Marine Plumbing & Ventilation

83 products

  • Sale -15%Last stock! Attwood 500 GPH Shower Sump MK2 System  12V 51414

    Attwood Marine Attwood 500 GPH Shower Sump MK2 System - 12V [5141-4]

    4 in stock

    500 GPH Shower Sump MK2 System - 12VAttwood’s shower sump systems deliver the performance you’ve been asking for. Choose from standard or large box sizes. They offer fast water flow into and out of the sump. The lid snaps into place to allow quick installation (and removal for cleaning) and includes a gasket to seal the sump box against overflow. The sump box even includes an air vent to prevent airlocks. It meets or exceeds all applicable standards of the ABYC and USCG.Specifications: Amp Draw: 1.4 500 GPH Rated Voltage: 12V Fuse Size: 3A Outlet Hose Size: 3/4" I.D. Wire/Connector: 22" wire

    4 in stock

    $165.06 $140.99

  • Sale -15%Last stock! Attwood 800 GPH Shower Sump MK2 System  12V 51434

    Attwood Marine Attwood 800 GPH Shower Sump MK2 System - 12V [5143-4]

    1 in stock

    800 GPH Shower Sump MK2 System - 12VAttwood’s shower sump systems deliver the performance you’ve been asking for. Choose from standard or large box sizes. They offer fast water flow into and out of the sump. The lid snaps into place to allow quick installation (and removal for cleaning) and includes a gasket to seal the sump box against overflow. The sump box even includes an air vent to prevent airlocks. It meets or exceeds all applicable standards of the ABYC and USCG.Specifications: 800 GPH Amp Draw: 2.5 Rated Voltage: 12V Fuse Size: 5A Outlet Hose Size: 3/4" I.D. Wire/Connector: 22" wire

    1 in stock

    $180.97 $152.99

  • Attwood Service Kit fS500  S800 Bilge Pumps AK55057

    Attwood Marine Attwood Service Kit f/S500 S800 Bilge Pumps [AK5505-7]

    10 in stock

    Service Kit for S500 & S800 Bilge PumpsSpecifications: Outlet Diameter: 3/4" (19mm) & 1" (25mm) Compatible with Tsunami Bilge Mk2 Kit Includes (1 each): 90-degree outlet Straight outlet Washer Non-return/check valve WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

    10 in stock

    $17.34

  • Attwood Service Kit fS1200 Bilge Pumps AK55127

    Attwood Marine Attwood Service Kit f/S1200 Bilge Pumps [AK5512-7]

    11 in stock

    Service Kit for S1200 Bilge PumpsSpecifications: Outlet Diameter: 1" (25mm) & 1-1/8" (28mm) Compatible with Tsunami Bilge Mk2 Kit includes (1 each): 90-degree outlet Straight outlet Washer Non-return/check valve WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

    11 in stock

    $17.88

  • Sale -15% Attwood Tsunami Mk2 T1200 Aerator  12V  90Degree Inlet 56644

    Attwood Marine Attwood Tsunami Mk2 T1200 Aerator - 12V - 90-Degree Inlet [5664-4]

    10 in stock

    Tsunami Mk2 T1200 Aerator - 12V - 90-Degree InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 3-1/2" x 1-1/8" thru-hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 1200 Specifications: Gallons Per Hour: 1200 Inlet Style: Angled Volts: 12v Box Dimensions: 4"H x 8"W x 9"L WT: 1.5 lbs UPC: 022697025456

    10 in stock

    $74.40 $62.99

  • Sale -9% Attwood Tsunami Mk2 T1200 Aerator  12V  1 NPT Inlet 56634

    Attwood Marine Attwood Tsunami Mk2 T1200 Aerator - 12V - 1" NPT Inlet [5663-4]

    13 in stock

    Tsunami Mk2 T1200 Aerator - 12V - 1" NPT InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 7/8" x 1" seacock Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 1200 Specifications: Gallons Per Hour: 1200 Volts: 12v Box Dimensions: 4"H x 5"W x 8"L WT: 1.2 lbs UPC: 022697025555

