same day shipping clock icon
free shipping box icon
price tag icon

Thru Hull Fittings & Strainers

      • T&H Marine Thru-Hull Fittings Straight White
        List Price: $4.42
        Starting At: $3.85

        T-H Marine Thru-Hull Fittings Straight White All T-H Marine Thru-Hull Fittings are made of the highest quality virgin polypropylene to ensure durability and attractive appearance. Polypropylene is UV stabilized to provide longevity. Available in...

        Choose Options
      • TH Marine Duckbill Overboard Drain Scupper
        List Price: $13.73
        Starting At: $11.95

        T-H Marine Duckbill Overboard Drain Scupper Tough Thermoplastic Flapper Seals Tight Under Water Pressure Easy to Install Over Drain Tubes Outer Ring is 2-3/4" in Diameter Color: Black/White

        Add to Cart
      • Attwood Marine Scupper Valve
        List Price: $11.57
        Now: $9.83

        Attwood Marine Scupper Valve Provides a water exit for boats with self-bailing cockpits. Acetal construction. Accommodates 3875B thru-transom thru-hull connector (screw holes must be drilled for installation.) Diameter: 2-7/8". Use as a replacement...

        Add to Cart
      • Groco Pipe To Hose Bronze Fitting
        List Price: $7.64
        Starting At: $5.19

        Groco Pipe to Hose Bronze Fitting Groco bronze Pipe to hose fitting. Standard Flow - the hose ID is the same as the pipe size (ie: PTH-750 has 3/4" NPT pipe thread and accepts 3/4" ID hose). Sizes from 1/2" to 5" UL Listed...

        Choose Options
      • TH Marine Thru-Hull Fitting, 3-4" 90 Degree - White
        List Price: $5.48
        Now: $4.77

        3/4" High quality UV and chemical resistant virgin polypropylene fitting, for 3/4" hose I.D. Flange diameter: 1 1/2" Total Overall Length: 2 1/2" Total threaded portion: 1" Hose I.D.: 3/4" Installation hole diameter: 1"

        Add to Cart
      • Groco Bronze Thru Hull With Nut
        List Price: $21.36
        Starting At: $12.39

        Groco Bronze Thru Hull with Nut Lengths shown are of the threaded portion only

        Choose Options
      • Attwood Marine Plastic Thru-Hull Fittings
        Starting At: $8.23

        Attwood Marine Thermoplastic Resin Thru-Hull Fitting These thru-hulls are made with a durable, thermoplastic construction which prevents electrolysis. Caution: Thru-Hull connectors are designed for installation above the water line only.

        Choose Options
      • Groco 90° Bronze Elbow Pipe To Hose
        List Price: $10.95
        Starting At: $7.44

        Groco 90 Degrees Bronze Elbow Pipe to Hose Bronze 90 degree standard flow elbow pipe to hose assorted sizes.

        Choose Options
      • Groco In-Line Ball Valve
        List Price: $37.49
        Starting At: $25.42

        Groco In-line Ball Valve Features: Patented selectable handle rotation Handle has square hole to accept standard ratchet 400 WOG rated Drain Plug Full pipe size flow Stainless steel ha

        Choose Options
      • TH Marine Flush Mount Scupper Adapter
        List Price: $10.62
        Now: $8.60

        These scupper valves are simply the best and most fool-proof of any flush mount scupper valve available. The flapper is molded of a flexible thermo-plastic that is totally impervious to the effects of sun and chemicals found in the marine environment...

        Add to Cart
      • T&H Marine  Inline Check Valve
        List Price: $21.83
        Starting At: $19.00

        A great solution to provide a scupper check valve in the drain line. Allows use of standard thru-hull fittings in the cockpit and on the hull exterior. Features: Hose Size: 3/4", 1-1/8", and 1-1/2" Double Barb Inline Scupper- Black Prevents...

