I am setting up a woods that has about 2% slope and will have approximately 1500 taps. I have actually 2 questions. The first is, is a dry line necessary if I over size the main lines? If I use 1 1/4 inch for the mainline instead of 1" and 1" branches off the main will this work? There will be 3 mains with the longest being about a 1000 feet with 500 total taps on that one. The others are similar but shorter. I am estimating a total of about 6000 feet of mains and branches.

The second question is do I add up all of the distances to calculate the CFM drop to the system or do I take the longest mainline distance for CFM drop. Again the will be three mainlines and about 34 lateral branches off of the main lines. Thanks for any help on this.