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Thread: tank valves

 

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    tank valves

    does anyone recomend a decent tank valve for genesis HP tank of course din thanks my local shop of course dont do din (but can order crap i can do that )
    so i am searching now.

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    Lemonade's Avatar
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    There is always wide variety for sale on eBay, used & new. Do a search on ]DIN Valve[
    "I know the human being and fish can coexist peacefully." -- George W. Bush

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    Quote Originally Posted by medic13
    does anyone recomend a decent tank valve for genesis HP tank of course din thanks my local shop of course dont do din (but can order crap i can do that )
    so i am searching now.
    I bought an isolator manifold and valves from Thermo. Cheaper then the other more name brands but the quality is good and parts are readily available.

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    Quote Originally Posted by medic13
    does anyone recomend a decent tank valve for genesis HP tank of course din thanks my local shop of course dont do din (but can order crap i can do that )
    so i am searching now.

    Be careful! Genesis steel HP tanks are not standard tank threads! IIRC they are 1/2 inch not 3/4 inch so you can't just use any valve out of the catalogue. They also take a different o-ring than other tank valves. (they are smaller and thinner)

    You will have to get the correct valves. I suggest ordering them through your shop just so you can nag them if they get the wrong ones!
    Ontario Diver

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    Lemonade's Avatar
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    1/2 inch?

    Aren't they 7/16 ? Same as older PST HP tanks?
    "I know the human being and fish can coexist peacefully." -- George W. Bush

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    No, I guess, they are not 7/16. Doesn't really matter.
    There are two standards, one is much more common than the other.

    DiveRite Express has a good paragraph on the subject.
    http://www.diveriteexpress.com/library/valves.shtml
    "I know the human being and fish can coexist peacefully." -- George W. Bush

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    Ontario Diver's Avatar
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    Quote Originally Posted by Lemonade
    No, I guess, they are not 7/16. Doesn't really matter.
    There are two standards, one is much more common than the other.

    DiveRite Express has a good paragraph on the subject.
    http://www.diveriteexpress.com/library/valves.shtml
    Sorry, we call them 1/2 inch and 3/4 inch around the shop. 3/4 NPS and 7/8 UNF are correct.

    There are some really old tanks with true 1/2 inch machine threads on them with post type valves that need teflon tape when you put them together. They are a similar size to 7/8 UNF.

    It is the same size as a SCBA tanks (firefighter tank) but the Genesis uses a much thinner O-ring.
    Ontario Diver

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    if i understand right like my older PST tank they are 7/8 UNF correct.

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    Quote Originally Posted by medic13
    if i understand right like my older PST tank they are 7/8 UNF correct.
    I believe so, but it is worth checking. Pull a valve off of an al 80 and see if it fits is one way.
    Ontario Diver

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    The HP tank is 7/8 machine thread, fine, O ring. The standard S80 aluminum is 3/4 pipe thread, straight, O ring. The old 72 tanks (circa 1950-1962) were 1/2 pipe thread, tapered. Your tank is 7/8, O ring. The DIN valve you purchase MUST be this size. Do not buy a Sherwood Genesis valve if you do not like the slant design. Buy a US Divers or equivalent. The Japanese Thermo also good.

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