No photos. The manifold to the sprinkler system is next to the water meter. I assume they tee right there.
I don't know of any pipes that connect to the sprinkler and the house too.
It's a professional job, I did add 2 stations to the existing 4, and we don't remember hearing this noise before. It sounds like a train goin' thru the house, so I think that we would remember. And, it's not just when another valve starts up, it's consant. Could the pressure be to high? Could the intake valve be bad?
Thanks for any help you can give me.
Joe