SOLVED! Pressure relief valve had blown out o-ring. Replaced with adjustable brass valve and new gauge. Installed, set to 50lbs, turned pump back on and then tightened down until it held, around 70lbs.
Hi all, homeowner here with no knowledge in this area... well serves irrigation only, and is leaking from the silver valve i'm pointing to. Has pressure as you can see, enough to still drive the irrigation system, but i shut it off this morning when we found it - water is blowing by this valve continuously. Suggestions as to what I am looking at here?

u/911wru — 9 days ago