Leaking Ball Valve on Ghetto Gun

[The Kid]

well i made this last week and i found it leaks around the ball when the soda bottle is pressurized but no where else. i usually use about 120 psi in it and it leaks about 5 psi before i fire it and suggestions are much appreciated thanks.

[chaos]

plenty of plumbers tape and/or pile on the epoxy

[The Kid]

the valve is epoxyed and tafron taped on but thats no it the ball in the valve in the first picture the air is leaking around it

[chaos]

so is it leaking amount the threads? or in the inner workings of the valve?

please use the spell-check feature, im almost finding it hard to understand some things you say

[The Kid]

inner workings of the valve

[Pete Zaria]

1) Leak test the gun (pressurized to 20 psi or so, with or without barrel attached) underwater in a sink or bath tub to verify that it is indeed the valve leaking and not the attachment point or the fill point (schrader? can't see in the pic).

2) If it is indeed the valve, try lubricating it. Silicon spray, lithium grease, or as a last-ditch, dishsoap will work - avoid petroleum based lubricants like WD40 or oil, they're bad for rubber seals.

3) If that still doesn't fix it... Get a new ball valve

4) Using the spellchecker wouldn't hurt you any

If it's not the valve... epoxy up wherever it's leaking.

Peace,
Pete Zaria.

[chaos]

oh well it might very well be worn out, sorry but i don't think there's much you can do to fix this certain type of valve.

Where you from btw?

[The Kid]

the valve is brand new and i would have only fired it 20 times kempsey australia and pete i sprayed soapy water on it and its leaking from the meatal part in the middle and yes there is a tyre valve (from auto shop) on it if i ever post it on cannons you'll see it

[MaxuS]

I have the same ball valve, i tried to use it as a pilot on my 1.5" sprinkler valv, but the thing leaks like a sieve, its just because theyre crap.

[The Kid]

damn i spent 10 bucks on that ,oh well

[The Kid]

at the moment i am looking at MrCrowley's sga and looks like he has the same ball valve on his fill valve, i wonder

[cdheller]

I guess i'll ask the obvious.

have you tried to tighten the seat,(the plastic/Teflon seal)?

It looks like a Allen wrench would work ,maybe whit some heat if they used thread locker compounds

or removing the metal retainer checking for fit and funtion and shimming it with washers to increase the seat pressure?

[windshrike]

Use lots of lubricant and if it still leaks, replace it.

[The Kid]

its the inside of the valve thats leaking not the connection to the bottle

[MrCrowley]

at the moment i am looking at MrCrowley's sga and looks like he has the same ball valve on his fill valve, i wonder

I don't have it on there anymore, it was more or less a mock-up, but I do use one on another cannon and it's fine. Where are you from?
If you're not English and don't live in Europe I suggest you try and find a sprinkler valve, some pressure rated PVC and go from there.