Thru Hull Boat Fittings

56 Items | 2 of 2 pages
 1 2
Perko Thru Hull Connection For Pipe
    Features:Cast Bronze Flange is machined to fit hull and grooved to retain bedding compound. Neck is threaded approx. 3/8" from flange.
    List price: $30.99
    Starting at:
    $20.60
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    Whale Equal Straight Adapter
      15mm Equal Straight Adapter
      List price: $0.75
      Starting at:
      $0.62
      (3)
      In stock
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        White nylon. FDA approved.
        List price: $0.99
        Starting at:
        $0.67
        In stock
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          Molded white plastic with narrow flange. For use with hose.
          List price: $6.29
          Starting at:
          $6.27
          In stock
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          T-H Marine Thru Hull Fittings
            High Quality UV and Chemical Resistant Virgin Polypro, Color: Black Stud Sized to fit all Marine hose 90 degree features finished head and pass …
            List price: $6.89
            Starting at:
            $5.47
            (1)
            In stock
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            Apollo Thru-Hull Connections For Pipe
              Features:Cast bronze with machine finish. Deep caulk area for watertight seal.
              List price: $17.89
              Starting at:
              $13.29
              (1)
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                Includes locknut.
                Starting at:
                $35.20
                In stock
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                  Cast from #316 stainless steel. A channel under the flange holds a bead of sealant. All models have wrench flats or an end notch. Designed for …
                  List price: $20.39
                  Starting at:
                  $15.89
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                  Thru Hull Connectors
                    Molded of rugged plastic. Will not rust, corrode, discolor or contribute to electrolysis. Design eliminates hull streaking and allows …
                    List price: $4.79
                    Starting at:
                    $3.76
                    (2)
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                      Includes locknut. Stainless Steel.
                      List price: $27.00
                      Starting at:
                      $21.60
                      In stock
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                        Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut has bonding connection. NOT TO BE USED IN …
                        List price: $28.00
                        Starting at:
                        $22.40
                        In stock
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                          316 Stainless steel.
                          List price: $43.59
                          Starting at:
                          $34.74
                          In stock
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                          Perko Thru Hulls For Hose
                            Available in plain or chrome plated bronze, these fittings have a hose barb connection and are recommended for use above the waterline only. The …
                            List price: $43.49
                            Starting at:
                            $25.95
                            (3)
                            In stock
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                            Forespar Products
                              Forespar® series of the Thru-Hull Connectors are precision molded in high strength Marelon®. Their great strength, light weight and complete …
                              List price: $14.19
                              Starting at:
                              $11.40
                              (1)
                              In stock
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                                Cast bronze with nut. Made in U.S.A. NOT TO BE USED IN POTABLE WATER SYSTEMS.
                                List price: $53.89
                                Starting at:
                                $27.92
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                                  Injection molded polypropylene. Made in USA.
                                  List price: $3.10
                                  Starting at:
                                  $2.38
                                  In stock
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                                    High quality UV and chemical resistant virgin polypropelene. Features a finished head and a single pass around nut.
                                    List price: $4.79
                                    Starting at:
                                    $3.80
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                                      Cast bronze. Similar to 322 series except neck is threaded to between 1 and 1-1/2" from flange.
                                      List price: $99.99
                                      Starting at:
                                      $47.70
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                                        Injection molded acetel. Made in USA.
                                        List price: $8.95
                                        Your price:
                                        $6.87
                                        In stock
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                                          Fittings are molded of tough acetal resin so they will not rust, corrode, discolor nor are they susceptible to electrolysis. White. Skin pack. …
                                          List price: $9.19
                                          Your price:
                                          $7.32
                                          In stock
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                                          Forespar 253 Series
                                            253 Series - Hose Tailpipe/Mushroom HeadForespar® series of the Thru-Hull Connectors are precision molded in high strength Marelon®. Their …
                                            List price: $16.09
                                            Starting at:
                                            $13.11
                                            In stock
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                                              White.
                                              List price: $3.69
                                              Starting at:
                                              $2.92
                                              In stock
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                                              Todd Holding Tankpipe-To-Hose Adapter Kits
                                                All necessary fittings are included to attach hOuter Diameterng tanks to the appropriate hoses. All fittings screw into tanks. Opposite Type of End …
                                                List price: $23.19
                                                Starting at:
                                                $18.49
                                                In stock
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                                                  Has locknut with bonding screw. Comes with nut. Bronze. NOT TO BE USED IN POTABLE WATER SYSTEMS.
                                                  List price: $36.00
                                                  Starting at:
                                                  $28.80
                                                  In stock
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                                                  56 Items | 2 of 2 pages
                                                   1 2
                                                  T-H Marine Supply
                                                   
                                                  Whale Water Systems
                                                   
                                                  Perko
                                                   
                                                  Seachoice
                                                  Attwood
                                                   
                                                  Groco
                                                   
                                                  Seadog Line
                                                   
                                                  Marpac
                                                  Whitecap
                                                   
                                                  Apollo Valves
                                                   
                                                  Buck Algonquin
                                                   
                                                  Seasense
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                                                  Thru Hull Straight Fitting, 3/4" - Sease …
                                                  Only $2.19
                                                  Save:$0.50 (18% Off)
                                                  Thru Hull Straight Fitting, 3/4" - Sease …
                                                   
                                                  90 degree Thru Hull Connector, 1-1/8", W …
                                                  Only $3.24
                                                  Save:$0.95 (22% Off)
                                                  90 degree Thru Hull Connector, 1-1/8", W …
                                                   
