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Free shipping on U.S. domestic orders of $89.99 or more! Standard flat-rate shipping of $9.95 (USPS). **exclusions apply**

Marine Plumbing & Ventilation - Thru-Hull Fittings

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Original price $8.06
Original price $8.06 - Original price $8.06
Original price $8.06
Current price $4.99
$4.99 - $4.99
Current price $4.99

Perko 3/4" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP5]

Perko
In stock

Perko 3/4" Thru-Hull Fitting f/ Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 3/4 Mounting Hole Diamete...

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Original price $8.06
Original price $8.06 - Original price $8.06
Original price $8.06
Current price $4.99
$4.99 - $4.99
Current price $4.99
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Original price $102.83
Original price $102.83 - Original price $102.83
Original price $102.83
Current price $77.99
$77.99 - $77.99
Current price $77.99

Attwood Stainless Steel Scupper Valve Barbed - 1-1/2" Hose Size [66553-3]

Attwood Marine
In stock

Stainless Steel Scupper Valve Barbed - 1-1/2" Hose SizePolish your image with these beautiful, durable stainless steel fittings. Why specify plast...

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Original price $102.83
Original price $102.83 - Original price $102.83
Original price $102.83
Current price $77.99
$77.99 - $77.99
Current price $77.99
Save $24.84 Save $0.00
Original price $313.00
Original price $313.00 - Original price $313.00
Original price $313.00
Current price $205.99
$205.99 - $205.99
Current price $205.99

GROCO 3" Bronze Thru-Hull Fitting w/Nut [TH-3000-W]

GROCO
Low stock

3" Bronze Thru-Hull Fitting with NutHigher flow rates are possible with this 3" GROCO thru-hull fitting than conventional thru-hulls.Features: NPS...

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Original price $313.00
Original price $313.00 - Original price $313.00
Original price $313.00
Current price $205.99
$205.99 - $205.99
Current price $205.99
Save $107.01 Save $0.00
Original price $52.00
Original price $52.00 - Original price $52.00
Original price $52.00
Current price $36.99
$36.99 - $36.99
Current price $36.99

GROCO 1" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1000-W]

GROCO
Low stock

1" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 1" Mater...

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Original price $52.00
Original price $52.00 - Original price $52.00
Original price $52.00
Current price $36.99
$36.99 - $36.99
Current price $36.99
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Original price $21.00
Original price $21.00 - Original price $21.00
Original price $21.00
Current price $14.99
$14.99 - $14.99
Current price $14.99

GROCO 3/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-750-WS]

GROCO
In stock

3/4" NPS NPT Combo Stainless Steel Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread #316 Stainless Steel Sizes from 1/2" to 3" UL...

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Original price $21.00
Original price $21.00 - Original price $21.00
Original price $21.00
Current price $14.99
$14.99 - $14.99
Current price $14.99
Save $6.01 Save $0.00
Original price $66.76
Original price $66.76 - Original price $66.76
Original price $66.76
Current price $32.99
$32.99 - $32.99
Current price $32.99

Perko 3/4" Thru-Hull Fitting w/Pipe Thread Bronze MADE IN THE USA [0322DP5PLB]

Perko
In stock

Perko 3/4" Thru-Hull Fitting w/ Pipe Thread BronzeFlange is machined to fit hull and grooved to retain bedding compound. Neckis threaded to appro...

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Original price $66.76
Original price $66.76 - Original price $66.76
Original price $66.76
Current price $32.99
$32.99 - $32.99
Current price $32.99
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Original price $27.99
Original price $27.99 - Original price $27.99
Original price $27.99
Current price $23.99
$23.99 - $23.99
Current price $23.99

Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner Diameter [66546-3]

Attwood Marine
In stock

Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner DiameterPolish your image with these beautiful, durable stainless steel fittings. ...

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Original price $27.99
Original price $27.99 - Original price $27.99
Original price $27.99
Current price $23.99
$23.99 - $23.99
Current price $23.99
Save $4.00 Save $0.00
Original price $79.00
Original price $79.00 - Original price $79.00
Original price $79.00
Current price $54.99
$54.99 - $54.99
Current price $54.99

GROCO 1-1/2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1500-WS]

GROCO
Low stock

1-1/2" Stainless Steel Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread #316 Stainless Steel Specifications:...

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Original price $79.00
Original price $79.00 - Original price $79.00
Original price $79.00
Current price $54.99
$54.99 - $54.99
Current price $54.99
Save $24.01 Save $0.00
Original price $16.19
Original price $16.19 - Original price $16.19
Original price $16.19
Current price $12.99
$12.99 - $12.99
Current price $12.99

Attwood White Plastic 90 Degree Thru-Hull Connector - 1-1/8" Inner Diameter [3879-3]

Attwood Marine
In stock

White Plastic 90 Degree Thru-Hull Connector - 1-1/8" Inner Diameter90° Thru-Hulls are ideal for tight installations, such as livewell overflow dra...

