Marine Thru-Hulls & Seacocks: Bronze & Marelon

Plumbing Fittings & Valves

Plumbing fittings and valves connect hoses, control flow, and route fluids safely throughout your boat's systems. Shop marine-grade fittings and valves for reliable plumbing installations.

Barb Fittings and Tail Pieces (84)

Drain Plugs (58)

Plumbing Fittings (142)

Thread Couplings (105)

Thru Hulls (60)

Plumbing Valves (98)

Showing 1 - 24 of 544 products

Jabsco Jabsco 3/4" Hose Barb Straight Kit Fitting - 6 GPMSKU: 567375

$9.75

Groco Groco, NPT Bronze 90 Degree Pipe to Hose Fittings, PTHC SeriesSKU: 531633-1/2"

From $12.25

Groco Groco, Bronze Pipe to Hose Fitting, PTH SeriesSKU: 531639-1"x1"

From $7.25

Check Valve for Shower Drain Box, 1240R-CV<br>

Rule Industries Check Valve for Shower Drain Box, 1240R-CV
SKU: 563241

$10.72

Shurflo ShurFlo 244-3946 90 Degree Wingnut Fitting, 3/4"SKU: 241260

$5.13

Groco Groco, Bronze Thru Hulls with Nut, TH SeriesSKU: 531627-1/2"

From $20.50

Attwood Attwood Straight Thru-Hull ConnectionsSKU: 531343-3/4"-WHT

From $4.08

Buck Algonquin / Hydrasearch Thru Hull Installation Step Wrench, 1/2" to 1-1/2"SKU: 92485

$58.85

Midland Metal Mfg. Co. Midland Metal Nylon Barb Male Adapter Plastic FittingSKU: 554672-1"x1"

From $0.69

Midland Metal Mfg. Co. Midland Metal Mender/Splicer Hose Barb Brass FittingSKU: 554668-1/8"

From $1.65

Midland Metal Mfg. Co. Midland Metal Rigid Female Adapter Brass Hose BarbSKU: 554667-3/8"x1/8"

From $1.85

Groco Groco, Bronze Flush Thru Hull with Nut, FTH SeriesSKU: 531637-3/4"

From $23.50

The Bosworth Co. Bosworth Y-Valve MountSKU: 561505-Base Mount

$31.94

Forespar Products Corp. Forespar 907001 Transom Drain Plug OnlySKU: 253119

$14.50

Midland Metal Mfg. Co. Midland Metal Barstock Hose Barb 90° Elbow Brass FittingsSKU: 554666-1/4"X1/4"

From $2.75

Groco Groco, Bronze Pipe to Hose Adaptors, Full Flow, FF SeriesSKU: 531634-1"x1-1/8"

From $10.50

Jabsco Jabsco Straight 1/2" Hose Barb Quad Port KitSKU: 567376

$11.25

Rule Industries Rule Thru Hull FittingsSKU: 542701-5/8"-RTANGLE

From $13.90

Groco Groco, 316 Stainless Steel Thru Hull with Nut, TH SeriesSKU: 531611-1/2"

From $17.75

Groco Groco Bronze Ball Valve, IBV SeriesSKU: 531621-1/2"

From $32.95

Moeller Four Way Fuel Valve, Brass, 1/4" FNPT, 033304-10SKU: 241988

$52.95

Whale Water Systems Equal ElbowSKU: 84201

$5.13

Sea-Dog Sea-Dog, Bait Well / Livewell Tank Drain Plugs, Brass / NeopreneSKU: 532689-3/8"-Card

From $5.05

Sea-Dog Sea-Dog, Replacement Nylon Drain Plug, Replacement Plug Only, retail packageSKU: 232630

$4.25

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