1/4 gate valve
 

anyone know of a source for 1/4 gate valves ?

Yikes...not sure I've ever even seen a gate valve that small. Bulk Reef Supply has ball valves for that size though.

try Home Depot in the irrigation isle, they have a bunch of wierd valves there for underground sprinkelers

Don't think you'll find it at Home Depot. Not sure were you'd find one. That would be pretty small, are you sure they even exist.

does it need to be pvc? if not I am pretty sure I have seen them at Home Hardware here in town or they can be ordered at Fairview Fittings (1-888-294-7104) part number is 217-B. if they wont sell direct to you I could bring it in on my account.

I have one but it wont shut off, useing it for controling the feed rate to my calcium reactor, the ball valves are hard to fine tune

What you are looking for is called a needle valve. You might try calling these guys...

http://www.watercoolerparts.com/john...FRIcawodRRlijA

try andrew sheret or emco... if they dont have them in, they can order them.