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 49 - 72 of 544 products

Sea-Dog Sea-Dog T-Handle Drain PlugSKU: 542463-Bulk

From $5.75

Midland Metal Mfg. Co. Midland Metal Nylon Union ElbowSKU: 554676-1/4"

From $1.29

Midland Metal Mfg. Co. Midland Industries Nylon Elbow Fitting, Hose Barb x MIP (NPT) ThreadedSKU: 554675-1"x1"

From $1.35

Forespar Products Corp. Forespar Marelon Tailpipes/Hose ConnectorsSKU: 531579-1/2"-5/8"

From $4.95

Forespar Products Corp. Forespar HECF Marelon Elbows Female NPT to Hose Barb, 90 Deg.SKU: 531576-1/2"

From $4.15

Rule Industries Port Fitting - 3/4" 90° Hose Barb, 1201RSKU: 563226

$17.38

Shurflo Elbow Swivel Fitting, 1⁄2" Female NPT Wing Nut to 5⁄8" BarbSKU: 264951

$3.95

Sea-Dog Sea-Dog, Cast 316 Stainless Steel Exhaust Thru-HullsSKU: 532692-2-1/2"

$121.31

Forespar Products Corp. Forespar 250 Series Flush Head Marelon Thru HullSKU: 549433-1/2"

From $16.25

Groco Groco, Bronze Thru-Hull Scoop Strainers, STH SeriesSKU: 531638-1/2"

From $31.50

Groco Groco, Straight Stainless Steel Thru-Hull Fittings, HTH-xxx-S SeriesSKU: 531619-1/2"-1/2"

From $28.95

Buck Algonquin / Hydrasearch Buck Algonquin Bronze Scoop Strainers, Surface MountSKU: 531448-4"

From $57.32

On Sale

Rule Industries Rule 90° Elbow AdaptersSKU: 543418-1-1/8to1

From $13.60 $14.75

Forespar Products Corp. Forespar Marelon MF 850 Ball ValvesSKU: 531580-1/2"

From $47.95

Whale Water Systems Shut-Off Valve - Plastic BodySKU: 100764

$27.99

The Bosworth Co. Bosworth "Easy-Turning" Base Mount Y-ValveSKU: 536131

$83.99

Whale Water Systems Stem TeeSKU: 84205

$7.14

Whale Water Systems WPYP611 Pipe YSKU: 44115

$13.68

Midland Metal Mfg. Co. Midland Metal Nylon PlugsSKU: 554647-3/8"

From $0.85

Perko Perko Garboard Drain Plug, Cast Bronze, 3/4"SKU: 51793

$126.99

Groco Pipe Nipple 3/4" Cast BronzeSKU: 541221

$10.50

Forespar Sta Plug for Boat Leak Emergencies

Forespar Products Corp. Forespar Sta-Plug Soft Emergency PlugSKU: 529586

$29.33

Perko Perko Bronze Pipe to Hose AdapterSKU: 543487-3/4"

From $14.22

Midland Metal Mfg. Co. Midland Metal Nylon Tee Plastic FittingSKU: 554678-1/8"

From $1.35

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