My reply may be a bit out of date, sorry. I just joined the group a few days ago. There are these cool pump units produced by DAB Water Technology (and yes that is their real name). DAB is from Europe and they produce pumps for industrial applications. They are reliable. Its a variable speed controlled pump unit that can maintain a pre-set pressure. I tend to use more horticultural grade drip emitters like Netafim or Rivulis pressure compensated drippers. These have set outputs (0.5 gal, 1 gal, etc per hour) and can operate on an incoming pressure range from 5psi-45psi. Anywho, here are the cool pump units for smaller applications.
https://www.dabpumps.com/en/taxonomy/term/113
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