We currently have one releaser using 1.5" pipe running about 750 feet. This releaser services just under 400 taps. We can expand to about 550 or so with another 1000' mainline.
Instead of putting out 1000' of mainline we are going to run about 1200' 1.5" pipe to a second releaser which will handle 400-500 taps on a 800 foot mainline. This second run can be expanded to include over 1,000 taps if time/need rises.
As mentioned make sure you have a large enough pump to handle the total tap count. Next is the concern if both releasers dump at the same time. I have a run of 4" PVC near the pump and can add another near the releasers to help over come a drop in vacuum.
Mike
Tapping since 1985 (four generations back to early to mid 1900s). 200-250 taps on buckets and then tubing in the mid 90s. 2013- 275 taps w/sap puller 25 gal. 2014-295 taps w/sap puller 55 ga. (re-tapped to vacuum theory) 2015-330 taps full vac. 65 gal, 2016-400 taps 105 gal, 2017-400 taps 95 gal. 2018-additional 800' mainline and maybe 400 new taps for a total near 800 taps. 2x6 Leader WSE (last year on it) supported by a 250 gph RO.