    13 in stock

    $70.15 $63.99

  • Sale -16% Attwood Tsunami Mk2 T800 Aerator 12V 34 NPT Inlet 56534

    Attwood Marine Attwood Tsunami Mk2 T800 Aerator 12V 3/4" NPT Inlet [5653-4]

    7 in stock

    Tsunami Mk2 T800 Aerator 12V 3/4" NPT InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 7/8 in. x 3/4 in. seacock Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 800 Specifications: Gallons Per Hour: 800 Volts: 12v Box Dimensions: 4"H x 5"W x 8"L WT: 1.15 lbs UPC: 022697025524

    7 in stock

    $59.52 $49.99

  • Sale -18% Attwood Tsunami Mk2 T800 Aerator  12V  Straight Inlet 56504

    Attwood Marine Attwood Tsunami Mk2 T800 Aerator - 12V - Straight Inlet [5650-4]

    Tsunami Mk2 T800 Aerator - 12V - Straight InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 3-1/2 in. x 3/4 in. thru-hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 800 Specifications: Gallons Per Hour: 800 Inlet Style: Straight Volts: 12v Box Dimensions: 4"H x 5"W x 8"L WT: 1.2 lbs UPC: 022697025500

    $59.52 $48.99

  • Sale -14% Attwood Tsunami Mk2 T500 Aerator Kit 52534

    Attwood Marine Attwood Tsunami Mk2 T500 Aerator Kit [5253-4]

    17 in stock

    Tsunami Mk2 T500 Aerator KitThis aerator kit is recommended for fishing boats with built-in livewells that are not equipped with a thru-hull recirculation system. The pump is sealed and can be occasionally submerged; however, the electrical wires must never be submerged.Kit Includes: Aerator spray head SS wire mesh strainer  Pump Straight outlet fitting  Hose  Two hose clamps Specifications: Pump Model: T500 Flow Gal/HR: 500 Amp Fuse: 3 Outlet Hose Inner Diameter: 3/4” (19mm) Two hose clamps Specifications: Gallons Per Hour: 500 Outlet Size: 3/4" Volts: 13.6v Box Dimensions: 5"H x 7"W x 9"L WT: 1.15 lbs UPC: 022697026019

    17 in stock

    $74.82 $63.99

  • Sale -12% Attwood Tsunami Mk2 T500 Aerator  12V  34 NPT Inlet 56434

    Attwood Marine Attwood Tsunami Mk2 T500 Aerator - 12V - 3/4" NPT Inlet [5643-4]

    8 in stock

    Tsunami Mk2 T500 Aerator - 12V - 3/4" NPT InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 7/8 in. x 3/4 in. seacock Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 500 Specifications: Gallons Per Hour: 500 Volts: 12v Box Dimensions: 4"H x 5"W x 8"L WT: 0.8 lbs UPC: 022697025494

    8 in stock

    $48.89 $42.99

  • Sale -14% Attwood Tsunami Mk2 T1200 Aerator  12V  Straight Inlet 56604

    Attwood Marine Attwood Tsunami Mk2 T1200 Aerator - 12V - Straight Inlet [5660-4]

    11 in stock

    Tsunami Mk2 T1200 Aerator - 12V - Straight InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 3-1/2" x 1-1/8" thru-hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 1200 Specifications: Gallons Per Hour: 1200 Inlet Style: Straight Volts: 12v Box Dimensions: 4"H x 5"W x 8"L WT: 1.25 lbs UPC: 022697025531

    11 in stock

    $70.15 $59.99

  • Sale -15% Attwood Tsunami Mk2 T800 Aerator  12V  90Degree Inlet 56544

    Attwood Marine Attwood Tsunami Mk2 T800 Aerator - 12V - 90-Degree Inlet [5654-4]

