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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

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1st Class Eligible (133 products)
Boat Outfitting (2 products)
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Brand_Attwood Marine (7 products)
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Brand_Viega (77 products)
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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)
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280 products

Perko 4" Round Bronze Strainer MADE IN THE USA [0086DP4PLB]

Sale

Perko 4" Round Bronze Strainer MADE IN THE USA [0086DP4PLB]

Vendor:
Perko

Regular price $27.99 USD

Regular price ~~$55.39 USD~~ Sale price $27.99 USD
Unit price per

Sale
Perko 1-1/2" Pipe to Hose Adapter 90 Degree Bronze MADE IN THE USA [0063DP8PLB]

Sale

Perko 1-1/2" Pipe to Hose Adapter 90 Degree Bronze MADE IN THE USA [0063DP8PLB]

Vendor:
Perko

Regular price $44.99 USD

Regular price ~~$77.97 USD~~ Sale price $44.99 USD
Unit price per

Sale
GROCO 1/4" NPT #316 Stainless Steel In-Line Ball Valve [IBV-250-S]

Sale

GROCO 1/4" NPT #316 Stainless Steel In-Line Ball Valve [IBV-250-S]

Vendor:
GROCO

Regular price $42.99 USD

Regular price ~~$57.00 USD~~ Sale price $42.99 USD
Unit price per

Sale
Perko 0541Vented Fill f/1-1/2" Hose - Straight Neck - Gas [0541DPGCHR]

Sale

Perko 0541Vented Fill f/1-1/2" Hose - Straight Neck - Gas [0541DPGCHR]

Vendor:
Perko

Regular price $59.99 USD

Regular price ~~$84.58 USD~~ Sale price $59.99 USD
Unit price per

Sale
GROCO Backing Block f/1-1/4" 1-1/2" Seacocks [BB-2]

Sale

GROCO Backing Block f/1-1/4" 1-1/2" Seacocks [BB-2]

Vendor:
GROCO

Regular price $66.99 USD

Regular price ~~$89.00 USD~~ Sale price $66.99 USD
Unit price per

Sale
Perko 1" Pipe To Hose Adapter Straight Bronze MADE IN THE USA [0076DP6PLB]

Sale

Perko 1" Pipe To Hose Adapter Straight Bronze MADE IN THE USA [0076DP6PLB]

Vendor:
Perko

Regular price $16.99 USD

Regular price ~~$25.99 USD~~ Sale price $16.99 USD
Unit price per

Sale
Perko Fuel System Locking Insert f/ 1-1/2" Vented Fills [0525DP0BLK]

Sale

Perko Fuel System Locking Insert f/ 1-1/2" Vented Fills [0525DP0BLK]

Vendor:
Perko

Regular price $41.99 USD

Regular price ~~$52.88 USD~~ Sale price $41.99 USD
Unit price per

Sale
GROCO Bronze Pipe Nipple - 1-1/4" NPT [PN-1250]

Sale

GROCO Bronze Pipe Nipple - 1-1/4" NPT [PN-1250]

Vendor:
GROCO

Regular price $25.99 USD

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

Sale
Perko Gas Fill w/ Locking Cap f/ 1-1/2" Hose [0599DPGCHR]

Sale

Perko Gas Fill w/ Locking Cap f/ 1-1/2" Hose [0599DPGCHR]

Vendor:
Perko

Regular price $77.99 USD

Regular price ~~$110.05 USD~~ Sale price $77.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 3/4" 90 Degree Elbow [91700]

Sale

Viega MegaPress 316 FKM 3/4" 90 Degree Elbow [91700]

Vendor:
Viega

Regular price $152.99 USD

Regular price ~~$197.55 USD~~ Sale price $152.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/2" 90 Degree Elbow [91715]

Sale

Viega MegaPress 316 FKM 1-1/2" 90 Degree Elbow [91715]

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 Tee - 2" x 2" x 2" [91620]

Sale

Viega MegaPress 316 FKM Tee - 2" x 2" x 2" [91620]

Vendor:
Viega

Regular price $587.99 USD

Regular price ~~$761.38 USD~~ Sale price $587.99 USD
Unit price per

Sale
Viega ProPress 1/2" - 90 Copper Elbow - Double Press Connection - Smart Connect Technology [77317]

Sale

Viega ProPress 1/2" - 90 Copper Elbow - Double Press Connection - Smart Connect Technology [77317]

Vendor:
Viega

Regular price $5.99 USD

Regular price ~~$7.30 USD~~ Sale price $5.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 3/4" Cap [91820]

Sale

Viega MegaPress 316 FKM 3/4" Cap [91820]

Vendor:
Viega

Regular price $75.99 USD

Regular price ~~$98.06 USD~~ Sale price $75.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 2" Coupling w/Stop [91125]

Sale

Viega MegaPress 316 FKM 2" Coupling w/Stop [91125]

Vendor:
Viega

Regular price $158.99 USD

Regular price ~~$205.83 USD~~ Sale price $158.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/4" Union [91940]

Sale

Viega MegaPress 316 FKM 1-1/4" Union [91940]

Vendor:
Viega

Regular price $639.99 USD

Regular price ~~$829.52 USD~~ Sale price $639.99 USD
Unit price per

Sale
TH-Marine Push-In Drain Plug f/1-1/8" Thru-Hull All Purpose Drains [PP-118-DP]

Sale

TH-Marine Push-In Drain Plug f/1-1/8" Thru-Hull All Purpose Drains [PP-118-DP]

Vendor:
T-H Marine Supplies

Regular price $7.99 USD

Regular price ~~$10.62 USD~~ Sale price $7.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1" Cap [91825]

Sale

Viega MegaPress 316 FKM 1" Cap [91825]

Vendor:
Viega

Regular price $99.99 USD

Regular price ~~$128.54 USD~~ Sale price $99.99 USD
Unit price per

Sale
GROCO 1" NPT x 1-1/4" ID Bronze Full Flow 90 Elbow Pipe to Hose Fitting [FFC-1000]

Sale

GROCO 1" NPT x 1-1/4" ID Bronze Full Flow 90 Elbow Pipe to Hose Fitting [FFC-1000]

Vendor:
GROCO

Regular price $27.99 USD

Regular price ~~$37.00 USD~~ Sale price $27.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/2" Coupling w/Stop [91120]

Sale

Viega MegaPress 316 FKM 1-1/2" Coupling w/Stop [91120]

Vendor:
Viega

Regular price $126.99 USD

Regular price ~~$163.35 USD~~ Sale price $126.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/4" Cap [91830]

Sale

Viega MegaPress 316 FKM 1-1/4" Cap [91830]

Vendor:
Viega

Regular price $130.99 USD

Regular price ~~$169.36 USD~~ Sale price $130.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM Reducer - 1-1/2" x 1-1/4" [91920]

Sale

Viega MegaPress 316 FKM Reducer - 1-1/2" x 1-1/4" [91920]

Vendor:
Viega

Regular price $268.99 USD

Regular price ~~$348.19 USD~~ Sale price $268.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 2" Cap [91840]

Sale

Viega MegaPress 316 FKM 2" Cap [91840]

Vendor:
Viega

Regular price $221.99 USD

Regular price ~~$287.76 USD~~ Sale price $221.99 USD
Unit price per

Sale
Viega MegaPress 316 FKM 1-1/2" Union [91945]

Sale

Viega MegaPress 316 FKM 1-1/2" Union [91945]

Vendor:
Viega

Regular price $863.99 USD

Regular price ~~$1,118.73 USD~~ Sale price $863.99 USD
Unit price per

Sale

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