        Choose Options
      • Groco Bronze Pipe Nipple
        List Price: $9.88
        Starting At: $6.52

        Groco Bronze Pipe Nipple PN Series cast bronze pipe nipples provide exact alloy compatibility for making inter-connections between numerous marine components such as seacocks, strainers, and check values. Features: Cast-in wrench flat simp

        Choose Options
      • T-H Marine 90 Degree Elbow Fitting
        List Price: $5.56
        Starting At: $4.84

        T-H Marine barbed elbow fittings are molded specifically to fit marine hose dimensions. A barbed elbow fitting allows you to make a 90 degree turn in hose routing without kinking hose. They can also be used as a hose junction for hose repair. Our...

        Choose Options
      • T&H Marine  3 Way "Y" Fitting
        List Price:
        Starting At: $9.48

        T-H Marine barbed wye fittings (Y fittings) are molded specifically to fit marine hose dimensions. A fitting with three openings, a wye is used to create branch lines. It is a type of tee fitting which has the side inlet pipe entering at a 45° angle, or...

        Choose Options
      • Attwood Straight Barbed Thru-Hull Boat Fittings
        List Price: $27.82
        Starting At: $23.64

        Attwood Stainless Steel Straight BarbedThru - Hull Fittings Polish your image with these beautiful, durable stainless steel fittings.  Why specify plastic parts when these fittings will last the life of the boat.  Caution:  Stainless thru...

        Choose Options
      • Groco Hi-Speed Strainer With Nut
        List Price: $41.99
        Starting At: $28.32

        Groco Hi-Speed Strainer with Nut Bronze Hi-speed strainer with nut assorted sizes.

        Choose Options
      • T&H Marine  Plumbing Fittings 3-Way Tee
        List Price: $1.58
        Starting At: $1.38

        T-H Marine barbed tee fittings are molded specifically to fit marine hose dimensions. Standard tees all have the same barb dimension for each leg of the tee. Resists UV & Chemicals 3-Way Barb

        Choose Options
      • Groco Seacock Backing Block
        List Price: $56.60
        Starting At: $45.93

        Groco Seacock Backing Block Flanged seacock installation is improved with the use of a backing block between the valve flange and the hull. Each size fits multiple seacock sizes Press threaded inserts into the hull side of the backing block into the...

        Choose Options

      Marine Thru Hull Fittings and Strainers

      Scoop strainers are designed to prevent debris from entering and clogging your cooling system, while marine thru hull fittings connect plumbing or fuel hoses from the interior to the exterior. These may not be expensive boat parts, but they are very important. That’s because thru hull fittings/strainers ensure that water does not breach your boat’s infrastructure. Many a craft has been scuttled for lack of a water-tight fitting, so be sure to maintain your boat’s fittings and strainers with reliable replacement parts from Wholesale Marine.

      Wholesale Marine carries thru hull fittings and strainers by Attwood, Garmin, >Groco, Johnson Pump, Shurflo, T&H Marine, and Whale Marine. For years of efficient service, we recommend Groco’s Tri-Flanged Ball-Type Seacock. It features a patented field reversible handle with a choice of closed position options, and will accept standard ratchets.

      For Great Prices and Selection, Shop Wholesale Marine!

      T&H Marine’s Inline Check Valve is available in three sizes to accommodate the most common standard cockpit and hull exterior fittings. This inline scupper was designed for use above the waterline, while Attwood’s Stainless Steel Straight Barbed Thru-Hull Fitting is also available in three sizes, and designed for a long service life!

      Wholesale Marine carries everything our customers need for their boating life at very competitive prices. This includes marine thru-hull fittings and strainers.So, if you have a question about our product selection, or wish to place an order, just call us Monday through Friday, from 9:00 AM until 6:00 PM, EST, at (877) 388-2628. Most orders ship the same day, for a flat rate. Be sure to ask about our Captain’s Club Rewards program for additional discounts the next time you shop with us.