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Original price $16.19
Original price $16.19 - Original price $16.19
Original price $16.19
Current price $12.99
$12.99 - $12.99
Current price $12.99
Save $3.20 Save $0.00
Original price $123.00
Original price $123.00 - Original price $123.00
Original price $123.00
Current price $83.99
$83.99 - $83.99
Current price $83.99

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

GROCO
Low stock

1-1/2" Slotted Hi Speed Thru-Hull with NutFeatures: 1-1/2" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size...

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Original price $123.00
Original price $123.00 - Original price $123.00
Original price $123.00
Current price $83.99
$83.99 - $83.99
Current price $83.99
Save $39.01 Save $0.00
Original price $57.00
Original price $57.00 - Original price $57.00
Original price $57.00
Current price $39.99
$39.99 - $39.99
Current price $39.99

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

GROCO
Low stock

1" Slotted Hi Speed Thru-Hull with NutFeatures: 1" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size: 1" Mat...

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Original price $57.00
Original price $57.00 - Original price $57.00
Original price $57.00
Current price $39.99
$39.99 - $39.99
Current price $39.99
Save $17.01 Save $0.00
Original price $98.00
Original price $98.00 - Original price $98.00
Original price $98.00
Current price $66.99
$66.99 - $66.99
Current price $66.99

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

GROCO
Low stock

1-1/4" Slotted Hi Speed Thru-Hull with NutFeatures: 1-1/4" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size...

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Original price $98.00
Original price $98.00 - Original price $98.00
Original price $98.00
Current price $66.99
$66.99 - $66.99
Current price $66.99
Save $31.01 Save $0.00
Original price $40.00
Original price $40.00 - Original price $40.00
Original price $40.00
Current price $27.99
$27.99 - $27.99
Current price $27.99

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

GROCO
Low stock

3/4" Slotted Hi Speed Thru-Hull with NutFeatures: 3/4" NPSM / NPT combination thread C83600 Bronze With Nut Slotted Specifications: Hose Size: 3/...

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Original price $40.00
Original price $40.00 - Original price $40.00
Original price $40.00
Current price $27.99
$27.99 - $27.99
Current price $27.99
Save $12.01 Save $0.00
Original price $84.00
Original price $84.00 - Original price $84.00
Original price $84.00
Current price $58.99
$58.99 - $58.99
Current price $58.99

GROCO 1-1/4" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1250-W]

GROCO
In stock

1-1/4" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 1-1/...

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Original price $84.00
Original price $84.00 - Original price $84.00
Original price $84.00
Current price $58.99
$58.99 - $58.99
Current price $58.99
Save $25.01 Save $0.00
Original price $70.00
Original price $70.00 - Original price $70.00
Original price $70.00
Current price $48.99
$48.99 - $48.99
Current price $48.99

GROCO 1-1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting w/Nut [TH-1500-WS]

GROCO
In stock

1-1/2" NPS NPT Combo Stainless Steel Thru-Hull Fitting with NutFeatures: NPSM / NPT combination thread #316 Stainless Steel Sizes from 1/2" to 3" ...

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Original price $70.00
Original price $70.00 - Original price $70.00
Original price $70.00
Current price $48.99
$48.99 - $48.99
Current price $48.99
Save $21.01 Save $0.00
Original price $141.26
Original price $141.26 - Original price $141.26
Original price $141.26
Current price $67.99
$67.99 - $67.99
Current price $67.99

Perko 1" Intake Strainer Bronze MADE IN THE USA [0065DP6PLB]

Perko
In stock

Perko 1" Intake Strainer BronzeCast bronzeMachined SlotsTechnical Information: Maximum Pipe Size Inches: 1 Maximum Hull Thickness Inches: 2-1/2 ...

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Original price $141.26
Original price $141.26 - Original price $141.26
Original price $141.26
Current price $67.99
$67.99 - $67.99
Current price $67.99
Save $73.27 Save $0.00
Original price $32.00
Original price $32.00 - Original price $32.00
Original price $32.00
Current price $22.99
$22.99 - $22.99
Current price $22.99

GROCO Bronze Hose Barb Thru-Hull Fitting - 3/4" [HTH-750]

GROCO
In stock

Bronze Hose Barb Thru-Hull Fitting - 3/4" Features: NPS Thread With Hose Connection C83600 Bronze UL Listed 647B Specifications: Hose Size: 3/4" ...

