Hi, In another thread I asked a question which mentioned that I am planning on putting 11 valves in one manifold. I have carefully planned the grass zones and gotten lots of advice on this. As a result I need 4 grass zones at the back and 4 at the front. I am planning on 3 drip zones. The property is two acres. The suggestion was to put in two manifolds to save on pipe. This is what I did in my last 2 acre property. However, in this case I have assumed to use just one manifold which is quite wide (5FT). It wouldn't be that hard for me to split it and put in two, one on either side. One would have 5 valves, the other 6 valves. The downside to doing this is as follows: 1) It would mean adding an extra sleeve under the 15ft driveway - this isn't that big of a deal because I am going to rent a mole device to burrow the lines under the driveway (as a side if anyone has any advice on this I would appreciate it). But this just means applying the process in a different spot. 2) It would mean an additional backflow device (another hundred bucks) 3) It means more locations where I can get a leak 4) There is no plumbing to the outside on that side of the house and to get it there sounds like a ton of work - I am pretty sure I can access that side of the house from our storage room, but it's probably at least one day of work for me, I could hire a plumber but that would probably be at least 300+ bucks at a guess. 5) The amount of pipe I would be saving would be maybe 200ft of length of 1" pipe (so perhaps 200 bucks saved there) and maybe some a couple hundred feet for the dripper pipe, which at 1/2" would be maybe 50 bucks. Essentially my conclusion is 1 Manifold - probably would be a wash as far as cost, if I hired a plumber to put in the copper to the other side, 1 Manifold would almost certainly be less cost. 1 Manifold - probably = 1 - 2 days less work. 1 Manifold - seems easier to maintain to me than two locations Therefore, I am trying to understand is there any other advantage in doing two locations. Thanks I really appreciate the help in advance, I can still go either way.