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Anti-Siphon valve 30 in. ----what does 30 in mean

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  • #16
    Originally posted by AllDodge View Post
    Google fact checkers...lol

    HE 30 is a long obsolete (1980’s) British standard designation for a 6082 aluminum alloy. Thus the reference from a website in Mumbai, India.

    Here is the list of International alloy designations and chemical compositions of aluminum alloys.

    Aluminum alloys....Four (4) digits with three (3) digit temper designations....ie 5052-H32

    https://www.aluminum.org/sites/defau...l%20Sheets.pdf
    ....

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    • #17
      just for clarification please see picture of 30 stamped on body of the anti-siphon valve, also, I ran across this:

      https://www.uscgboating.org/assets/1...YC.1002.01.pdf
      Bring rain gear !

      Comment


      • #18
        I think I found the correct answer ,,, now I feel really bad because it came from another forum ,,,,,The correct answer is:

        For the 30" label/spec of an ASV, that is the maximum height of the fuel level in the tank to the lowest part of the fuel system and is usually referenced as the "head". In other words, the valve will seal against a leak up to 30 inches below the top of the fuel level.


        Thanks to all; because any input is food for thought and greatly appreciated
        Bring rain gear !

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        • #19
          ??----Post # 6 here ????

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          • #20
            88fas014-6
            Bring rain gear !

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            • #21
              Originally posted by Prophammer View Post
              I think I found the correct answer ,,, now I feel really bad because it came from another forum ,,,,,The correct answer is:

              88fas014-6
              Thanks for looking it up, which paragraph in the spec is this listed?
              94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
              95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
              07 Seadoo GTX
              Merc Adults Only VP Adults Only
              G-Dad always said "First Liar doesn't stand a chance"

              Comment


              • #22
                Originally posted by Prophammer View Post
                The correct answer is:

                For the 30" label/spec of an ASV, that is the maximum height of the fuel level in the tank to the lowest part of the fuel system and is usually referenced as the "head". In other words, the valve will seal against a leak up to 30 inches below the top of the fuel level.
                I now know this correct because West Marine gives this spec, last paragraph of their; fuel barb, P/H anti-siphon 1/4NPT,

                the spec quoted corresponds to West Marines spec:

                Specifications
                • Hose: 3/8"
                • Thread Size: 1/4" NPT
                • Head: 30"

                Bring rain gear !

                Comment


                • #23
                  the spec quoted corresponds to West Marines spec:
                  What spec?
                  94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                  95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                  07 Seadoo GTX
                  Merc Adults Only VP Adults Only
                  G-Dad always said "First Liar doesn't stand a chance"

                  Comment


                  • #24
                    I understand it as this;

                    West Marine anti-siphon model # 13854898
                    Specifications
                    • Hose: 3/8"
                    • Thread Size: 1/4" NPT
                    • Head: 30"
                    30" Head = the top level of the tank measured to the lowest part of the fuel in the tank is referenced as the "head"

                    My pick-up tube is 22 inches so I think I'm in the clear
                    Bring rain gear !

                    Comment


                    • #25
                      I understand what you typed

                      I'm asking where is it written in the spec?
                      94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                      95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                      07 Seadoo GTX
                      Merc Adults Only VP Adults Only
                      G-Dad always said "First Liar doesn't stand a chance"

                      Comment


                      • #26
                        A whole lot of words for a part that is not required to be used on any outboard motor powered boat. Or which may not be needed on a lot of inboard powered boats.

                        Comment


                        • #27
                          Or which may not be needed on a lot of inboard powered boats.
                          It is the law that an ASV or electrically operated stop valve is used on inboard motors with permanently mounted fuel tank page 93 thru 96

                          https://www.uscgboating.org/assets/1...YC.1002.01.pdf
                          94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                          95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                          07 Seadoo GTX
                          Merc Adults Only VP Adults Only
                          G-Dad always said "First Liar doesn't stand a chance"

                          Comment


                          • #28
                            Originally posted by AllDodge View Post

                            It is the law that an ASV or electrically operated stop valve is used on inboard motors with permanently mounted fuel tank page 93 thru 96

                            https://www.uscgboating.org/assets/1...YC.1002.01.pdf
                            The way I read Figure 34 on Page 95, there is a case when an ASV or electrically operated stop valve is not required.

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                            • #29
                              My fuel line dips below the lowest level of the fuel tank before rising up to the engine inlet (it actually goes through a spin-on filter first, then to the engine) so,, because of this I'm supposed to have an anti-siphon device, this discussion is getting fun , thanks guys
                              Bring rain gear !

                              Comment


                              • #30
                                Sign up today
                                So we all been flapping our gums stating our opinions. There is no written word/spec to the 30 in, just more opinions.

                                Agree, its getting funny, but in a sad way for those looking for documentation
                                94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                                95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                                07 Seadoo GTX
                                Merc Adults Only VP Adults Only
                                G-Dad always said "First Liar doesn't stand a chance"

                                Comment

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