Normal house pressure should be between 50-70 PSI. This adapter will break at anything over that.
I agree, that is strange given changing washer didn't resolve problem. Possibly there is a manufacturing problem with threads that attach to valve. Have you taken back for an exchange?
The thread is hose thread, not pipe thread.
No. Rain Bird offers a backflow preventer that is sold separately.
Mine does not leak, but I googled your problem and this is the answer I found. "Some pressure regulators have a small hole in the side of the preset regulators that acts as a relief valve. A little water dripping out is normal. If you get a steady stream out of this hole, seal it with your finger and then let go. Repeat a few times and see if it stops leaking." I'm assuming that dirt or debris in the weep hole can cause this and the directions I found make it sound like that's how you hopefully clear it out. Hope that helps. If it's not the weep hole that's leaking, it may be the gasket.
Not sure but here are my thoughts. This will take any typical outdoor spigot and reduce the psi to get 25psi. I think the flow is going to depend on what psi you start with. If you only have 26psi in the line to start with, you’re not going to be very high. If you only have 20 psi. You’re only going to get a trickle until it builds up enough to get thru. I.e. don’t use it on a rain barrel
First, this is used for a drip irrigation system, not for a lawn irrigation system. If you have drip irrigation system, it depends on what emitters you have connected and on what your water pressure is on the main line. This limits or ensures that the pressure to all your emitters is 25 psi. If you exceed that, some emitters may fail. If your house is on municipal water, your pressure can vary. Your house should have been built to code and you should have a pressure regulator on you main line where it enters the house. Normal water pressure is generally between 40 and 60 PSI. If you are on a well, like I am, it could vary much more as the pump turns on and off. Hope this helped. Good luck.
Rain Bird offers complete satisfaction, so please contact us at 1-800-RAIN-BIRD for assistance. Something is not right, but not sure if it's the reading of the pressure gauge or the actual pressure regulators.