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Thread: Air leak out the back of an RT valve

  1. #1
    Join Date
    Mar 2003
    Location
    Zayante, CA
    Posts
    204

    Air leak out the back of an RT valve

    My Retro Valve is leaking out the back of the valve. 850 psi input pursue 285 FPS, oiled up with auto lube. What’s the issue?

  2. #2
    Join Date
    Nov 2001
    Location
    DeWitt, MI
    Posts
    782
    Do you have a Level 10? If so, they sometimes require a higher pressure safety relief piston - #5 in picture. The older valves that had Level 7s don’t have the newer piston. Contact Tuna or AGD.

    What bolt spring are you running? If gray or red, go down to gold for now. That will let you turn pressure down and achieve same velocity. If you must use gray or red, you’ll likely need the newer piston.

    Is it leaking out the rear tiny side hole too, or just the back where you put the wrench to adjust velocity? If rear tiny side hole is leaking too, clean/re-oil/replace #6 as needed.



    Last edited by nak81783; 08-22-2021 at 06:46 AM.
    Last of the Salzburg Clan

  3. #3
    Join Date
    Mar 2003
    Location
    Zayante, CA
    Posts
    204
    Level 10, I replaced the reg piston when I upgraded it to level 10, close to twenty years ago now. Do they go bad over time? Red spring. Just leaking out the back where the wrench goes.

  4. #4
    Join Date
    Nov 2001
    Location
    DeWitt, MI
    Posts
    782
    Apparently so. From AGD's website: Replace this part when air is venting out the back of the marker and you are shooting less than 300 FPS.

    How badly is it leaking? Maybe try replacing #11 (reg seat) first. A bad reg seat would let excess pressure in, but the venting might "regulate" it such that it still shoots 285fps.

    If you do end up ordering a new piston, perhaps try the gold spring. That might buy you time while the part ships to you.

  5. #5
    Join Date
    Dec 2000
    Location
    offshore
    Posts
    8,514
    Definately replace the reg pin orings and the reg seat oring before scrapping the reg piston...
    Email me for low prices on ALL AGD Products and more. tunaman5@verizon.net
    Tunamart

  6. #6
    Join Date
    Mar 2003
    Location
    Zayante, CA
    Posts
    204
    Not leaking bad. I’ll try changing those o-rings. Thanks guys!

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