1/2" mainline vac transfer

[MAPLE FARMER]

What are people's thoughts on using 1/2" for vac system I'm guessing I'm at close to 70 taps and and two ladders before it hits 3/4. I have a 3hp 35cfm pump and the 1/2" was free so I used it.

[BreezyHill]

for 70 taps it will not be an issue...peak flow of 70 taps is 14 gallons so the line should be less than 17% full so not a problem. The issue would be if it is long runs prior to the 1/2" and if the 1/2 is a long run.

Ben

[MAPLE FARMER]

Ok thanks Ben

Dave c