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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 - Fittings

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Brand_GROCO (106 products)
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Brand_T-H Marine Supplies (9 products)
Brand_Viega (68 products)
Brand_Whitecap (3 products)
Clearance (5 products)
Marine Hardware (12 products)
Marine Hardware | Deck Fills (12 products)
Marine Plumbing & Ventilation (254 products)
Marine Plumbing & Ventilation | Accessories (3 products)
Marine Plumbing & Ventilation | Fittings (254 products)
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254 products

GROCO Bronze Round Hull Strainer w/Access Door f/Up To 4" Thru-Hull [RSC-4000]

Sale

GROCO Bronze Round Hull Strainer w/Access Door f/Up To 4" Thru-Hull [RSC-4000]

Vendor:
GROCO

Regular price $417.99 USD

Regular price ~~$588.00 USD~~ Sale price $417.99 USD
Unit price per

Sale
Forespar Marelon Full-Flow Seacock 1-1/4" Mushroom Through-Hull [904045ABYC]

Sale

Forespar Marelon Full-Flow Seacock 1-1/4" Mushroom Through-Hull [904045ABYC]

Vendor:
Forespar Performance Products

Regular price $142.99 USD

Regular price ~~$184.95 USD~~ Sale price $142.99 USD
Unit price per

Sale
Forespar Marelon Full-Flow Seacock 1-1/2" Mushroom Through-Hull [904046ABYC]

Sale

Forespar Marelon Full-Flow Seacock 1-1/2" Mushroom Through-Hull [904046ABYC]

Vendor:
Forespar Performance Products

Regular price $153.99 USD

Regular price ~~$199.95 USD~~ Sale price $153.99 USD
Unit price per

Sale
Attwood Stainless Steel Garboard Drain Plug - 7/8" Diameter [7557-7]

Sale

Attwood Stainless Steel Garboard Drain Plug - 7/8" Diameter [7557-7]

Vendor:
Attwood Marine

Regular price $33.99 USD

Regular price ~~$37.99 USD~~ Sale price $33.99 USD
Unit price per

Sale
Perko Spare Gas Cap w/O-Ring & Cable [1270DPG99A]

Sale

Perko Spare Gas Cap w/O-Ring & Cable [1270DPG99A]

Vendor:
Perko

Regular price $25.99 USD

Regular price ~~$30.48 USD~~ Sale price $25.99 USD
Unit price per

Sale
Perko Garboard Drain & Drain Plug Assy Cast Bronze/Brass MADE IN THE USA [0714DP1PLB]

Sale

Perko Garboard Drain & Drain Plug Assy Cast Bronze/Brass MADE IN THE USA [0714DP1PLB]

Vendor:
Perko

Regular price $32.99 USD

Regular price ~~$53.79 USD~~ Sale price $32.99 USD
Unit price per

Sale
GROCO 3/4" Bronze In-Line Check Valve [CV-75]

Sale

GROCO 3/4" Bronze In-Line Check Valve [CV-75]

Vendor:
GROCO

Regular price $29.99 USD

Regular price ~~$39.00 USD~~ Sale price $29.99 USD
Unit price per

Sale
GROCO 2"" NPT x 2" ID Stainless Steel Pipe to Hose Straight Fitting [PTH-2000-S]

Sale

GROCO 2"" NPT x 2" ID Stainless Steel Pipe to Hose Straight Fitting [PTH-2000-S]

Vendor:
GROCO

Regular price $48.99 USD

Regular price ~~$64.00 USD~~ Sale price $48.99 USD
Unit price per

Sale
GROCO 1-1/4" Hose Barb Stainless Straight Deck Drain [SCUS-1250]

Sale

GROCO 1-1/4" Hose Barb Stainless Straight Deck Drain [SCUS-1250]

Vendor:
GROCO

Regular price $107.99 USD

Regular price ~~$144.00 USD~~ Sale price $107.99 USD
Unit price per

Sale
GROCO Deck Scupper 90 Degree 1-1/2" Hose Connection [SCUS-1590]

Sale

GROCO Deck Scupper 90 Degree 1-1/2" Hose Connection [SCUS-1590]

Vendor:
GROCO

Regular price $139.99 USD

Regular price ~~$186.00 USD~~ Sale price $139.99 USD
Unit price per

Sale
GROCO 1/2" 5-Port Tank Selector Valve [FV-550-L]

Sale

GROCO 1/2" 5-Port Tank Selector Valve [FV-550-L]

Vendor:
GROCO

Regular price $134.99 USD

Regular price ~~$180.00 USD~~ Sale price $134.99 USD
Unit price per

Sale
Rule 1207R 1-1/8" Port - 90 Barb [1207R]

Sale

Rule 1207R 1-1/8" Port - 90 Barb [1207R]

