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Discussion in 'Professional Discussions' started by zr100, May 13, 2018.
We don’t have 55+ in most communities I service ...
Are you on mostly wells or municipal water? What part of Jersey?
Up North high pressure is the norm. Rarely do I see anything below 70 and 80-130 is common. Rockland and Orange counties in NY vary widely from 30s up to 90s.
There are many areas with 100+ psi and old galvanized water mains in 100 year old homes. Great pressure but volume is an issue due to accumulated rust in the mains from street to home. I tested one such home recently to estimate a new install and had 110 psi and 7 GPM.
If that main was 3/4" copper it would push 16+ GPM wide open. Always test your volume when old galvanized piping is present.
Central jersey, mercer county. The majority of our systems are municipal water, I’d guess most range 35-50psi at 7-10gpm.
Think of the silver lining here-no need to pay extra for pressure regulating heads. A couple of extra zone valves is the price extracted.
You can do decent small-scale systems with 300's running at 35-40 psi. The heads will never work well at the lower pressures a standard rotor can operate at (with maybe a breakup-screw aiding distribution)
300s are very wimpy at 35-40 but work far better than MPs or R-Vans at those psi. I've use many 45 psi 1800 spray bodies with the R-Vans and they work OK but I stand by the sweet spot being 55-70.
The last 300 system I installed was in 2012 with 65 psi static and 50+ dynamic. It looked great.
Small scale work with the 300's involved mostly the midrange 02 nozzles. No question the 03/93/63 nozzles looked better with additional pressure.
Those 63/93 nozzles were interesting in that they worked well for a lighter application in shade on the same zone as 03s in the sun.
A well designed 300 system is still a sight to behold even years later.
I never used the 01. Fooled around with 63/93, but LOVED THOSE 02 NOZZLES!