I have to be careful what I say about manifolds because they seem to be the MO in many places. In DFW manifolds mean lousy system. When I run into a manifold set up I know it was done by a homeowner or an inexperienced irrigator. In this case we had a break on a zone 8' from that bradford pear on the zone that did front rotors. As we tracked the gusher it kept getting closer to the tree. So we tracked the valve down and discovered the manifold box. So basically the installer ran 1" mainline 100 feet from the meter to the side of the house. Set the manifold up and then ran the pipe back under the tree to the front yard for the front zone. Wasted piping and could have installed the valve in the zone midpoint which we ended up doing to bypass the break.