Q: Hendrickson dg 5025 is leaking from small hole in the center of it. why?
You have already read my response to this question. Nothing has changed. I repeat my recommendation. Sorry Don, I am clueless on this one. I suggest you contact Rainbird and the Manufacturers of the Hendrickson for advice -- here is a link to the Hendrickson website (http://www.hendricksonbros.com/) where you can find contact information and a product manual for this type of regulator. You might also call a professional irrigation installer for advice. Best And Happy Yardening, Nancy