    7 in stock

    Tsunami Mk2 T800 Aerator - 12V - 90-Degree InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 3-1/2" x 3/4" thru-hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 800 Specifications: Gallons Per Hour: 800 Inlet Style: Angled Volts: 12v Box Dimensions: 4"H x 8"W x 9"L WT: 1.5 lbs UPC: 022697025449

    7 in stock

    $63.77 $53.99

  • Sale -15% Attwood Tsunami Mk2 T500 Aerator  12V  90Degree Inlet 56444

    Attwood Marine Attwood Tsunami Mk2 T500 Aerator - 12V - 90-Degree Inlet [5644-4]

    7 in stock

    Tsunami Mk2 T500 Aerator - 12V - 90-Degree InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 3-1/2 in. x 3/4 in. thru-hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 500 Specifications: Gallons Per Hour: 500 Inlet Style: Angled Volts: 12v Box Dimensions: 4"H x 8"W x 9"L WT: 1.1 lbs UPC: 022697025432

    7 in stock

    $53.14 $44.99

  • Sale -18% Attwood Tsunami Mk2 T500 Aerator  12V  Straight Inlet 56404

    Attwood Marine Attwood Tsunami Mk2 T500 Aerator - 12V - Straight Inlet [5640-4]

    Tsunami Mk2 T500 Aerator - 12V - Straight InletKeep bait and fish alive with the Tsunami Aerator Mk2. Attwood’s leading fish-friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range.Features: 3-1/2 in. x 3/4 in. thru-hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation with no sealant or tools is required Specifications:Flow Gallon/Hour: 500 Specifications: Gallons Per Hour: 500 Inlet Style: Straight Volts: 12v Box Dimensions: 4"H x 5"W x 8"L WT: 0.85 lbs UPC: 022697025470

    $48.89 $39.99

  • Sale -12% TH Marine Washdown Valve wChrome Base WDV1CPDP

    T-H Marine Supplies T-H Marine Washdown Valve w/Chrome Base [WDV-1CP-DP]

    18 in stock

    Washdown Valve with Chrome BaseA bulkhead-mounted washdown fitting that is inexpensive, functional, easy to install, and rust-proof. This injection-molded, chrome-plated ABS fitting is 2 1/4" in diameter and mounts in a 1 1/4" diameter hole with 3 countersunk screws. Features: A barbed hose fitting connects 3/4 in. inside-diameter tubing Standard hose threads with a protective cap that has a retaining strap are standard Chrome-plated ABS flange Injection-molded, UV-stabilized, and rust-proof Standard garden hose thread outlet The inlet fits 3/4 in. marine hose Protective cap with retainer The flange dimension is 2-1/4 in. OD Installation in a 1-1/4" hole Straight fitting with shutoff valve

    18 in stock

    $46.76 $40.99

  • Sale -8%Last stock! TH Marine Large Rectangular Scupper  White LRS2DP

    T-H Marine Supplies T-H Marine Large Rectangular Scupper - White [LRS-2-DP]

    1 in stock

    Large Rectangular Scupper - WhiteThis large rectangular scupper is made for quickly draining decks above the waterline. Features: Can quickly drain decks Made for decks above the waterline Max. drainage for larger boats Easily clears debris Fits a 2 in. x 5-1/2 in. opening

    1 in stock

    $17.35 $15.99

  • Sale -9% Attwood Tsunami MK2 T500 Manual Bilge Pump wInstallation Kit  500 GPH  12V 56147

    Attwood Marine Attwood Tsunami MK2 T500 Manual Bilge Pump w/Installation Kit - 500 GPH 12V [5614-7]

