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Celebrating over 50 years of Trusted Marine Service
Over 50 years of Trusted Marine Service

Marine Valves & Thruhull Fittings - Seacocks & Ball Valves

Premium Marine Valves & Thruhull Fittings - Seacocks, Ball Valves & Flow Control

Explore our comprehensive selection of marine valves, thruhull fittings, seacocks, and flow control components designed for safe, reliable water management aboard vessels. From critical below-waterline seacocks to plumbing ball valves, our fittings ensure watertight integrity and precise flow control in all marine systems.

Product Categories

  • Seacocks & Thruhull Valves: Bronze and composite seacocks for below-waterline applications
  • Ball Valves: Quarter-turn ball valves in plastic, bronze, and stainless steel (BSPT threading)
  • Gate Valves: Full-flow gate valves for plumbing and engine cooling systems
  • Thruhull Fittings: Bronze and composite thruhull penetrations with mushroom heads
  • Check Valves: One-way valves preventing backflow in bilge and plumbing systems
  • Hose Adaptors: Threaded-to-barb adaptors for secure hose connections
  • Valve Accessories: Handles, unions, caps, and mounting hardware

All valves and thruhull fittings are engineered to withstand harsh marine environments with corrosion-resistant materials including bronze, reinforced plastic, and marine-grade stainless steel. BSPT (British Standard Pipe Taper) threading ensures leak-free connections throughout your vessel's plumbing systems.

Critical safety components for freshwater systems, waste water systems, engine cooling, bilge systems, and all below-waterline penetrations. Proper valve selection and installation protects your vessel's watertight integrity and prevents catastrophic flooding.

Filters

Johnson Pump 81-47238 Y-Valve 1-1/2" Inner Diameter, 1" Straight

Johnson Pump 81-47238 Marine Sanitation Y-Valve – 1-1/2" ID Ports, 1" Straight

$140.79 - $140.79
$140.79
$140.79 - $140.79
$140.79
Item locally warehoused

Johnson Pump 81-47238 Marine Sanitation Y-Valve Part Number: 81-47238 (distributor SKU: 189-814723801) Brand: Johnson Pump Type: Marine sanitation ...

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$140.79 - $140.79
$140.79
$140.79 - $140.79
$140.79

Buck Algonquin Bronze Ball Valve 3/4"

$82.58 - $82.58
$82.58
$82.58 - $82.58
$82.58
13 in stock

Buck Algonquin Bronze Ball Valve — 3/4"A reliable, full-bore bronze ball valve for marine seacock and plumbing applications. This 3/4" valve is des...

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$82.58 - $82.58
$82.58
$82.58 - $82.58
$82.58

Buck Algonquin Bronze Ball Valve 1"

$107.82 - $107.82
$107.82
$107.82 - $107.82
$107.82
Only 3 left!

Buck Algonquin Bronze Ball Valve — 1"A full-bore bronze ball valve built for marine seacock and inline shutoff applications. This 1" valve installs...

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$107.82 - $107.82
$107.82
$107.82 - $107.82
$107.82

Volvo Penta IPS Shift Control Solenoid Valve 11418522

$666.00 - $666.00
$666.00
$666.00 - $666.00
$666.00
Only 1 left!

Volvo Penta IPS Shift Control Solenoid Valve — Part No. 11418522 This is the genuine OEM Volvo Penta shift control solenoid valve for compatible IP...

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$666.00 - $666.00
$666.00
$666.00 - $666.00
$666.00

Ball Valve - 1" Single Union - BSPP Threaded - Plastic - Orange Handle

$32.12 - $32.12
$32.12
$32.12 - $32.12
$32.12
Only 1 left!

Ball Valve - 1" Single Union - BSPP Threaded - PlasticDurable plastic ball valve with single union design and 1" BSPP (British Standard Pipe Parall...

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$32.12 - $32.12
$32.12
$32.12 - $32.12
$32.12

Ball Valve - 2" Single Union - BSPP Threaded - Plastic - Orange Handle

$87.03 - $87.03
$87.03
$87.03 - $87.03
$87.03
12 in stock

Ball Valve - 2" Single Union - BSPP Threaded - PlasticDurable plastic ball valve with single union design and 2" BSPP (British Standard Pipe Parall...

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$87.03 - $87.03
$87.03
$87.03 - $87.03
$87.03

Ball Valve - 1-1/2" Single Union - BSPP Threaded - Plastic - Orange Handle

$57.61 - $57.61
$57.61
$57.61 - $57.61
$57.61
24 in stock

Ball Valve - 1-1/2" Single Union - BSPP Threaded - PlasticDurable plastic ball valve with single union design and 1-1/2" BSPP (British Standard Pip...

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$57.61 - $57.61
$57.61
$57.61 - $57.61
$57.61
Seachoice Mega-Flow Dripless Thru Hull Fitting, 316 Stainless Steel, Fits 5/8 in. Hose, 1-1/2 in. Max. Hull

Seachoice Mega-Flow Dripless Thru-Hull Fitting — 316 SS, 5/8" Hose, 1-1/2" Max Hull (50-18591)

$62.34 - $62.34
$62.34
$62.34 - $62.34
$62.34
Item locally warehoused

Seachoice Mega-Flow Dripless Thru-Hull Fitting — 316 Stainless Steel, 5/8" HoseA polished 316 stainless-steel thru-hull fitting engineered for maxi...

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$62.34 - $62.34
$62.34
$62.34 - $62.34
$62.34

Ball Valve - 1" (25mm) - PVC - Marine Plumbing Shut-Off Valve

$9.07 - $9.07
$9.07
$9.07 - $9.07
$9.07
100 in stock

1" PVC Ball Valve for Marine PlumbingReliable quarter-turn ball valve designed for marine plumbing systems. Features durable PVC construction with ...

