tank leaking out fill nipple when filled

[eric13]

my ttank is leaking out the fill nipple why?

[a_malfunction]

Maybe you have a dirty seal.... Sometimes tanks will leak if they get dirty seals.

[BlackVCG]

There's a pin in the fill nipple with an o-ring on it. If that is dirty, it won't seal properly and leak. Just take off the fill nipple and pull out the pin. Clean and oil the o-ring and see if that works. Use a thread sealant like Loctite 545, 592 or very carefully put a bit of teflon tape on it.

[ProjectMag]

Clarification:

Use the loctite or teflon tape on the fill nipple threads, not the piston that you are checking. This would most definitely cause you problems. Check the piston o-ring like Black said, you may have to replace it.

[TheTramp]

Be VERY carefull that your tank is completely empty when you remove the fill nipple.

[Dubstar112]

on my flatline with the aftermarket fill nipple on, if you do not bleed the fill quickly enough the poppit will not seal

[[M@g_D@ddy]]

My friends WDP AIR tank had the same prob. with it gassed to like 40 psi, take a blunt object, place it in the fil nipple, TAP it, don't hammer it. it might have sealed wrong or gottin somethin in it. it works like a charm