Where can i find a sprinkler valve?

[qwerty]

Ok, thanks for telling me

[Biopyro]

:'( damnit yeah, a few ebay links in there, try removing a couple but to no avail.
Basically you need to look for diaphragm valve, or solenoid valve and look for a familiar picture. Often the diaphragm valves have to be "unscrewed" to actuate, but they would probably be pneumatically modifiable, as they all use the same principle.

I don't understand why you still want to use a sprinkler valve...

[PCGUY]

Fixed your post, Bio.

[Biopyro]

ah brilliant thanks. I hadn't thought of that

[qwerty]

I want to us a sprinkler valve because ive tried 2 piston guns and none of them have worked but i will make a QEV airsoft gun

[jmccalip]

for the last time im from the UK and i cant get it shipped over from the US

What do you mean you're not allowed to get it shipped over? If I were you, I'd have someone buy a sprinkler valve at Home Depot in the states for $11 and ship it to the UK. Total cost should be under $25 including valve and postage.