We're finishing up the install of a Berkely 2 h.p multi-stage pump for an HOA - (1 1/2" main - 1" laterals - 2 zones of Rainbird 5006's/1806's w/mp rotators off 1 1/2" Rainbird PGA's) and part of the job required a couple of bores under the neighborhood streets...while we're there they hire us to bore another street for an adjacent HOA. These guys have an irrigation contractor tying a secondary entrance into a golf course's system (multi-stage pumphouse but I've no idea of the system specs or capabilities). During the course of the conversation I learned they plan on cutting in a tee off the nearest Toro head (not sure the series - typical of other I've seen on the course) and using that to feed valves for the addition. I was skeptical for obvious reasons and the guy told me each head had it's own valve and the lines up to each head were always under pressure...is golf course irrigation so different than the commercial/residentials I do everyday? What could the advantage be to having so much linear feet of charged mainline? I believe just the opposite should be true. I've always assumed the major differences were in design and scale...but how are they getting around poc - valve (or master) - head ?