                                                  Thru-Hull Connector, 1/2" Hose, Whit …
                                                  Only $3.21
                                                  Save:$0.44 (12% Off)
                                                  Thru-Hull Connector, 1/2" Hose, Whit …
                                                   
                                                  3/4" White Thru Hull Connector, 1-1/4&qu …
                                                  Only $2.92
                                                  Save:$1.27 (30% Off)
                                                  3/4" White Thru Hull Connector, 1-1/4&qu …
                                                  90 degree Thru Hull Connector, 3/4", Whi …
                                                  Only $3.07
                                                  Save:$0.92 (23% Off)
                                                  90 degree Thru Hull Connector, 3/4", Whi …
                                                   
                                                  Thru Hull Connector, 3/4", White, 1-1/4& …
                                                  Only $4.25
                                                  Save:$1.04 (19% Off)
                                                  Thru Hull Connector, 3/4", White, 1-1/4& …
                                                   
                                                  9-0328dp4a - Perko
                                                  Only $3.83
                                                  Save:$1.56 (28% Off)
                                                  9-0328dp4a - Perko
                                                   
                                                  Thru Hull Fitting, 3/4&Quot;, 19mm - Rule
                                                  Only $6.99
                                                  Save:$3.50 (33% Off)
                                                  Thru Hull Fitting, 3/4&Quot;, 19mm - Rule
                                                  9-0328dp6 - Perko
                                                  Only $5.18
                                                  Save:$1.41 (21% Off)
                                                  9-0328dp6 - Perko
                                                   
                                                  Thru-Hull Connector, 3/4" Hose, Blac …
                                                  Only $3.28
                                                  Save:$0.67 (16% Off)
                                                  Thru-Hull Connector, 3/4" Hose, Blac …
                                                   
                                                  Thru Hull 5/8in - T-H Marine Supply
                                                  Only $2.93
                                                  Save:$0.76 (20% Off)
                                                  Thru Hull 5/8in - T-H Marine Supply
                                                   
                                                  Overflow Drain Tube Threaded - T-H Marine Sup …
                                                  Only $11.38
                                                  Save:$2.91 (20% Off)
                                                  Overflow Drain Tube Threaded - T-H Marine Sup …
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                                                  Boating Know How
                                                  Thru Hull Threads (Video)
                                                  A video demonstration on threads thru the hull presented by Forespar. ... read more



                                                  Video Transcript

                                                  And now for the exciting topic of threads on thru hulls.

                                                  On a marine thru hull- first of all a thru hull is just that. It is the fitting that goes through the hull and is secured or fastened on the inside with a nut or with a flanged valve called a seacock which replaces that nut.

                                                  It’s also important to note here that marine thru hulls all have parallel threads. No matter if they are US thread, BSB, or buttress- they are all parallel threaded. This is because no one ever knows the hull thickness that they are going to be installed on, so a taper would cause problems as the thru hull threads need to be cut to length for a given seacock installation or a valve installation.

                                                  This also means that the true marine seacocks or valves are also female parallel threaded to accept the thru hull. Non marine fittings and valves usually have NPT or nationally piped taper thread. This type is generally used in irrigation or house plumbing and should never be used below waterline. This is true of tail pipes and elbows on top of the valve as well. These connections must be sound and leak free. There is also more important information on threads on our website, forespar.com

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                                                  Why Marelon Plumbing Parts? (Video)
                                                  A video presentation on why Marelon plumbing parts are the best for your boat repairs ... read more



                                                  Video Transcript

                                                  Hi. I’m Wes Gary. I’ve built boats and I’ve been around sail and power boating for most my life. I’ve had my own plastics business for over 25 years and I’ve built a 55 foot slew. I know polymer composites very well.

                                                  I’m here today to talk about Forespars line of Marelon marine plumbing fittings. I know that Marelon is not just a plastic but an engineered carbon fiber and glass re-enforced composite polymer, ideally formulated for marine use. You go to your local boating supply store and you will notice that there are several plastic plumbing choices available. Marelon, however, is the only plastic to meet the rigorous marine UL test. Its also ISO certified and Marelon also meets the ABYC standards for above and below the waterline. These are the same tests that bronze or stainless steel parts have to pass too. I mention this because some of you may have seen Marelon fittings in stores and thought ot yourselves… ehhh… it’s a plastic and bronze has been the material of choice for boats in the past. Well think again.

                                                  What’s your boat made of? What about the hoses that are going to the valves? Well, if you accept those materials below the waterline, why not a valve that’s made from truly 21st century carbon fiber reinforced polymer composite.

                                                  There are other reasons as well. Marelon wil never corrode. Because it’s not made of anything metallic, it’s never subject to the cancer ravages of electrolysis. You don’t have to bond Marelon so you don’t have the additional copper bonding wires and you don’t’ have the additional potential corrosion of those as well, so all that goes away.

                                                  Marelon is also very lightweight. A typical bronze 1 1/2” seacock weighs about 10 pounds. A comparable Marelon 1 1/2” seacock weighs less than 2 pounds. Think about how more efficient you are going to be and how much more beer you can carry.

                                                  As you walk down the plumbing isle of your favorite marine hardware store, and you see the plastic stuff on the shelf, remember that all plastics are not created equal. Marelon is about as close as you can get to the material that your boat is made of in a precision melded, marine approved, polymer composite. It’s time to step out of the Bronze Age.

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