/4" Union [91930]

Sale

Viega MegaPress 316 FKM 3/4" Union [91930]

Vendor:
Viega

Regular price $426.99 USD

Regular price ~~$552.23 USD~~ Sale price $426.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Tee - 1" x 1" x 1" [91610]

Sale

Viega MegaPress 316 FKM Tee - 1" x 1" x 1" [91610]

Vendor:
Viega

Regular price $351.99 USD

Regular price ~~$455.60 USD~~ Sale price $351.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 2" Union [91950]

Sale

Viega MegaPress 316 FKM 2" Union [91950]

Vendor:
Viega

Regular price $1,085.99 USD

Regular price ~~$1,407.60 USD~~ Sale price $1,085.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM FPT Adapter - 3/4" x 3/4" (FPT) [91245]

Sale

Viega MegaPress 316 FKM FPT Adapter - 3/4" x 3/4" (FPT) [91245]

Vendor:
Viega

Regular price $137.99 USD

Regular price ~~$178.07 USD~~ Sale price $137.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Reducer - 1" x 3/4" [91275]

Sale

Viega MegaPress 316 FKM Reducer - 1" x 3/4" [91275]

Vendor:
Viega

Regular price $197.99 USD

Regular price ~~$255.47 USD~~ Sale price $197.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1/2" 45 Degree Elbow [91755]

Sale

Viega MegaPress 316 FKM 1/2" 45 Degree Elbow [91755]

Vendor:
Viega

Regular price $131.99 USD

Regular price ~~$170.53 USD~~ Sale price $131.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM MPT Adapter - 3/4" x 1/2" (MPT) [91210]

Sale

Viega MegaPress 316 FKM MPT Adapter - 3/4" x 1/2" (MPT) [91210]

Vendor:
Viega

Regular price $105.99 USD

Regular price ~~$136.98 USD~~ Sale price $105.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1" 45 Degree Street Elbow [91795]

Sale

Viega MegaPress 316 FKM 1" 45 Degree Street Elbow [91795]

Vendor:
Viega

Regular price $170.99 USD

Regular price ~~$221.27 USD~~ Sale price $170.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/2" 45 Degree Elbow [91775]

Sale

Viega MegaPress 316 FKM 1-1/2" 45 Degree Elbow [91775]

Vendor:
Viega

Regular price $308.99 USD

Regular price ~~$399.69 USD~~ Sale price $308.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 3/4" Coupling w/Stop [91105]

Sale

Viega MegaPress 316 FKM 3/4" Coupling w/Stop [91105]

Vendor:
Viega

Regular price $76.99 USD

Regular price ~~$99.77 USD~~ Sale price $76.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Tee - 1-1/4" x 1-1/4" x 1-1/4" [91640]

Sale

Viega MegaPress 316 FKM Tee - 1-1/4" x 1-1/4" x 1-1/4" [91640]

Vendor:
Viega

Regular price $389.99 USD

Regular price ~~$504.54 USD~~ Sale price $389.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1/2" Slip Coupling w/Stop [91290]

Sale

Viega MegaPress 316 FKM 1/2" Slip Coupling w/Stop [91290]

Vendor:
Viega

Regular price $72.99 USD

Regular price ~~$93.80 USD~~ Sale price $72.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Reducer - 2" x 1-1/2" [91285]

Sale

Viega MegaPress 316 FKM Reducer - 2" x 1-1/2" [91285]

Vendor:
Viega

Regular price $293.99 USD

Regular price ~~$381.02 USD~~ Sale price $293.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1/2" Coupling w/Stop [91100]

Sale

Viega MegaPress 316 FKM 1/2" Coupling w/Stop [91100]

Vendor:
Viega

Regular price $62.99 USD

Regular price ~~$80.51 USD~~ Sale price $62.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Tee - 3/4" x 3/4" x 3/4" [91605]

Sale

Viega MegaPress 316 FKM Tee - 3/4" x 3/4" x 3/4" [91605]

Vendor:
Viega

Regular price $301.99 USD

Regular price ~~$390.86 USD~~ Sale price $301.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/4" 90 Degree Street Elbow [91740]

Sale

Viega MegaPress 316 FKM 1-1/4" 90 Degree Street Elbow [91740]

Vendor:
Viega

Regular price $210.99 USD

Regular price ~~$272.73 USD~~ Sale price $210.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM MPT Adapter - 1-1/4" x 1-1/4" (MPT) [91225]

Sale

Viega MegaPress 316 FKM MPT Adapter - 1-1/4" x 1-1/4" (MPT) [91225]

Vendor:
Viega

Regular price $168.99 USD

Regular price ~~$218.01 USD~~ Sale price $168.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/4" Slip Coupling w/o Stop [91305]

Sale

Viega MegaPress 316 FKM 1-1/4" Slip Coupling w/o Stop [91305]

Vendor:
Viega

Regular price $134.99 USD

Regular price ~~$174.00 USD~~ Sale price $134.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 3/4" 45 Degree Street Elbow [91790]

Sale

Viega MegaPress 316 FKM 3/4" 45 Degree Street Elbow [91790]

Vendor:
Viega

Regular price $137.99 USD

Regular price ~~$178.74 USD~~ Sale price $137.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 2" Slip Coupling w/o Stop [91315]

Sale

Viega MegaPress 316 FKM 2" Slip Coupling w/o Stop [91315]

Vendor:
Viega

Regular price $190.99 USD

Regular price ~~$246.99 USD~~ Sale price $190.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Tee - 1/2" x 1/2" x 1/2" [91600]

Sale

Viega MegaPress 316 FKM Tee - 1/2" x 1/2" x 1/2" [91600]

Vendor:
Viega

Regular price $269.99 USD

Regular price ~~$349.43 USD~~ Sale price $269.99 USD
Unit price per

Sale

1
…
6
7
8
9
10
…
12

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
Shipping policy
Contact information

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