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  1. #1
    Join Date
    Jun 2006
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    East Warburton, Vic
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    54
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    14,189

    Default Pipe gauge ??? for you plumbing boys

    Guys, been nearly 20yrs from my coppersmithing days when I used to build Hospiital Sterilizers.

    Anyway, I want to install a an airline in my 2 sheds and I am thinking of using 3/4" tube for main line with 1/2" for the droplines.

    Should I use 16# or 18#?

    Also want to put a drain valve on the end of each drop line to keep the condensation to a minimum, was think of 3/8 ball valve, what do you reckon or is there a cheaper valve out there that would be up to the job?

    Hopefully I won't get too much condensation in the line as I will be building a condenser for it as well.

    So with all that in mind, what should I be expected to pay roughly for;

    3/4" tube 16 or 18# hard drawn 6mt lengths
    1/2" tube 16 or 18# hard drawn 6mt lengths
    3/8" ball valves

    Thanks for ya help
    Cheers

    DJ


    ADMIN

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  3. #2
    Join Date
    Jan 2007
    Location
    Adelaide - West
    Age
    43
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    620

    Default

    • $2.00 per fitting- nipples, tees, elbows,
    • class b copper is what you need,
    • 1/2 inch - $30 check with your local
    • 3/4 inch - $45 supplier on these
    • Brass ball valve $5.00


    • Use 15% silver soder due to high stresses involved ( it's more flexible)
    • run pipe at slight fall to drain end ideal 20mm/M, no less than 10mm/M
    • Use gas thread tape and gas thread seal paste.


    Prices vary from state to state quite a bit so you'll need to ring a plumbing supplier.d
    If you dont play it, it's not an instrument!

  4. #3
    Join Date
    May 2006
    Location
    Lake Macquarie NSW Australia
    Posts
    402

    Default

    So thats the reason we don't have enough hospitals!
    D J - sterilized them 20 years ago!

  5. #4
    Join Date
    Jun 2006
    Location
    East Warburton, Vic
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    Default

    Quote Originally Posted by bricks View Post
    • $2.00 per fitting- nipples, tees, elbows,
    • class b copper is what you need,
    • 1/2 inch - $30 check with your local
    • 3/4 inch - $45 supplier on these
    • Brass ball valve $5.00
    • Use 15% silver soder due to high stresses involved ( it's more flexible)
    • run pipe at slight fall to drain end ideal 20mm/M, no less than 10mm/M
    • Use gas thread tape and gas thread seal paste.

    Prices vary from state to state quite a bit so you'll need to ring a plumbing supplier.d
    Thanks bricks , that gives me a starting point, won't look like a complete dill when I walk in the plumbing supplies joint.

    Quote Originally Posted by Linden Hardy View Post
    So thats the reason we don't have enough hospitals!
    D J - sterilized them 20 years ago!

    you're a funny man Linden, didn't build them quite that big, but did build one big enough to drive a couple of Mini's into .
    Cheers

    DJ


    ADMIN

  6. #5
    Join Date
    Oct 2006
    Location
    Armidale NSW
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    53
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    1,938

    Default

    Quote Originally Posted by bricks View Post
    Use gas thread tape and gas thread seal paste.
    What's the difference between gas and "normal" thread tape?
    I have both, the gas is yellow and the normal is pink (got to worry about you plumbers) or white, but other than colour they look pretty much the same.
    Cheers.

    Vernon.
    __________________________________________________
    Bite off more than you can chew and then chew like crazy.

  7. #6
    Join Date
    Jul 2007
    Location
    Sydney-south
    Posts
    333

    Default

    May I just add that off your main 3/4 run, take the 1/2 branches off the top and back down, this will eliminate NEARLY all condensation going down to the valve and still run the main line with slight fall with a tail pipe at the end. Dont use white tape, its rubbish. You can use either the pink or yellow stuff, the yellow stuff is formulated a little differently as hydrocarbon gases for some reason has a reaction to something in the tape which makes it harden and crack. As Bricks said type B copper tube is the way to go, I belive that 5% silver will do the job, compressed air wont out perform the solder and its around $12 cheaper PER STICK!!!!

    $45 for a length of 3/4, man im driving to Adelaide to buy a sling!!!!
    $45 is the absolute dirt cheapest you'd be lucky to find here as a plumber off the street and it will be the korean or chinese stuff. A mate of mine who works for a large construction mob says they buy it by the container from china in 12m lengths, at around $1 per metre for 3/4!!!!
    Plumbers were around long before Jesus was a carpenter

  8. #7
    Join Date
    Jun 2006
    Location
    East Warburton, Vic
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    Default

    Cheers W/P, did have the drop lines coming off the top in mind, with the drain valve about a foot or so below the connection point. Also going to have the mainline looped so that it is endless.

    Thanks for the explaining the differences on the tape too.

    I do have quite a few rods of different grades so I have several choices and won't be needing to buy any, also have at least 50 rods of 56% silver solder, so could use that , at $19 to $21 a stick I don't think so I'll save that for the higher quality work .
    Cheers

    DJ


    ADMIN

  9. #8
    Join Date
    Dec 2005
    Location
    South Australia
    Posts
    4,475

    Default

    Unless you you have the tubr already go for the plastic airline tube it's great stuff no soldering just conects with screw fittings drain valves atc all available to suit

  10. #9
    Join Date
    Dec 2005
    Location
    South Australia
    Posts
    4,475

    Default

    Dj the product I refered to is MaXair, as I said if you don't already have tubing give this a look it's the best and simplest system I have ever used

  11. #10
    Join Date
    Jun 2006
    Location
    East Warburton, Vic
    Age
    54
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    Default

    Cheers China, will have a look into it
    Cheers

    DJ


    ADMIN

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