    6 in stock

    Tsunami MK2 T500 Manual Bilge Pump with Installation Kit - 500 GPH & 12VThis is a complete kit (includes a bilge pump) to install a manual bilge pump with a 3/4" I.D. hose outlet. The Tsunami Mk2 is the only manual bilge pump that eliminates airlocks. This is done by the Patented X-Air™ Impeller, which ejects trapped air in the pump and pipework. Also, the Tsunami Mk2 is the most reliable manual bilge pump in freshwater applications, considering it has 40% better protection against water ingress and electrolysis vs. the Mk1 pump. Kit Includes: Attwood Tsunami Mk2 500 GPH Pump Washer / Non-Return Valve 90-degree Outlet Straight Outlet 3/4" x 5' Pump Hose 3/4" Thru-hull fitting 2-way on/off switch with bezel plate Snap-It hose clamps Wire Kit Installation Kit Easy Installation & Service: GPH (Gallons Per Hour): 500 GPH 90° rotatable elbow outlet allows users to install the pump anywhere in a full 360° orientation Backward compatible hole pattern and motor cartridges of Tsunami Mk1 bilge and aerator pumps External mounting feet and integrated outlets reduce time and effort Service pump cartridges from hard-to-reach areas using only one hand Specifications: Rated Volts DC: 12VDC Fuse Size: 3 AMP Wire Length: (inch) 29" / (mm) 735mm Hose Diameter: (inch) 3/4" and 1" *Caution: Bilge pump switches are not external ignition protected Specifications: Gallons Per Hour: 500 GPH Operation: Non-Automatic Outlet Size: 3/4" or 1" Type: Pumps/Drives Volts: 12v Box Dimensions: 6"H x 7"W x 9"L WT: 1.75 lbs UPC: 022697024213 Quick Guide (pdf)

    6 in stock

    $74.99 $67.99

  • Sale -15% Attwood Gear Lube Pump 11891D7

    Attwood Marine Attwood Gear Lube Pump [11891D7]

    Gear Lube PumpThis Attwood Gear Lube Pump offers a universal fit so it can be used with the greatest number of engines. This pump is intended for use with a 32-ounce gear lube bottle, and it fits nearly any outboard or sterndrive. It comes with 1 Yamaha adapter.Features: Fits nearly any outboard or sterndrive Easy to install Quick Guide (pdf)

    $10.59 $8.99

  • Sale -18%Last stock! Attwood Kayak Hand Bilge Pump 115952

    Attwood Marine Attwood Kayak Hand Bilge Pump [11595-2]

    4 in stock

    Kayak Hand Bilge Pump This Attwood Hand-Operated Bilge Pump quickly and safely removes unwanted water and other liquids from small craft such as kayaks, canoes, and small fishing boats. This pump can remove up to 8 gallons per minute, and no hose is required. The pump is an 18-inch-long pump and has an ergonomic hand grip that keeps the pump afloat if dropped into the water.Features: Ideal for small craft such as kayaks, canoes, and small fishing boats (inch) 18" long Sturdy, impact-resistant, and lightweight plastic construction *No hose is required Specifications: Gallons Per Minute: 8 Operation: Non-Automatic Box Dimensions: 4"H x 4"W x 21"L WT: 3.7 lbs UPC: 022697115959

    4 in stock

    $32.99 $26.99

  • Sale -13% Attwood Stainless Steel ThruHull Standard Straight Barbed  1 Inner Diameter 665483

    Attwood Marine Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner Diameter [66548-3]

    13 in stock

    Stainless Steel Thru-Hull Standard Straight Barbed - 1" Inner DiameterPolish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance All visible areas are polished to a mirror finish, then passivate each part for additional protection Thick steel sidewalls withstand continual stress and hose flexing Faster, Simpler Installation: Each Thru-Hull is available with a new silicone gasket A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull The barbed tail ends provide plenty of room to hold multiple clamps Stainless Steel Straight Thru-Hulls, BarbedStandard Thread model has a full-length thread for thick hulls and easy tighteningSpecifications: Hose size: (inch) 1" inner diameter Flange Diameter: (inch) 2-1/4" Thread O.D. (outside diameter): (inch) 1-3/8"  Thread Length: (inch) 2-1/4" Barb Length: (inch) 1-1/4" Total Length: (inch) 3-7/8" Install Hole Saw Size: (inch) 1-1/2"  Thread NPSM: (inch) 1" Max Hull Thickness: (inch) 1-3/4" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 1" Material: Stainless Steel Box Dimensions: 3"H x 4"W x 7"L WT: 0.8 lbs UPC: 022697665485 Quick Guide (pdf)

