3/4" vs. 1" valves
I installed (and have been running and maintaining) 15 irrigation zones for lawns, garden and fruit trees 20 years ago. All basically 3/4 PVC through 3/4" valves. I am adding 12 zones (two 6 valve manifolds) for new raised beds in the garden and a small vineyard. The main water supply line coming from the house is 3/4" PVC @ about 50 PSI. In the past I have built (and rebuilt) just gluing everything together at the bottom of the manifold. I just came across your "Dura-Valve-Manifold-Quad-Port" which looks like it would take some of the tedium out of building them. However, from what I can tell these only come in the 1" size. My questions:
1) Does it matter if the manifold plumbing is 1" being fed by my existing 3/4" supply?
2) If going into a 1" manifold doesn't matter should I go ahead and use 1" valves or put a reducer on top and use a 3/4" valve?