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Original price $32.00
Original price $32.00 - Original price $32.00
Original price $32.00
Current price $22.99
$22.99 - $22.99
Current price $22.99
Save $9.01 Save $0.00
Original price $96.00
Original price $96.00 - Original price $96.00
Original price $96.00
Current price $65.99
$65.99 - $65.99
Current price $65.99

GROCO 1-1/2" Bronze Combo Scoop Thru-Hull w/Nut [STH-1500-W]

GROCO
In stock

1-1/2" Bronze Combo Scoop Thru-Hull w/Nut Features: Designed for increased flow compared to standard Thru Hulls NPSM / NPT combination thread C836...

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Original price $96.00
Original price $96.00 - Original price $96.00
Original price $96.00
Current price $65.99
$65.99 - $65.99
Current price $65.99
Save $30.01 Save $0.00
Original price $118.72
Original price $118.72 - Original price $118.72
Original price $118.72
Current price $68.99
$68.99 - $68.99
Current price $68.99

Perko 3/4" Thru-Hull Fitting w/Pipe Thread Bronze Extra Long - Max Hull 5" Thick [0348DP5PLB]

Perko
Low stock

Extra Long Thru-Hull Connection for Use with PipePart #: 0348DP5PLBFlange is machined to fit the hull and grooved to retain bedding compound neck ...

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Original price $118.72
Original price $118.72 - Original price $118.72
Original price $118.72
Current price $68.99
$68.99 - $68.99
Current price $68.99
Save $49.73 Save $0.00
Original price $109.63
Original price $109.63 - Original price $109.63
Original price $109.63
Current price $56.99
$56.99 - $56.99
Current price $56.99

Perko 3/4" Intake Strainer Bronze MADE IN THE USA [0065DP5PLB]

Perko
In stock

Perko 3/4" Intake Strainer BronzeCast bronzeMachined SlotsTechnical Information: Maximum Pipe Size Inches: 3/4 Maximum Hull Thickness Inches: 2-3...

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Original price $109.63
Original price $109.63 - Original price $109.63
Original price $109.63
Current price $56.99
$56.99 - $56.99
Current price $56.99
Save $52.64 Save $0.00
Original price $64.00
Original price $64.00 - Original price $64.00
Original price $64.00
Current price $44.99
$44.99 - $44.99
Current price $44.99

GROCO 1" Stainless Steel Extra Long Thru-Hull Fitting w/Nut [THXL-1000-WS]

GROCO
In stock

1" Stainless Steel Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread #316 Stainless Steel Specifications: Mat...

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Original price $64.00
Original price $64.00 - Original price $64.00
Original price $64.00
Current price $44.99
$44.99 - $44.99
Current price $44.99
Save $19.01 Save $0.00
Original price $90.00
Original price $90.00 - Original price $90.00
Original price $90.00
Current price $62.99
$62.99 - $62.99
Current price $62.99

GROCO 1-1/2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1500-W]

GROCO
In stock

1-1/2" Bronze Extra Long Thru-Hull Fitting w/Nut Features: Extra long NPSM / NPT combination thread C83600 Bronze Specifications: Hose Size: 1-1/...

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Original price $90.00
Original price $90.00 - Original price $90.00
Original price $90.00
Current price $62.99
$62.99 - $62.99
Current price $62.99
Save $27.01 Save $0.00
Original price $34.00
Original price $34.00 - Original price $34.00
Original price $34.00
Current price $23.99
$23.99 - $23.99
Current price $23.99

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

GROCO
In stock

Stainless Steel Hose Barb Thru-Hull Fitting - 5/8" Features: NPS Thread With Hose Connection #316 Stainless Steel UL Listed 647B Specifications: ...

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Original price $34.00
Original price $34.00 - Original price $34.00
Original price $34.00
Current price $23.99
$23.99 - $23.99
Current price $23.99
Save $10.01 Save $0.00
Original price $7.57
Original price $7.57 - Original price $7.57
Original price $7.57
Current price $3.99
$3.99 - $3.99
Current price $3.99

Perko 1/2" Thru-Hull Fitting f/ Hose Plastic MADE IN THE USA [0328DP4]

Perko
In stock

Perko 1/2" Thru-Hull Fitting f/ Hose Plastic Molded White Plastic Broad FlangeTechnical Information: Hose Size Inches: 1/2 Mounting Hole Diamete...

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Original price $7.57
Original price $7.57 - Original price $7.57
Original price $7.57
Current price $3.99
$3.99 - $3.99
Current price $3.99
Save $3.58 Save $0.00

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