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$9.07 - $9.07
$9.07
$9.07 - $9.07
$9.07

Ball Valve - 3/4" (19mm) PVC Marine Shut-Off

$5.51 - $5.51
$5.51
$5.51 - $5.51
$5.51
160 in stock

3/4" PVC Ball Valve — Marine Plumbing Shut-OffA dependable quarter-turn shut-off valve built for the demands of onboard plumbing. Constructed from ...

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$5.51 - $5.51
$5.51
$5.51 - $5.51
$5.51

Ball Valve - 1/2" (13mm) - PVC - Marine Plumbing Shut-Off Valve

$3.51 - $3.51
$3.51
$3.51 - $3.51
$3.51
240 in stock

1/2" PVC Ball Valve for Marine PlumbingReliable quarter-turn ball valve designed for marine plumbing systems. Features durable PVC construction wit...

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$3.51 - $3.51
$3.51
$3.51 - $3.51
$3.51

LALIZAS Ball Valve 1-1/2" PVC - Full Port Marine Grade Shut-Off Valve

$16.04 - $16.04
$16.04
$16.04 - $16.04
$16.04
50 in stock

Professional Marine Grade PVC Ball Valve - 1-1/2 InchThe LALIZAS Ball Valve is a professional-grade 1-1/2" PVC shut-off valve designed for marine p...

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$16.04 - $16.04
$16.04
$16.04 - $16.04
$16.04

LALIZAS Ball Valve 1-1/4" PVC - Full Port Marine Grade Shut-Off Valve

$13.31 - $13.31
$13.31
$13.31 - $13.31
$13.31
65 in stock

Professional Marine Grade PVC Ball Valve - 1-1/4 InchThe LALIZAS Ball Valve is a professional-grade 1-1/4" PVC shut-off valve designed for marine p...

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$13.31 - $13.31
$13.31
$13.31 - $13.31
$13.31
Save 14% Save %

Ball Valve 1 1/2" Single Union BSPT - Plastic Grey

$69.99
$69.99 - $69.99
$69.99
$60.11
$60.11 - $60.11
$60.11
In stock

Premium Ball Valve 1 1/2" Single Union BSPT - Plastic GreyThis professional-grade 1 1/2" ball valve features a single union BSPT (British Standard ...

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$69.99
$69.99 - $69.99
$69.99
$60.11
$60.11 - $60.11
$60.11
Save 14% Save %
Save 14% Save %

Ball Valve 1 1/4" Single Union BSPT - Plastic Grey

$54.99
$54.99 - $54.99
$54.99
$47.51
$47.51 - $47.51
$47.51
In stock

Premium Ball Valve 1 1/4" Single Union BSPT - Plastic GreyThis professional-grade 1 1/4" ball valve features a single union BSPT (British Standard ...

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$54.99
$54.99 - $54.99
$54.99
$47.51
$47.51 - $47.51
$47.51
Save 14% Save %
Save 16% Save %

Ball Valve 1" Single Union BSPT - Plastic Grey

$39.99
$39.99 - $39.99
$39.99
$33.55
$33.55 - $33.55
$33.55
In stock

Premium Ball Valve 1" Single Union BSPT - Plastic GreyThis professional-grade 1" ball valve features a single union BSPT (British Standard Pipe Tap...

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$39.99
$39.99 - $39.99
$39.99
$33.55
$33.55 - $33.55
$33.55
Save 16% Save %
Save 18% Save %

Ball Valve 3/4" Single Union BSPT - Plastic Grey

$32.99
$32.99 - $32.99
$32.99
$27.03
$27.03 - $27.03
$27.03
In stock

Premium Ball Valve 3/4" Single Union BSPT - Plastic GreyThis professional-grade 3/4" ball valve features a single union BSPT (British Standard Pipe...

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$32.99
$32.99 - $32.99
$32.99
$27.03
$27.03 - $27.03
$27.03
Save 18% Save %
Save 15% Save %

Ball Valve 1/2" Single Union BSPT - Plastic Grey

$27.99
$27.99 - $27.99
$27.99
$23.87
$23.87 - $23.87
$23.87
In stock

Premium Ball Valve 1/2" Single Union BSPT - Plastic GreyThis professional-grade 1/2" ball valve features a single union BSPT (British Standard Pipe...

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$27.99
$27.99 - $27.99
$27.99
$23.87
$23.87 - $23.87
$23.87
Save 15% Save %
Save 22% Save %

Non-Return Valve - 3/4" to 1" Inlet - 1-1/4" to 1-1/2" Outlet - 90° Elbow - Quick Release Clip

$32.99
$32.99 - $32.99
$32.99
$25.67
$25.67 - $25.67
$25.67
In stock

Premium Non-Return Valve - 90° Elbow with Quick Release ClipThis professional-grade non-return valve features a 90° elbow configuration with quick ...

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$32.99
$32.99 - $32.99
$32.99
$25.67
$25.67 - $25.67
$25.67
Save 22% Save %
Save 24% Save %

Non-Return Valve - 3/4" to 1" Inlet - 1-1/4" to 1-1/2" Outlet - 90° Elbow - Quick Release Clip

$32.99
$32.99 - $32.99
$32.99
$24.91
$24.91 - $24.91
$24.91
In stock

Premium Non-Return Valve - 90° Elbow with Quick Release ClipThis professional-grade non-return valve features a 90° elbow configuration with quick ...

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$32.99
$32.99 - $32.99
$32.99
$24.91
$24.91 - $24.91
$24.91
Save 24% Save %