oops. I meant 'negligible' in my previous post not 'negotiable' about the valve leeching into the water. I agree that with discus this is a mood point and brass valves are good, just was throwing that out there.

I have had really good luck with these spears gate valves too;

http://www.marinedepot.com/ps_viewit...FcVgfgodL3MA9Q

Again your local irrigation supply house should have these much cheaper.
Cheers,
DC