Last year I posted my Shurflo Diaphram pump setup, and I ended up having great luck with it:

http://mapletrader.com/community/sho...-Puller/page15

I ended up with about 25 taps on it. I had pretty good vacuum at the farthest point from the pump, but I think I could have done even better. This year, I want to replace a lot of my tangled web of 5/16" lines with a mainline, so I'll probably end up with around 35 taps. Can I get by with 1/2" mainline? Any reason to go bigger than 1/2"?

-gary