Hi all, This is my first post. We recently bought a fixer-upper that had been vacant for a few years (short sale), and were pleased to discover that the well pump works (submersible, size unknown), and the water is of good quality. It currently has an AO Smith V60 20 gallon bladder tank that fills in about 20 seconds. I figure the pump is putting out around 15 gpm. Running some of my own quick capacity tests, it looks like the well is actually capable of maybe 7gpm sustained - so it's possible to overdraw the well after a while. I'm wondering if just putting a CSV in is an acceptable solution, and what things need to be considered when doing so. The pump and associated piping is in unknown condition. I believe all the piping from the house to the well is HDPE. If I were just to slap a CSV into the system, is there anything I need to be worried about, or watch out for? Do I need to worry about the higher pressures encountered at the pump and piping when the valve is in 1gpm mode? Which parts of the system are under increased stress/pressure because of the CSV?