Vendor:
Rule

Regular price $16.99 USD

Regular price ~~$17.99 USD~~ Sale price $16.99 USD
Unit price per

Sale
GROCO 2" NPT Stainless Steel In-Line Ball Valve [IBV-2000-S]

Sale

GROCO 2" NPT Stainless Steel In-Line Ball Valve [IBV-2000-S]

Vendor:
GROCO

Regular price $168.99 USD

Regular price ~~$225.00 USD~~ Sale price $168.99 USD
Unit price per

Sale
GROCO Perforated Hull Strainer w/Access Door 3" Max Thru-Hull [APHS-3000-1]

Sale

GROCO Perforated Hull Strainer w/Access Door 3" Max Thru-Hull [APHS-3000-1]

Vendor:
GROCO

Regular price $416.99 USD

Regular price ~~$555.00 USD~~ Sale price $416.99 USD
Unit price per

Sale
T-H Marine Washdown Fitting w/Shutoff Valve [WDV-1-DP]

Sale

T-H Marine Washdown Fitting w/Shutoff Valve [WDV-1-DP]

Vendor:
T-H Marine Supplies

Regular price $39.99 USD

Regular price ~~$45.99 USD~~ Sale price $39.99 USD
Unit price per

Sale
Perko Spare Cap f/1313 Gas Fill [0126DP0BLK]

Sale

Perko Spare Cap f/1313 Gas Fill [0126DP0BLK]

Vendor:
Perko

Regular price $13.99 USD

Regular price ~~$16.94 USD~~ Sale price $13.99 USD
Unit price per

Sale
Perko 1" Pipe to Hose Adapter 90 Degree Bronze MADE IN THE USA [0063DP6PLB]

Sale

Perko 1" Pipe to Hose Adapter 90 Degree Bronze MADE IN THE USA [0063DP6PLB]

Vendor:
Perko

Regular price $26.99 USD

Regular price ~~$46.37 USD~~ Sale price $26.99 USD
Unit price per

Sale
GROCO 3/4" NPT x 1" ID Bronze Full Flow 90 Elbow Pipe to Hose Fitting [FFC-750]

Sale

GROCO 3/4" NPT x 1" ID Bronze Full Flow 90 Elbow Pipe to Hose Fitting [FFC-750]

Vendor:
GROCO

Regular price $18.99 USD

Regular price ~~$25.00 USD~~ Sale price $18.99 USD
Unit price per

Sale
GROCO 1" Bronze Tri-Flanged Ball Valve/Seacock [FBV-1000]

Sale

GROCO 1" Bronze Tri-Flanged Ball Valve/Seacock [FBV-1000]

Vendor:
GROCO

Regular price $90.99 USD

Regular price ~~$121.00 USD~~ Sale price $90.99 USD
Unit price per

Sale
Forespar Marelon Full-Flow Seacock 1" Mushroom Through-Hull [904044ABYC]

Sale

Forespar Marelon Full-Flow Seacock 1" Mushroom Through-Hull [904044ABYC]

Vendor:
Forespar Performance Products

Regular price $119.99 USD

Regular price ~~$154.95 USD~~ Sale price $119.99 USD
Unit price per

Sale
GROCO 3/4" NPT x 1" Bronze Full Flow Pipe to Hose Straight Fitting [FF-750]

Sale

GROCO 3/4" NPT x 1" Bronze Full Flow Pipe to Hose Straight Fitting [FF-750]

Vendor:
GROCO

Regular price $11.99 USD

Regular price ~~$15.00 USD~~ Sale price $11.99 USD
Unit price per

Sale
GROCO 3/4" NPT x 3/4" ID Bronze 90 Degree Pipe to Hose Fitting Standard Flow Elbow [PTHC-750]

Sale

GROCO 3/4" NPT x 3/4" ID Bronze 90 Degree Pipe to Hose Fitting Standard Flow Elbow [PTHC-750]

Vendor:
GROCO

Regular price $11.99 USD

Regular price ~~$16.00 USD~~ Sale price $11.99 USD
Unit price per

Sale
Perko 6" Round Bronze Strainer MADE IN THE USA [0086006PLB]

Sale

Perko 6" Round Bronze Strainer MADE IN THE USA [0086006PLB]

Vendor:
Perko

Regular price $54.99 USD

Regular price ~~$97.24 USD~~ Sale price $54.99 USD
Unit price per

Sale
Perko Replacement Drain Plug f/0124000PLB [012400099B]

Sale

Perko Replacement Drain Plug f/0124000PLB [012400099B]

Vendor:
Perko

Regular price $55.99 USD

Regular price ~~$68.13 USD~~ Sale price $55.99 USD
Unit price per

Sale

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