Hello all i am having a new installation done and had the mfg rep and installer came out to lay it out and do my material list.
They are proposing a single line system 2 1-1/4 mains at approx 1200'ea and 1 1"main at approx 600' 1300 taps on high vac.
Terain is well sloped. Installer says he can put up to 20 taps on a 5/16" lateral and laterals can run up to 400--500 ft.
When i questioned this ,( as i cannot find any evidece or anyone else that agrees with this) they claim that Cornell univ. has done studies on more taps on 5/16" . And 5 taps per lateral and 100' limit lateral run is old school .
I would love to hear Dr Tims take on this and anybody elses thought.
Other suppliers i have asked for a quote from thinks this is crazy talk. Right or wrong ?

Thank You
Mike