Welcome Guest - Sign Up today
Welcome Guest - Sign Up today

Announcement

Collapse
No announcement yet.

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

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

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

    I just bought a new anti-siphon valve for my boat. The one I got is an Attwood 30 in. - it is 1/4 NPT with a 3/8 barb for the hose, what does 30 in mean ?
    Bring rain gear !

  • #2
    What is the attwood part number?
    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


    • #3
      Attwood part number on the packaging is 88FAS014-6 (30 is stamped on the part itself) what does the 30 mean?
      Bring rain gear !

      Comment


      • #4

        It means Attwood stamped "30" on the valve. Why does it have to mean anything to the consumer as long as it works?

        It could mean "Passed by Quality Control Inspector 30" and the the part is too small for all of that, so only "30" was used.
        BOAT SPECS | FORUM HELP | STARCRAFT FORUM | SHOP iBoats
        Please, no PM's (Private Messages) regarding boat/engine problems.
        That is what the forums are for.
        Only forum/moderator issues will be answered in PM's.

        Comment


        • #5
          Originally posted by Prophammer View Post
          Attwood part number on the packaging is 88FAS014-6 (30 is stamped on the part itself) what does the 30 mean?
          Took me a bit and you learned me something, so its a good day

          Anti-siphon valves are required by Federal Law and the USCG on all permanent fuel tank installation. Use 15 (Brass) calibrated for HP 200 & above and 30 (Aluminum) calibrated for HP below 200.
          The 30 is Type 30 aluminum and must be used for motors under 200 HP
          Aluminium He30 as a medium strength alloy with excellent corrosion resistance.
          Brass must be used for motors over 200 HP
          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


          • #6
            Does the 30 in.have to do with the strength of the spring ?-------Perhaps related to how high the valve can be before siphon action pull it open ?

            Comment


            • #7
              Then the inspector stamps the 30 or 15 so it does mean something to the consumer.

              You learned me something, AD.
              BOAT SPECS | FORUM HELP | STARCRAFT FORUM | SHOP iBoats
              Please, no PM's (Private Messages) regarding boat/engine problems.
              That is what the forums are for.
              Only forum/moderator issues will be answered in PM's.

              Comment


              • #8
                I don't think it means 30 inches of vacuum , 30 inches of vacuum is un-achievable on earth, I was thinking it might mean the length of of the pick-up tube , but I don't want to assume anything, thanks for all replies
                Bring rain gear !

                Comment


                • #9
                  See AD's post #6.
                  BOAT SPECS | FORUM HELP | STARCRAFT FORUM | SHOP iBoats
                  Please, no PM's (Private Messages) regarding boat/engine problems.
                  That is what the forums are for.
                  Only forum/moderator issues will be answered in PM's.

                  Comment


                  • #10
                    I hope it's not against the rules, I checked another forum and got this answer:

                    "" 30" of water is the pressure or vacuum needed to unseat the ball check valve.
                    The older Evinrude service manuals ilustrated an anti-siphon valve test consisting of 3' of clear tubing held vertically with the valve at the lower end. You added water slowly until the valve passed water through it. The column of water in the tubing should hold at around 28" of water and leak at around 29" if I remember right.""


                    It makes sense to me now , thank you all
                    __________________
                    Bring rain gear !

                    Comment


                    • #11
                      Originally posted by GA_Boater View Post
                      See AD's post #6.
                      How do I get to AD's post #6
                      Bring rain gear !

                      Comment


                      • #12
                        Originally posted by Prophammer View Post

                        How do I get to AD's post #6
                        Its post 5, and its type 30 aluminum

                        That is just what I got from the USCG spec, you might also be right, just need to do more research to prove out
                        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


                        • #13
                          hmm, type 30 aluminum , I learn something new everyday, I'm going to research that , yes
                          Bring rain gear !

                          Comment


                          • #14
                            Originally posted by Prophammer View Post
                            hmm, type 30 aluminum , I learn something new everyday, I'm going to research that , yes
                            No such things as number 30 aluminum

                            30” of water....equates to the amount of “friction” introduced in the system (suction side) to overcome / open the valve.

                            https://www.google.com/amp/s/cheguid...mp_sizing.html
                            ....

                            Comment


                            • #15
                              Sign up today
                              Originally posted by dingbat View Post

                              No such things as number 30 aluminum
                              ]
                              Ya don't say
                              Fact check on isle 3

                              http://mallinathmetal.com/aluminium-...suppliers.html
                              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

                              Working...
                              X