    13 in stock

    $35.42 $30.99

  • Attwood White Plastic 90 Degree ThruHull Connector  34 Inner Diameter 38773

    Attwood Marine Attwood White Plastic 90 Degree Thru-Hull Connector - 3/4" Inner Diameter [3877-3]

    10 in stock

    White Plastic 90 Degree Thru-Hull Connector - 3/4" Inner Diameter90° Thru-Hulls are ideal for tight installations, such as livewell overflow drains. The angled design also eliminates hose kinking.Specifications: Fits Hose Size: (inch) 3/4"inner diameter Max Hull Thickness: (inch) 1" Flange Diameter: (inch) 1-1/2" Installation Hole Size: (inch) 1" Drain Plug: (inch) 1/2" Color: White *Plastic Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 3/4" Material: Plastic Box Dimensions: 1"H x 2"W x 3"L WT: 0.2 lbs UPC: 022697387738 Quick Guide (pdf)

    10 in stock

    $9.99

  • Sale -7% Attwood Stainless Steel ThruHull Standard Straight Barbed  58 Inner Diameter 665463

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

    6 in stock

    Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner DiameterPolish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?Rugged Stainless Construction: Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance All visible areas are polished to a mirror finish, then passivate each part for additional protection Thick steel sidewalls withstand continual stress and hose flexing Faster, Simpler Installation: Each Thru-Hull is available with a new silicone gasket A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull The barbed tail ends provide plenty of room to hold multiple clamps Stainless Steel Straight Thru-Hulls, BarbedStandard Thread model has a full-length thread for thick hulls and easy tighteningSpecifications: Hose size: (inch) 5/8" inner diameter Flange Diameter: (inch) 1-7/8" Thread O.D. (outside diameter): (inch) 1"  Thread Length: (inch) 2" Barb Length: (inch) 1-1/4" Total Length: (inch) 3-3/4" Install Hole Saw Size: (inch) 1-1/8"  Thread NPSM: (inch) 3/4" Max Hull Thickness: (inch) 1-1/16" *Stainless Steel Thru-Hull Connectors are designed for installation above the water line only Specifications: Hose Size: 5/8" Material: Stainless Steel Box Dimensions: 2"H x 3"W x 6"L WT: 0.5 lbs UPC: 022697665461 Quick Guide (pdf)

    6 in stock

    $27.99 $25.99

  • Sale -13% Attwood THandle Brass Drain Plug  1 Diameter 7526A7

    Attwood Marine Attwood T-Handle Brass Drain Plug - 1" Diameter [7526A7]

    T-Handle Brass Drain Plug - 1" DiameterThe T-Handle Drain Plugs are simply operated by a clockwise and counterclockwise turn of the T-handle, which expands and releases the drain plug.Features: Handle: Brass For 1" diameter drains *Sold as an Individual Specifications: Construction: Brass Box Dimensions: 1"H x 2"W x 6"L WT: 0.1 lbs UPC: 022697752673 Quick Guide (pdf)

    $7.99 $6.99

  • Last stock! Attwood SnapHandle Stainless Steel Drain Plug  1 Diameter 7520A3

    Attwood Marine Attwood Snap-Handle Stainless Steel Drain Plug - 1" Diameter [7520A3]

    4 in stock

    Snap-Handle Stainless Steel Drain Plug - 1" DiameterA clockwise turn of the handle tightens the plug in its tube, and the handle flips down to lock.Features: Handle: Stainless Steel For 1" diameter drains *Sold as an Individual Specifications: Construction: Stainless Steel Box Dimensions: 1"H x 3"W x 7"L WT: 0.5 lbs UPC: 022697752079 Quick Guide (pdf)

    4 in stock

    $13.99


You have seen 24 out of 83 products

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